Home ReviewsRefund
Home/Chevrolet/Camaro/Chevrolet Camaro V (2009-2013)/Repair manual/Testing & Diagnostics/Engine Controls and Fuel - 3.6l - DTC p0008 Through p0191
Contents Wiring diagrams Section: Testing & Diagnostics All sections

Engine Controls and Fuel - 3.6l - DTC p0008 Through p0191 Chevrolet Camaro V

Testing & Diagnostics ~23120 words

Diagnostic Instructions

  1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

Circuit/System Description

The engine control module (ECM) tests for a misalignment between both camshafts on one bank of the engine and the crankshaft. The misalignment would be at an idler sprocket for either bank or at the crankshaft. Once the ECM learns the position of both camshafts on one bank of the engine, the ECM compares the learned values to a reference value. The ECM will set a DTC if both learned values for one bank of the engine are exceeding a calibrated threshold in the same direction.

Conditions for Running the DTC

  1. DTC P0010, P0011, P0013, P0014, P0020, P0021, P0023, P0024, P0341, P0342, P0343, P0346, P0347, P0348, P0366, P0367, P0368, P0391, P0392, P0393, P2088, P2089, P2090, P2091, P2092, P2093, P2094, or P2095 is not set.
  2. The engine is operating for greater than 50 seconds.
  3. The engine coolant temperature is between 0-95°C (32-203°F).
  4. The calculated engine oil temperature is colder than 120°C (248°F).
  5. The engine must accelerate such that the CMP actuator system is commanded from the park position to the phased position. This is considered a cam control cycle. There must be a minimum of 2 cam control cycles for at least 2.5 seconds each, in the phased position.
  6. DTC P0008 and P0009 run continuously once the above conditions are met, approximately 600 seconds.

Conditions for Setting the DTC

The ECM detects that both camshafts on either bank of the engine are mis-aligned with the crankshaft for greater than 4 seconds or a cumulative of 30 seconds.

Action Taken When the DTC Sets

DTC P0008 and P0009 are type B DTCs.

Conditions for Clearing the DTC

DTC P0008 and P0009 are type B DTCs.

Diagnostic Aids

  1. Inspect the engine for any recent engine mechanical repairs. An incorrectly installed secondary timing chain can cause this DTC to set.
  2. A single failed camshaft actuator or actuator solenoid will not cause this DTC to set. This diagnostic algorithm is designed to detect an alignment condition between a primary intermediate sprocket and the secondary timing chain, or the alignment between a primary intermediate sprocket and the crankshaft. Either condition would cause the camshaft timing for both cams on one bank to be off an equal number of degrees.
  3. The presence of DTCs P0008 and P0009 along with P0016, P0017, P0018, and P0019 indicates a possible condition with the primary timing chain and the alignment between both intermediate sprockets and the crankshaft. Or, the crankshaft reluctor wheel has moved and is no longer referenced to top dead center (TDC).
  4. Observe the Desired Intake Camshaft Position and the Camshaft Position parameters with a scan tool before a DTC sets. This may help to isolate whether a condition is specific to one camshaft, one bank, or caused by a condition with the primary crankshaft timing.

Reference Information

DTC Type Reference

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification

  1. Clear the DTCs with a scan tool.
  2. Allow the engine to reach the normal operating temperature.
  3. Idle the engine for 10 minutes or until a DTC sets. Observe the DTC information with a scan tool, DTCs P0008 and P0009 should not set.
  4. Operate the vehicle within the Conditions for Running the DTC to verify the DTC does not reset. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.

Circuit/System Testing

  1. Inspect the timing chains and tensioners for excessive wear or misalignment. If you find a condition with the timing chains or tensioners, repair as necessary.
  2. Inspect the crankshaft reluctor wheel for being mis-positioned on the crankshaft. If you find a condition with the crankshaft, repair as necessary.

Repair Procedures

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

  1. «Timing Chain Alignment Diagram»(/chevrolet/camaro/v-2009-2013/remont/mechanical/#engine-mechanical-36l-wiring-schematics-and-timing-chain-routing-diagrams)
  2. «Camshaft Timing Drive Components Cleaning and Inspection»(/chevrolet/camaro/v-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle-2-of-3)
  3. «Crankshaft and Bearing Cleaning and Inspection»(/chevrolet/camaro/v-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle-2-of-3)
  1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

The camshaft position actuator system enables the Engine Control Module (ECM) to change the timing of the camshafts while the engine is operating. The camshaft position actuator solenoid signal from the ECM is pulse width modulated (PWM). The ECM controls the camshaft position actuator solenoid duty cycle by controlling the amount of solenoid ON time. The camshaft position actuator solenoid controls the advance or the retard of each camshaft. The camshaft position actuator solenoid controls the oil flow that applies the pressure to advance or retard the camshafts.

  1. Before the ECM can report DTC P000A, P000B, P000C, P000D, P0011, P0014, P0021, or P0024 failed, DTCs P0010, P0013, P0020, P0023, P0341, P0342, P0343, P0346, P0347, P0348, P0366, P0367, P0368, P0391, P0392, P0393, P2088, P2089, P2090, P2091, P2092, P2093, P2094, and P2095 must run and pass.
  2. DTC P0010, P0013, P0020, P0023, P2088, P2089, P2090, P2091, P2092, P2093, P2094, and P2095 is not set.
  3. The engine is operating for greater than 1 seconds.
  4. The engine speed is greater than 520 RPM.
  5. The engine must accelerate such that the CMP actuator system is commanded from the park position to the phased position. This is considered a cam control cycle. There must be a minimum of 2 cam control cycles for at least 2.5 seconds each in the phased position.
  6. DTCs P000A, P000B, P000C, P000D, P0011, P0014, P0021, and P0024 run continuously once the above conditions are met for greater than 600 seconds.
  1. The ECM detects the difference between the desired camshaft position angle and the actual camshaft position angle is greater than 7-8 degrees. OR
  2. The ECM detects a slow response, a deviation greater than 1.5 degrees in time greater than 2.5 seconds, for the actual camshaft position angle to match the desired position angle during the test.
  3. Either condition exists for greater than 1 second.

DTCs P000A, P000B, P000C, P000D, P0011, P0014, P0021, and P0024 are type B DTCs.

DTCs P000A, P000B, P000C, P000D, P0011, P0014, P0021, and P0024 are type B DTCs.

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
  2. «Connector Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures)
  4. «Wiring Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

DTC Type Reference

Scan Tool Reference

Control Module References for scan tool information

Special Tools

  1. J 35616-200: Test Lamp Kit
  2. For equivalent regional tools, refer to «Special Tools»(/chevrolet/camaro/v-2009-2013/remont/testing-diagnostics/#engine-controls-and-fuel-36l-special-tools-and-equipment) .
  1. The engine oil condition has a major impact on the camshaft actuator system.
  2. A low oil level condition may set this DTC. The engine may require an oil change. Inquire with the customer when the last oil change was performed. You may also monitor the scan tool Engine Oil Life parameter. Advise the customer an oil change may be required.
  3. Inspect the engine for any recent engine mechanical repairs. An incorrectly installed camshaft, camshaft actuator, or timing chain can cause this DTC to set.
  1. Ignition ON, observe the scan tool DTC information. Verify that none of the following DTCs are set. DTC P0016, P0017, P0018, P0019, P0335, P0336, P0338, P0341, P0342, P0343, P0346, P0347, P0348, P0366, P0367, P0368, P0391, P0392, P0393, P0521, P0522, P0523, P0638, P2100, P2101, or P2119. If any of the DTCs are set, refer to «Diagnostic Trouble Code (DTC) List - Vehicle»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-trouble-code-dtc-list) for further diagnosis.
  2. Engine idling, command the appropriate Camshaft Position Actuator from 0 degrees to 40 degrees and back to zero while observing the appropriate scan tool Camshaft Position Variance parameters. The Camshaft Position Variance should be less than 2 degrees in each of the commanded states.
  3. Operate the vehicle within the Conditions for Running the DTC to verify the DTC does not reset. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.
  1. Ignition OFF, disconnect the harness connector at the appropriate Q6 Camshaft Position Actuator Solenoid Valve.
  2. Ignition ON, load test for B+ between the ignition circuit terminal 1 and ground. If less than the specified range, test the ignition voltage circuit for a short to ground or an open/high resistance. If the circuit tests normal and the ignition circuit fuse is open, test all the components connected to the ignition circuit and replace as necessary.
  3. Connect a test lamp between the control circuit terminal 2 and B+.
  4. Command the appropriate Camshaft Position Actuator Solenoid Valve ON with a scan tool.
  5. Load test for less than 1 V between the control circuit terminal 2 and ground. If greater than the specified range, test the control circuit for an open/high resistance. If the circuit/connections test normal, replace the K20 ECM.
  6. Remove the Q6 Camshaft Position Actuator Solenoid Valve. Inspect the Camshaft Position Actuator Solenoid Valve and mounting area for the following conditions: For a torn, restricted, mis-positioned, or missing screens at the solenoid valve For engine oil leaks between the oil sealing lands of the solenoid valve-Inspect the lands of the solenoid for nicks. For oil seepage at the solenoid connector If a condition is found, replace Q6 Camshaft Position Actuator Solenoid Valve.
  7. Ignition OFF, swap the Q6 Camshaft Position Actuator Solenoid Valve with a Q6 Camshaft Position Actuator Solenoid Valve that is operating correctly.
  8. Engine idling. Command the appropriate Camshaft Position Actuator from 0 degrees to 40 degrees and back to zero while observing the appropriate scan tool Camshaft Position Variance parameters. The Camshaft Position Variance should be less than 2 degrees in each of the commanded states. If greater than the specified value, replace the mechanical camshaft position actuator.
  9. If all circuits/connections test normal, test or replace the Q6 Camshaft Position Actuator Solenoid Valve.

Component Testing

  1. Ignition OFF, disconnect the harness connector at the appropriate Q6 Camshaft Position Actuator Solenoid Valve.
  2. Test for 7-12 ohms between the control terminal 2 and the ignition terminal 1 of the solenoid. If not within the specified range, replace the Q6 Camshaft Position Actuator Solenoid Valve.
  3. Test for infinite resistance between each terminal and the solenoid housing. If not the specified value, replace the Q6 Camshaft Position Actuator Solenoid Valve.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

  1. «Camshaft Position Actuator Replacement - Bank 1 (LF1 or LFW)»(/chevrolet/camaro/v-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle-1-of-2)
  2. «Camshaft Position Actuator Replacement - Bank 2 (LF1 or LFW)»(/chevrolet/camaro/v-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle-1-of-2)
  3. «Camshaft Position Actuator Solenoid Valve Solenoid Replacement - Bank 1 (Right Side) Intake»(/chevrolet/camaro/v-2009-2013/remont/testing-diagnostics/#engine-controls-and-fuel-36l-repair-instructions)
  4. «Camshaft Position Actuator Solenoid Valve Solenoid Replacement - Bank 1 (Right Side) Exhaust»(/chevrolet/camaro/v-2009-2013/remont/testing-diagnostics/#engine-controls-and-fuel-36l-repair-instructions)
  5. «Camshaft Position Actuator Solenoid Valve Solenoid Replacement - Bank 2 (Left Side) Intake»(/chevrolet/camaro/v-2009-2013/remont/testing-diagnostics/#engine-controls-and-fuel-36l-repair-instructions)
  6. «Camshaft Position Actuator Solenoid Valve Solenoid Replacement - Bank 2 (Left Side) Exhaust»(/chevrolet/camaro/v-2009-2013/remont/testing-diagnostics/#engine-controls-and-fuel-36l-repair-instructions)
  7. «Control Module References»(/chevrolet/camaro/v-2009-2013/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for ECM replacement, programming, and setup
  1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

The camshaft position actuator system enables the Engine Control Module (ECM) to change the timing of the camshafts while the engine is operating. The Camshaft Position Actuator Solenoid Valve signal from the ECM is pulse width modulated (PWM). The ECM controls the Camshaft Position Actuator Solenoid Valve duty cycle by controlling the amount of solenoid valve ON time. The Camshaft Position Actuator Solenoid Valve controls the advance or the retard of each camshaft. The Camshaft Position Actuator Solenoid Valve controls the oil flow that applies the pressure to advance or retard the camshafts.

Ignition voltage is supplied directly to the Camshaft Position Actuator Solenoid Valve. The ECM controls the solenoid valve by grounding the control circuit with a solid state device called a driver. The driver is equipped with a feedback circuit that is pulled-up to a voltage. The ECM can determine if the control circuit is open, shorted to ground, or shorted to a voltage by monitoring the feedback voltage.

  1. The engine speed is greater than 80 RPM.
  2. The ignition voltage is between 10-18 volts.
  3. The ECM has commanded the CMP actuator solenoid ON and OFF at least once during the ignition cycle.
  4. DTCs P0010, P0013, P0020, P0023, P2088, P2089, P2090, P2091, P2092, P2093, P2094, and P2095 run continuously once the above conditions are met for greater than 1 second.

P0010, P0013, P0020, P0023

The ECM detects an open in the CMP actuator solenoid circuits for greater than 1 second or a cumulative of 5 seconds, when the solenoid is commanded OFF.

P2088, P2090, P2092, P2094

The ECM detects a short to ground in the CMP actuator solenoid circuits for greater than 1 second or a cumulative of 5 seconds, when the solenoid is commanded OFF.

P2089, P2091, P2093, P2095

The ECM detects a short to voltage in the CMP actuator solenoid circuits for greater than 1 second or a cumulative of 5 seconds, when the solenoid is commanded ON.

DTCs P0010, P0013, P0020, P0023, P2088, P2089, P2090, P2091, P2092, P2093, P2094, and P2095 are type B DTCs.

DTCs P0010, P0013, P0020, P0023, P2088, P2089, P2090, P2091, P2092, P2093, P2094, and P2095 are type B DTCs.

If the condition is intermittent, move the related harnesses and connectors, with the engine operating, while monitoring the scan tool circuit status parameters for the component. The circuit status parameters change from OK or Not Run to Fault if there is a condition with the circuit or a connection.

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
  2. «Connector Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures)
  4. «Wiring Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

DTC Type Reference

Scan Tool Reference

Control Module References for scan tool information

  1. With the engine at normal operating temperature, raise the engine speed to 2,000 RPM for 10 seconds. DTCs P0010, P0013, P0020, P0023, P2088, P2089, P2090, P2091, P2092, P2093, P2094, or P2095 should not set.
  2. Operate the vehicle within the Conditions for Running the DTC to verify the DTC does not reset. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.
  1. Ignition OFF, disconnect the harness connector at the appropriate Q6 Camshaft Position Actuator Solenoid Valve.
  2. Ignition ON, verify that a test lamp illuminates between the ignition circuit terminal 1 and ground. If the test lamp does not illuminate, test the circuit for a short to ground or an open/high resistance. If the circuit tests normal and the ignition circuit fuse is open, test all the components connected to the ignition circuit and replace as necessary.
  3. Connect a DMM, set on the diode setting, between the control circuit terminal 2 and ground. Verify the voltage is greater than 2.0 V. If the DMM displays OL, test the control circuit for a short to voltage or an open/high resistance. If the circuit/connections test normal, replace the K20 ECM. If less than the specified value, test the control circuit for a short to ground. If the circuit tests normal, replace the K20 ECM.
  4. Command the Camshaft Position Actuator Solenoid Valve ON and OFF with a scan tool. The DMM should transition from greater than 2 V when commanded OFF to less than 1 V, when commanded ON. If the circuit voltage does not correspond to the specified values, replace the K20 ECM.
  5. If all circuits/connections test normal, test or replace the Q6 Camshaft Position Actuator Solenoid Valve.
  1. Ignition OFF, disconnect the harness connector at the appropriate Q6 Camshaft Position Actuator Solenoid Valve.
  2. Test for 7-12 ohms between the control terminal 2 and the ignition terminal 1 of the solenoid. If not within the specified range, replace the Q6 Camshaft Position Actuator Solenoid Valve.
  3. Test for infinite resistance between each terminal and the solenoid housing. If not the specified value, replace the Q6 Camshaft Position Actuator Solenoid Valve.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

  1. «Camshaft Position Actuator Solenoid Valve Solenoid Replacement - Bank 1 (Right Side) Intake»(/chevrolet/camaro/v-2009-2013/remont/testing-diagnostics/#engine-controls-and-fuel-36l-repair-instructions)
  2. «Camshaft Position Actuator Solenoid Valve Solenoid Replacement - Bank 1 (Right Side) Exhaust»(/chevrolet/camaro/v-2009-2013/remont/testing-diagnostics/#engine-controls-and-fuel-36l-repair-instructions)
  3. «Camshaft Position Actuator Solenoid Valve Solenoid Replacement - Bank 2 (Left Side) Intake»(/chevrolet/camaro/v-2009-2013/remont/testing-diagnostics/#engine-controls-and-fuel-36l-repair-instructions)
  4. «Camshaft Position Actuator Solenoid Valve Solenoid Replacement - Bank 2 (Left Side) Exhaust»(/chevrolet/camaro/v-2009-2013/remont/testing-diagnostics/#engine-controls-and-fuel-36l-repair-instructions)
  5. «Control Module References»(/chevrolet/camaro/v-2009-2013/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for ECM replacement, setup, and programming
  1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

This diagnostic monitors the relationship between the crankshaft and the camshafts. The engine control module (ECM) is continuously comparing the CKP sensor signal to the CMP sensor signals. The ECM can detect incorrect camshaft to crankshaft timing. An incorrect position can be caused by either engine timing or incorrect indexing of the camshaft drive chains.

  1. Before the ECM can report DTC P0016, P0017, P0018, or P0019 failed, DTCs P0010, P0011, P0013, P0014, P0020, P0021, P0023, P0024, P0335, P0336, P0338, P0341, P0342, P0343, P0346, P0347, P0348, P0366, P0367, P0368, P0391, P0392, P0393, P2088, P2089, P2090, P2091, P2092, P2093, P2094, and P2095 must run and pass.
  2. The engine is operating for greater than 50 seconds.
  3. The engine coolant temperature is between 0-95°C (32-203°F).
  4. The calculated engine oil temperature is less than 120°C (248°F).
  5. DTC P0016, P0017, P0018, and P0019 run continuously once the above conditions are met for approximately 10 minutes.

The ECM detects a deviation in the relationship between a camshaft and the crankshaft. The ECM detects the learned camshaft angle is greater than 10 degrees advanced or 10 degrees retarded in relationship to the crankshaft.

OR

The ECM detects the actual camshaft angle is advanced 15 degrees or retarded 21 degrees in relationship to the crankshaft when the camshafts are commanded to the parked position.

DTCs P0016, P0017, P0018, and P0019 are type B DTCs.

DTCs P0016, P0017, P0018, and P0019 are type B DTCs.

  1. Inspect the engine for any recent engine mechanical repairs. An incorrectly installed camshaft, camshaft actuator, camshaft sensor, crankshaft sensor, or timing chain can cause this DTC to set.
  2. The presence of DTCs P0008 and P0009 along with P0016, P0017, P0018, and P0019 indicates a possible condition with the primary timing chain and the alignment between both intermediate sprockets and the crankshaft. Or, the crankshaft reluctor wheel has moved and is no longer referenced to top dead center (TDC).
  3. Observe the Desired Intake Camshaft Position and the Camshaft Position parameters with a scan tool before a DTC sets. This may help to isolate whether a condition is specific to one camshaft, one bank, or caused by a condition with the primary crankshaft timing.

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
  2. «Connector Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures)
  4. «Wiring Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

DTC Type Reference

Scan Tool Reference

Control Module References for scan tool information

  1. Ignition ON, observe the DTC information with a scan tool. Verify that none of the following DTCs are set. DTC P0010, P0013, P0020, P0023, P0335, P0336, P0338, P0341, P0342, P0343, P0346, P0347, P0348, P0366, P0367, P0368, P0391, P0392, P0393, P2088, P2089, P2090, P2091, P2092, P2093, P2094, or P2095. If any of the DTCs listed are set refer to «Diagnostic Trouble Code (DTC) List - Vehicle»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-trouble-code-dtc-list) for further diagnosis.
  2. Idle the engine at normal operating temperature for 10 minutes. DTCs P0016, P0017, P0018, or P0019 should not set. If a DTC sets, inspect for the following and repair as necessary: The correct installation of the camshaft sensors The correct installation of the crankshaft sensor A timing chain tensioner condition An incorrectly installed timing chain Excessive play in the timing chain A mechanical cam actuator that is stuck in the full advance or retard position. A timing chain that jumped teeth A crankshaft reluctor wheel that has moved in relationship to top dead center (TDC) on the crankshaft
  3. Operate the vehicle within the Conditions for Running the DTC to verify the DTC does not reset. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

  1. «Timing Chain Alignment Diagram»(/chevrolet/camaro/v-2009-2013/remont/mechanical/#engine-mechanical-36l-wiring-schematics-and-timing-chain-routing-diagrams)
  2. «Camshaft Timing Drive Components Cleaning and Inspection»(/chevrolet/camaro/v-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle-2-of-3)
  3. «Crankshaft and Bearing Cleaning and Inspection»(/chevrolet/camaro/v-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle-2-of-3)
  1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

Diagnostic Fault Information

CircuitShort to GroundOpen/High ResistanceShort to VoltageSignal Performance
Ignition VoltageP0030, P0036, P0050, P0056P0030, P0036, P0050, P0056P0135, P0141, P0155, P0161
HO2S Heater Control Sensor 1P0031, P0051P0030, P0050, P0134, P0154P0032, P0052P0135, P0141, P0155, P0161
HO2S Heater Control Sensor 2P0037, P0057P0036, P0056, P013A, P013C, P0140, P0160P0038, P0058P013E, P0135, P014A, P0141, P0155, P0161

Circuit Description

The heated oxygen sensor (HO2S) heater reduces the time required for the oxygen sensor to reach operating temperature and maintains the operating temperature during extended idle periods. When the ignition is turned to the ON position, ignition voltage is supplied directly to the sensor heater. The engine control module (ECM) controls the heater operation by first modulating the control circuit to ground when the sensors are cold. This prevents the possibility of thermal shock to the sensor, from condensation build-up on the sensor, by controlling the sensors rate of heating. After a predetermined amount of time, the ECM commands the heaters ON continuously. Once the sensor reaches operating temperature, the ECM may modulate the heater control circuit to ground, to maintain a desired temperature.

The ECM controls the heater by grounding the control circuit with a solid state device called a driver. The driver is equipped with a feedback circuit that is pulled-up to voltage. The ECM can determine if the control circuit is open, shorted to ground, or shorted to a voltage by monitoring the feedback voltage.

P0030, P0031, P0032, P0050, P0051, P0052

  1. The ignition voltage is between 10-18 V.
  2. The engine speed is greater than 240 RPM.
  3. The HO2S heater is commanded ON.
  4. The DTCs run continuously once the above conditions are met for 5 s.

P0036, P0037, P0038, P0056, P0057, P0058

  1. The ignition voltage is between 10-18 V.
  2. The engine speed is greater than 80 RPM.
  3. The HO2S heater is commanded ON and OFF at least once during the ignition cycle.
  4. The HO2S 2 is at operating temperature.
  5. The DTCs run continuously once the above conditions are met.

P0030, P0036, P0050, and P0056

The ECM detects an open in the heater circuits of the HO2S when the heater is commanded OFF. The condition exists for greater than 4 s or a cumulative of 30 s.

P0031, P0037, P0051, and P0057

The ECM detects a short to ground in the heater circuits of the HO2S when the heater is commanded OFF. The condition exists for greater than 4 s or a cumulative of 30 s.

P0032, P0038, P0052, and P0058

The ECM detects a short to voltage in the heater circuits of the HO2S when the heater is commanded ON. The condition exists for greater than 4 s or a cumulative of 30 s.

DTCs P0030, P0031, P0032, P0036, P0037, P0038, P0050, P0051, P0052, P0056, P0057, and P0058 are Type B DTCs.

Conditions for Clearing the MIL/DTC

DTCs P0030, P0031, P0032, P0036, P0037, P0038, P0050, P0051, P0052, P0056, P0057, and P0058 are Type B DTCs.

  1. If the condition is intermittent, move the related harnesses and connectors, with the engine operating, while monitoring the scan tool circuit test status parameters for the component. The circuit test status parameters change from OK or Not Run to Fault if there is a condition with the circuit or a connection.
  2. An open fuse in the HO2S heater circuit may be caused by the heater element in one of the sensors. The condition may not be present until the sensor operates for a period of time. If no fault is present in the heater circuit, monitor the amperage of each heater using the DMM to determine if one of the heater elements is the cause of the open fuse. Inspect the sensor pigtail or the harness for contacting the exhaust system.

Schematic Reference

Connector End View Reference

Electrical Information Reference

  1. «Circuit Testing»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
  2. «Connector Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures)
  4. «Wiring Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

DTC Type Reference

Scan Tool Reference

Control Module References for scan tool information

  1. Engine idling at operating temperature for at least 30 s. Observe the DTC information, DTCs P0030, P0031, P0032, P0036, P0037, P0038, P0050, P0051, P0052, P0056, P0057, and P0058 should not set.
  2. Observe the appropriate scan tool HO2S Heater Circuit Test Status parameter. The parameter should display OK or Not Run.
  3. Operate the vehicle within the Conditions for Running the DTC to verify the DTC does not reset. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.
  1. Ignition OFF, disconnect the harness connector at the appropriate B52 HO2S.
  2. Ignition ON, verify that a test lamp illuminates between the appropriate ignition circuit terminal and ground. HO2S bank 1 sensor 1 terminal D or 1 HO2S bank 2 sensor 1 terminal D or 1 HO2S bank 1 sensor 2 terminal C or 1 HO2S bank 2 sensor 2 terminal C or 1, with manual transmission HO2S bank 2 sensor 2 terminal D or 1, with automatic transmission If the test lamp does not illuminate, test the ignition circuit for a short to ground or an open/high resistance. If the circuit tests normal and the ignition circuit fuse is open, test all the components connected to the ignition circuit and replace as necessary.
  3. Connect a test lamp between the appropriate heater control circuit terminal and B+. The test lamp should not illuminate. HO2S bank 1 sensor 1 terminal E or 2 HO2S bank 2 sensor 1 terminal E or 2 HO2S bank 1 sensor 2 terminal D or 2 HO2S bank 2 sensor 2 terminal D or 2, with manual transmission HO2S bank 2 sensor 2 terminal C or 1, with automatic transmission If the test lamp is always ON, test the control circuit for a short to ground. If the circuit/connections test normal, replace the K20 ECM.
  4. Idle the engine, and verify the test lamp illuminates or flashes. If the test lamp is always OFF, test the control circuit for an open/high resistance. If the circuit/connections test normal, replace the K20 ECM.
  5. Ignition ON, test for 2.0-3.0 V between the appropriate control circuit terminal and ground. HO2S bank 1 sensor 1 terminal E or 2 HO2S bank 2 sensor 1 terminal E or 2 HO2S bank 1 sensor 2 terminal D or 2 HO2S bank 2 sensor 2 terminal D or 2, with manual transmission HO2S bank 2 sensor 2 terminal C or 1, with automatic transmission If not within the specified range, test the control circuit for a short to voltage. If the circuit/connections test normal, replace the K20 ECM.
  6. If all circuits/connections test normal, test or replace the B52 HO2S sensor.
  1. Ignition OFF, disconnect the harness connector at the B52 HO2S.
  2. Test for 5-25 ohms between the appropriate control and the ignition terminals of the B52 HO2S. HO2S bank 1 sensor 1 terminal E or 2 and D or 1 HO2S bank 2 sensor 1 terminal E or 2 and D or 1 HO2S bank 1 sensor 2 terminal D or 2 and C or 1 HO2S bank 2 sensor 2 terminal D or 2, and C or 1, with manual transmission HO2S bank 2 sensor 2 terminal C or 1, and D or 1, with automatic transmission If not within the specified range, replace the B52 HO2S.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

  1. «Heated Oxygen Sensor Replacement - Bank 1 Sensor 1»(/chevrolet/camaro/v-2009-2013/remont/testing-diagnostics/#engine-controls-and-fuel-36l-repair-instructions)
  2. «Heated Oxygen Sensor Replacement - Bank 1 Sensor 2»(/chevrolet/camaro/v-2009-2013/remont/testing-diagnostics/#engine-controls-and-fuel-36l-repair-instructions)
  3. «Heated Oxygen Sensor Replacement - Bank 2 Sensor 1»(/chevrolet/camaro/v-2009-2013/remont/testing-diagnostics/#engine-controls-and-fuel-36l-repair-instructions)
  4. «Heated Oxygen Sensor Replacement - Bank 2 Sensor 2»(/chevrolet/camaro/v-2009-2013/remont/testing-diagnostics/#engine-controls-and-fuel-36l-repair-instructions)
  5. «Control Module References»(/chevrolet/camaro/v-2009-2013/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for ECM replacement, setup, and programming
  1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

The fuel rail pressure sensor detects fuel pressure within the fuel rail. The engine control module (ECM) provides a 5 V reference voltage on the 5 V reference circuit and ground on the low reference circuit. The ECM receives a varying signal voltage on the signal circuit.

High pressure fuel is regulated by the high pressure fuel pump actuator, which is a part of the high pressure fuel pump. The high pressure fuel pump actuator is a solenoid valve. The ECM provides a voltage on the actuator high control circuit and ground on the actuator low control circuit. Both circuits are controlled through output drivers within the ECM. When deactivated, both drivers are disabled. When activated, the high control circuit driver energizes the high pressure fuel pump actuator and the low control circuit driver pulse-width modulates (PWM) the low control circuit to ground.

The high pressure mechanical fuel pump is driven by three lobes on the camshaft. The ECM uses the camshaft and crankshaft position sensor inputs to synchronize the high pressure fuel pump actuator with the position of each of the camshaft lobes. The ECM regulates fuel pressure by adjusting the portion of each pump stroke that provides fuel to the rail.

The ECM monitors the fuel rail pressure sensor and the high pressure fuel pump actuator to determine if the commanded and actual pressure are within a predetermined range, or if the amount of fuel pressure correction exceeds a calibrated pressure.

  1. DTC P0090, P0091, P0092, P0191, P0192, or P0193 is not set.
  2. The ignition voltage is less than 18 V.
  3. The deceleration fuel cut-off (DFCO) is inactive.
  4. The engine speed is greater than 25 RPM.
  5. The air bag is not deployed.
  6. DTCs P0087, P0088, and P0089 run continuously when the above conditions are met for 5 seconds.

P0087

The actual fuel rail pressure is 1.5 MPa (218 psi) less than the desired fuel pressure. The condition exists for greater than 5 seconds.

P0088

The actual fuel rail pressure is 3.6 MPa (522 psi) greater than the desired fuel rail pressure. The condition exists for greater than 5 seconds.

P0089

The high pressure fuel pump actuator command necessary to maintain the desired fuel rail pressure is +/-2.5 MPa (363 psi) of the command expected by the controller. The condition exists for greater than 5 seconds.

  1. DTCs P0087, P0088, and P0089 are Type A DTCs.
  2. A message center or an indicator displays Reduced Engine Power.

DTCs P0087, P0088, and P0089 are Type A DTCs.

  1. A restricted fuel feed pipe between the fuel feed pipe fuel pressure sensor and the high pressure fuel pump may set a DTC.
  2. A condition with the fuel tank fuel pump module or the fuel pump flow control module may set a DTC.
  3. A skewed fuel rail pressure sensor or an intermittent condition in the fuel rail pressure sensor circuits may set a DTC.
  4. A leaking or restricted fuel injector may set a DTC.

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
  2. «Connector Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures)
  4. «Wiring Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

DTC Type Reference

Scan Tool Reference

Control Module References for scan tool information

  1. Observe the DTC information with a scan tool. DTC P029D, P02A1, P02A5, P02A9, P02AD, P02B1, P0627, P0628, P0629, P069E, or U0109 should not set. If a DTC is set refer to «Diagnostic Trouble Code (DTC) List - Vehicle»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-trouble-code-dtc-list) .
  2. Attempt to start and idle the engine.
  3. Observe the DTC information with a scan tool. DTCs P0087, P0088, and P0089 should not set.
  4. Engine idling, observe the Fuel Rail Pressure Sensor parameter with a scan tool. The pressure should be approximately 3.5-5.5 Mpa (508-798 psi).
  5. Command an increase and decrease in fuel rail pressure with a scan tool. Observe the scan tool Fuel Rail Pressure Sensor parameter. The Fuel Rail Pressure Sensor should increase or decrease with each commanded state.
  6. Operate the vehicle within the Conditions for Running the DTC to verify the DTC does not reset. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.
  1. Ignition ON, observe the scan tool fuel pump control module (FPCM) fuel line pressure sensor parameter. Command an increase in the fuel line pressure with a scan tool. Verify the fuel line pressure increases to greater than 410 kPa (60 psi) as commanded. If the less than the specified range, refer to «Fuel System Diagnosis»(/chevrolet/camaro/v-2009-2013/remont/testing-diagnostics/#engine-controls-and-fuel-36l-troubleshooting-diagnosis) .
  2. Remove the Q18 high pressure fuel pump assembly and visually inspect the lobes on the camshaft for unusual wear. If the lobes appear normal, replace the Q18 high pressure fuel pump assembly. If the lobes are worn, replace the camshaft.

Static Test

  1. Ignition OFF, disconnect the harness connector at the high pressure fuel pump.
  2. Test for 0.35-0.6 ohms at 20°C (68°F) between low control circuit terminal 1 and high control circuit terminal 2. If the resistance is less than 0.3 ohms or greater than 0.6 ohms, replace the high pressure fuel pump.
  3. Test for infinite resistance between each terminal and the high pressure fuel pump housing/case. If not the specified value, replace the high pressure fuel pump.

Dynamic Test

Engine idling, command the Fuel Pressure Control to Increase with a scan tool. The Fuel Rail Pressure Sensor parameter should increase with each command.

  1. If the Fuel Rail Pressure Sensor parameter does not increase with each command, replace the G18 high pressure fuel pump.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

  1. «Camshaft Removal - Left Side (LLT)»(/chevrolet/camaro/v-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle-1-of-3__camshaft-removal-left-side-llt)
  2. «Fuel Pump Replacement»(/chevrolet/camaro/v-2009-2013/remont/testing-diagnostics/#engine-controls-and-fuel-36l-repair-instructions)
  1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.
CircuitShort to GroundOpen/High ResistanceShort to VoltageSignal Performance
High Pressure Fuel Pump Actuator High ControlP0091P0090
High Pressure Fuel Pump Actuator Low ControlP0091P0090P0092

High pressure fuel is regulated by the high pressure fuel pump actuator, which is a part of the high pressure fuel pump. The high pressure fuel pump actuator is a solenoid valve. The ECM provides battery voltage on the actuator high control circuit and ground on the actuator low control circuit. Both circuits are controlled through output drivers within the ECM. When deactivated, both drivers are disabled. When activated, the high control circuit driver energizes the high pressure fuel pump actuator, and the low control circuit driver pulse-width modulates (PWM) the low control circuit to ground. The ECM monitors the voltage on the circuits to detect a failure.

  1. DTC P0641, P0642, or P0643 is not set.
  2. The ignition voltage is between 6-18 V.
  3. DTCs P0090, P0091, and P0092 run continuously when the conditions above are met for greater than 3 seconds.

P0090

  1. The high pressure fuel pump actuator voltage is between 2.7-4.5 V with the actuator commanded OFF.
  2. The above condition is present for greater than 5 seconds.

P0091

  1. The high pressure fuel pump actuator voltage is less than 2.7 V with the actuator commanded OFF.
  2. The above condition is present for greater than 5 seconds.

P0092

  1. The high pressure fuel pump actuator voltage is greater than 4.5 V with the actuator commanded ON.
  2. The above condition is present for greater than 5 seconds.
  1. DTCs P0090, P0091, and P0092 are Type A DTCs.
  2. A message center or an indicator displays Reduced Engine Power.

DTCs P0090, P0091, and P0092 are Type A DTCs.

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
  2. «Connector Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures)
  4. «Wiring Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

DTC Type Reference

Scan Tool Reference

Control Module References for scan tool information

  1. Engine idling, observe the Fuel Rail Pressure Sensor parameter with a scan tool. The pressure should be approximately 3.5-5.5 MPa (508-798 psi).
  2. Command an increase and decrease in fuel rail pressure with a scan tool. Observe the scan tool Fuel Rail Pressure Sensor parameter. The Fuel Rail Pressure Sensor should increase or decrease with each command.
  3. Operate the vehicle within the Conditions for Running the DTC to verify the DTC does not reset. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.
  1. Ignition OFF.
  2. Disconnect the harness connector at the high pressure Q18 fuel pump.
  3. Engine operating, verify that a test lamp flashes between the high pressure fuel pump actuator low control circuit terminal 1 and B+. If the test lamp is always ON, test the high pressure fuel pump actuator low control circuit for a short to ground. If the circuit tests normal, replace the ECM. If the test lamp is always OFF, test the high pressure fuel pump actuator low control circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the ECM.
  4. Ignition ON, verify that a test lamp illuminates between the high pressure fuel pump actuator high control circuit terminal 2 and ground. If the test lamp does not illuminate, test the high pressure fuel pump actuator high control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the ECM.
  5. If all circuits test normal, test or replace the high pressure Q18 fuel pump.

Static Test

  1. Ignition OFF, disconnect the harness connector at the high pressure fuel pump.
  2. Test for 0.35-0.6 ohms at 20°C (68°F) between low control circuit terminal 1 and high control circuit terminal 2. If the resistance is less than 0.3 ohms or greater than 0.6 ohms, replace the high pressure fuel pump.
  3. Test for infinite resistance between each terminal and the high pressure fuel pump housing/case. If not the specified value, replace the high pressure fuel pump.

Engine idling, command the Fuel Pressure Control to Increase with a scan tool. The Fuel Rail Pressure Sensor parameter should increase with each command.

  1. If the Fuel Rail Pressure Sensor parameter does not increase with each command, replace the G18 high pressure fuel pump.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

  1. «Control Module References»(/chevrolet/camaro/v-2009-2013/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for ECM replacement, setup, and programming
  2. «Fuel Pump Replacement»(/chevrolet/camaro/v-2009-2013/remont/testing-diagnostics/#engine-controls-and-fuel-36l-repair-instructions)
  1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.
CircuitShort to GroundHigh ResistanceOpenShort to VoltageSignal Performance
Ignition VoltageP0100P0100P0100P0101
MAF Sensor SignalP0100P0102P0100P0102P0101
Low ReferenceP0102P0100P0101

The mass air flow (MAF) sensor is located in the air intake duct. The MAF sensor is an airflow meter that measures the amount of air that enters the engine. The MAF sensor uses a hot film that is cooled by air flowing past the sensing film as air enters the engine. The amount of cooling is proportional to the amount of the air flow. As the air flow increases, more current is required in order to maintain the hot film at a constant temperature. The engine control module (ECM) uses the MAF sensor in order to provide the correct fuel delivery for all operating conditions.

  1. The engine is operating.
  2. The ignition voltage is greater than 10 volts.
  3. DTC P0100, P0102 and P0103 run continuously once the above conditions are met for 6 seconds.

P0100

  1. The ECM detects that the MAF sensor signal is 0.0 Hz.
  2. The condition exists for 4 seconds or for a cumulative of 30 seconds.

P0102

  1. The ECM detects that the MAF sensor signal is less than 1135 Hz.
  2. The condition exists for 4 seconds or for a cumulative of 30 seconds.

P0103

  1. The ECM detects that the MAF sensor signal is greater than 15,152 Hz.
  2. The condition exists for 4 seconds or for a cumulative of 30 seconds.

DTCs P0100, P0102, and P0103 are Type B DTCs.

DTCs P0100, P0102, and P0103 are Type B DTCs.

  1. Inspect the harness of the MAF sensor to verify that it is not routed too close to the following components: The secondary ignition wires or coils Any solenoids Any relays Any motors
  2. Inspect the hydro-carbon (HC) filter, if equipped, in the air cleaner assembly for ruptures that would leak charcoal into the air intake, contaminating the sensing element.
  3. Inspect for any contamination, water intrusion, or debris on the sensing elements of the MAF sensor. If debris is present, clean the sensor. If the sensor cannot be cleaned, replace the sensor.
  4. A high resistance may cause a driveability concern before this DTC sets.

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
  2. «Connector Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures)
  4. «Wiring Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

DTC Type Reference

Scan Tool Reference

Control Module References for scan tool information

Special Tools

  1. J 38522: Variable Signal Generator
  2. For equivalent regional tools, refer to «Special Tools»(/chevrolet/camaro/v-2009-2013/remont/testing-diagnostics/#engine-controls-and-fuel-36l-special-tools-and-equipment) .
  1. Engine idling for 1 minute, observe the DTC information with a scan tool. DTCs P0100, P0102 and P0103 should not set.
  2. Verify restrictions do not exist in the exhaust system. Refer to «Restricted Exhaust»(/chevrolet/camaro/v-2009-2013/remont/exhaust/#engine-exhaust-system) .
  3. Engine idling, observe the scan tool MAF Sensor parameter. The reading should be between 1,650-3,500 Hz depending on the ECT.
  4. Use the scan tool and compare the MAF Sensor parameter to a known good vehicle under various operating conditions.
  5. Operate the vehicle within the Conditions for Running the DTC to verify the DTC does not reset. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.
  1. Verify the integrity of the entire air induction system by inspecting for the following conditions: Any damaged components Loose or improper installation An air flow restriction Any vacuum leak Water intrusion In cold climates, inspect for any snow or ice buildup The MAF sensor element for contamination If you find any of the above conditions, repair as necessary.
  2. Ignition OFF, disconnect the harness connector at the B75B MAF/IAT sensor.
  3. Ignition OFF, all vehicle systems OFF, this may take up to 2 min, test for less than 5 ohms between the ground circuit terminal 2 and ground. If greater than the specified range, test the ground circuit for an open/high resistance.
  4. Ignition ON, verify that a test lamp illuminates between the ignition circuit terminal 4 and ground. If the test lamp does not illuminate, test the ignition circuit for a short to ground or an open/high resistance. If the circuit tests normal and the ignition circuit fuse is open, test all the components connected to the ignition circuit and replace as necessary.
  5. Test for 4.8-5.2 V between the signal circuit terminal 5 and the ground circuit terminal 2. If less than the specified range, test the signal circuit for an open/high resistance or a short to ground. If the circuit/connections test normal, replace the K20 ECM. If greater than the specified range, test the signal circuit for a short to voltage. If the circuit/connections test normal, replace the K20 ECM.
  6. Ignition OFF, connect the red lead of the J 38522: Variable Signal Generator to the signal circuit terminal 5 at the B75B MAF sensor harness connector. Connect the battery voltage supply to B+, and the black lead to ground.
  7. Set the J 38522: Variable Signal Generator Signal switch to 5 V, the Frequency switch to 5 K, and the Duty Cycle switch to Normal.
  8. Engine at idle, observe the scan tool MAF Sensor frequency parameter. The parameter should be between 4,950-5,050 Hz. If not within the specified range, replace the K20 ECM.
  9. If all circuits/connections test normal, replace the B75B MAF sensor.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

  1. «Mass Airflow Sensor with Intake Air Temperature Sensor Replacement»(/chevrolet/camaro/v-2009-2013/remont/testing-diagnostics/#engine-controls-and-fuel-36l-repair-instructions)
  2. «Control Module References»(/chevrolet/camaro/v-2009-2013/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for ECM replacement, setup, and programming
  1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.
CircuitShort to GroundHigh ResistanceOpenShort to VoltageSignal Performance
Ignition VoltageP0100P0100P0100P0101
MAF Sensor SignalP0100P0102P0100P0102P0101
Low ReferenceP0102P0100P0101

The mass air flow (MAF) sensor is located in the air intake duct. The MAF sensor is an airflow meter that measures the amount of air that enters the engine. The MAF sensor uses a hot film that is cooled by air flowing past the sensing film as air enters the engine. The amount of cooling is proportional to the amount of the air flow. As the air flow increases, more current is required in order to maintain the hot film at a constant temperature. The engine control module (ECM) uses the MAF sensor in order to provide the correct fuel delivery for all operating conditions.

  1. Before the ECM can report DTC P0101 failed, DTCs P0010, P0011, P0013, P0014, P0020, P0021, P0023, P0024, P0100, P0102, P0103, P0111, P0112, P0113, P0121, P0122, P0123, P0221, P0222, P0223, P0335, P0336, P0338, P2088, P2089, P2090, P2091, P2092, P2093, P2094, P2095, P2227, P2228, or P2229 must run and pass.
  2. DTC P2176 is not set.
  3. The engine is operating for greater than 1 second.
  4. The MAF sensor signal is greater than 1.39 grams per second.
  5. The ignition voltage is greater than 10 volts.
  6. The engine coolant temperature (ECT) is greater than 10°C (50°F).
  7. The long term fuel trim is enabled.
  8. The throttle angle is steady +/-2 percent.
  9. The ECM detects greater than 150 revolutions of the crankshaft.
  10. DTC P0101 runs continuously once the above conditions are met.
  1. The ECM detects that the MAF sensor signal is greater or less than the calculated air flow based on engine load and engine speed. OR
  2. The ECM detects that the MAF sensor signal is greater or less than the calculated air flow, and The ECM detects a significant error in the long term fuel trim at cruising speed.

DTC P0101 is a Type B DTC.

DTC P0101 is a Type B DTC.

  1. Inspect the harness of the MAF sensor to verify that it is not routed too close to the following components: The secondary ignition wires or coils Any solenoids Any relays Any motors
  2. Any type of contamination on the MAF sensor heating elements will degrade the proper operation of the sensor. Certain types of contaminants act as a heat insulator, which will impair the response of the sensor to airflow changes. Water or snow can create the opposite effect, and cause the signal to increase rapidly.
  3. Inspect the hydro-carbon (HC) absorber in the air cleaner assembly for ruptures that would leak charcoal into the air intake, contaminating the sensing element.
  4. A steady or intermittent high resistance of 15 ohms or greater on the ignition 1 voltage circuit will cause the MAF sensor signal to be increased by as much as 60 g/s. To pinpoint this condition perform a voltage drop test on the circuit.
  5. Depending on the current ambient temperature, and the vehicle operating conditions, a MAF sensor signal circuit that is shorted to the IAT signal circuit will increase or decrease the MAF sensor signal that is interpreted by the ECM. Additionally it may cause a rapid fluctuation in the IAT Sensor parameter.
  6. A high resistance may cause a driveability concern before this DTC sets.
  7. A skewed or stuck engine coolant temperature (ECT) or IAT sensor will cause the calculated models to be inaccurate and may cause this DTC to run when it should not. Refer to «Temperature Versus Resistance»(/chevrolet/camaro/v-2009-2013/remont/testing-diagnostics/#engine-controls-and-fuel-62l-specifications__temperature-versus-resistance) .
  8. Certain aftermarket air filters may cause this DTC to set.
  9. Certain aftermarket air induction systems may cause this DTC to set.
  10. Modifications to the air induction system may cause this DTC to set.

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
  2. «Connector Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures)
  4. «Wiring Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

DTC Type Reference

Scan Tool Reference

Control Module References for scan tool information

Special Tools

  1. J 38522: Variable Signal Generator
  2. For equivalent regional tools, refer to «Special Tools»(/chevrolet/camaro/v-2009-2013/remont/testing-diagnostics/#engine-controls-and-fuel-36l-special-tools-and-equipment) .
  1. Engine idling for 1 minute, observe the DTC information with a scan tool. DTC P0101 should not set.
  2. Verify restrictions do not exist in the exhaust system. Refer to «Restricted Exhaust»(/chevrolet/camaro/v-2009-2013/remont/exhaust/#engine-exhaust-system) .
  3. Engine idling, observe the scan tool MAF Sensor parameter. The reading should be between 1,650-3,500 Hz depending on the ECT.
  4. Use the scan tool and compare the MAF Sensor parameter to a known good vehicle under various operating conditions.
  5. Operate the vehicle within the Conditions for Running the DTC to verify the DTC does not reset. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.
  1. Inspect for the following conditions: An engine vacuum leak An air leak in the intake air duct between the mass air flow (MAF) sensor and the throttle body A plugged or collapsed intake air duct Objects that block the MAF sensor air inlet An air filter element that is restricted The hydro-carbon absorber, if equipped, in the air cleaner assembly for ruptures or deterioration. A restricted throttle plate or for carbon build-up around the throttle plate An unseated engine oil dip stick A loose or missing engine oil fill cap An over filled crankcase If you find any of the above conditions, repair as necessary.
  2. Ignition OFF, disconnect the harness connector at the B75B MAF sensor.
  3. Ignition OFF, all vehicle systems OFF, this may take up to 2 min, test for less than 5 ohms between the ground circuit terminal 2 and ground. If greater than the specified range, test the ground circuit for an open/high resistance.
  4. Ignition ON, verify that a test lamp illuminates between the ignition circuit terminal 4 and ground. If the test lamp does not illuminate, test the ignition circuit for a short to ground or an open/high resistance. If the circuit tests normal and the ignition circuit fuse is open, test all the components connected to the ignition circuit and replace as necessary.
  5. Test for 4.8-5.2 V between the signal circuit terminal 5 and the ground circuit terminal 2. If less than the specified range, test the signal circuit for an open/high resistance or a short to ground. If the circuit/connections test normal, replace the K20 ECM. If greater than the specified range, test the signal circuit for a short to voltage. If the circuit/connections test normal, replace the K20 ECM.
  6. Ignition OFF, connect the red lead of the J 38522: Variable Signal Generator to the signal circuit terminal 5 at the B75 MAF sensor harness connector. Connect the battery voltage supply to B+, and ground the black lead.
  7. Set the J 38522: Variable Signal Generator Signal switch to 5 V, the Frequency switch to 5K, and the Duty Cycle switch to Normal.
  8. Engine at idle, observe the scan tool MAF Sensor frequency parameter. The parameter should be between 4,950-5,050 Hz. If not within the specified range, replace the K20 ECM.
  9. If all circuits/connections test normal, replace the B75B MAF sensor.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

  1. «Mass Airflow Sensor with Intake Air Temperature Sensor Replacement»(/chevrolet/camaro/v-2009-2013/remont/testing-diagnostics/#engine-controls-and-fuel-36l-repair-instructions)
  2. «Control Module References»(/chevrolet/camaro/v-2009-2013/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for ECM replacement, setup, and programming
  1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.
CircuitShort to GroundOpen/High ResistanceShort to VoltageSignal Performance
IAT Sensor SignalP0112P0111, P0113P0113*P0111
Low ReferenceP0111, P0113P0113*P0111
* Internal ECM or sensor damage may occur if the circuit is shorted to B+

Typical Scan Tool Data

CircuitShort to GroundOpenShort to Voltage
Operating Conditions: Engine operating in Closed Loop. Parameter Normal Range: -39 to +134°C (-38 to +274°F) Varies with ambient temperature.
IAT Sensor Signal135°C (275°F)40°C (-40°F)40°C (-40°F)*
Low Reference40°C (-40°F)40°C (-40°F)*
* Internal ECM or sensor damage may occur if the circuit is shorted to B+

IAT Sensor

The intake air temperature (IAT) sensor is an integral part of the mass air flow (MAF) sensor. The IAT sensor is a variable resistor that measures the temperature of the intake air. The engine control module (ECM) supplies 5 volts to the IAT signal circuit and supplies a ground to the low reference circuit.

The following table illustrates the difference between temperature, resistance, and voltage

IATIAT ResistanceIAT Signal Voltage
ColdHighHigh
WarmLowLow

P0111 Idle Test

  1. Before the ECM can report DTC P0111 failed, DTC P0101 must run and pass.
  2. DTC P0112, P0113, P0116, P0117, P0118, P0119, or P0128 is not set.
  3. The engine coolant temperature (ECT) at engine start is colder than 110°C (230°F).
  4. The ECT is warmer than 66°C (151°F).
  5. The vehicle speed is less than 11 km/h (7 mph).
  6. The MAF is less than 8 g/s.
  7. DTC P0111 runs continuously once the above conditions are met for approximately 300 seconds, depending on the drive cycle.

P0111 Cruise Test

  1. Before the ECM can report DTC P0111 failed, DTC P0101 must run and pass.
  2. DTC P0112, P0113, P0116, P0117, P0118, P0119, or P0128 is not set.
  3. The ECT at engine start is colder than 110°C (230°F).
  4. The vehicle speed is greater than 29 km/h (18 mph).
  5. The MAF is between 7-67 g/s.
  6. Decel fuel cut-off (DFCO) is not active.
  7. DTC P0111 runs continuously once the above conditions are met for approximately 300 seconds, depending on the drive cycle.

P0112 and P0113

  1. The vehicle speed is less than 3 mph.
  2. The ECT is warmer than -10°C (14°F).
  3. The MAF is less than 28 g/s.
  4. The DTCs runs continuously once the above conditions are met for greater than 2 seconds.

P0111

The ECM detects that the IAT remains steady within 2°C (4°F) during the idle test. Or, the ECM detects that the IAT decreased less than 2°C (4°F) during the cruise test. The condition exists for greater than 4 seconds or for a cumulative of 30 seconds.

P0112

The ECM detects that the IAT sensor voltage is greater than 4.87 volts for greater than 1 second or for a cumulative 10 seconds.

P0113

The ECM detects that the IAT sensor voltage is less than 0.21 volts for greater than 1 second or for a cumulative 10 seconds.

DTCs P0111, P0112, and P0113 are Type B DTCs.

DTCs P0111, P0112, and P0113 are Type B DTCs.

  1. If the vehicle has sat overnight, the IAT sensor and the ECT sensor values should display within 3°C (5°F).
  2. High resistance on either the IAT sensor signal circuit or the IAT sensor low reference circuit may set a DTC.

Schematic Reference

Connector End View Reference

Electrical Information Reference

  1. «Circuit Testing»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
  2. «Connector Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures)
  4. «Wiring Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

DTC Type Reference

Scan Tool Reference

Control Module References for scan tool information

  1. Engine idling, DTC P0111, P0112, or P0113 should not set.
  2. Operate the vehicle within the Conditions for Running the DTC to verify the DTC does not reset. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.
  1. Ignition OFF, disconnect the harness connector at the B75B MAF/IAT sensor.
  2. Ignition OFF, all vehicle systems OFF, this may take up to 2 min.
  3. Test for less than 5 ohms between the low reference circuit terminal 1 and ground. If greater than the specified range, test the low reference circuit for an open/high resistance, or for a short to voltage. If the circuit/connections test normal, replace the K20 ECM.
  4. Ignition ON, verify that the scan tool IAT sensor parameter is at -40°C (-40°F). If warmer than the specified value, test the signal circuit terminal 3 for a short to ground. If the circuit/connections test normal, replace the K20 ECM.
  5. Ignition ON, install a 3 A fused jumper wire between the signal circuit terminal 3 and ground. Verify the IAT sensor parameter is warmer than 134°C (274°F). If colder than the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the circuit/connections test normal, replace the K20 ECM.
  6. If all circuits/connections test normal, test or replace the B75B MAF/IAT sensor.
  1. Ignition OFF, disconnect the harness connector at the B75B MAF/IAT sensor.
  2. Test the IAT sensor by varying the sensor temperature while monitoring the sensor resistance. Compare the readings with the «Temperature Versus Resistance - Intake Air Temperature Sensor»(/chevrolet/camaro/v-2009-2013/remont/testing-diagnostics/#engine-controls-and-fuel-36l-specifications__temperature-versus-resistance-intake-air) table and verify that the resistance is within 5 % of the specification. If the not within the specified range, replace the B75B MAF/IAT sensor.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

  1. «Mass Airflow Sensor with Intake Air Temperature Sensor Replacement»(/chevrolet/camaro/v-2009-2013/remont/testing-diagnostics/#engine-controls-and-fuel-36l-repair-instructions)
  2. «Control Module References»(/chevrolet/camaro/v-2009-2013/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for ECM replacement, setup, and programming
  1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.
CircuitShort to GroundOpen/High ResistanceShort to VoltageSignal Performance
ECT Sensor SignalP0117P0118, P0119P0118, P0119*P0116*
Low ReferenceP0118, P0119P0118, P0119*P0116*
* Internal ECM or ECT sensor damage may occur if the circuit is shorted to B+
CircuitShort to GroundOpenShort to Voltage
Operating Conditions: Engine operating in Closed Loop. Parameter Normal Range: -39 to +142°C (-38 to +288°F) Varies with coolant temperature.
ECT Sensor Signal143°C (289°F)40°C (-40°F)40°C (-40°F)*
Low Reference40°C (-40°F)40°C (-40°F)*
* Internal ECM or ECT sensor damage may occur if the circuit is shorted to B+

ECT Sensor

The engine coolant temperature (ECT) sensor is a variable resistor that measures the temperature of the engine coolant. The engine control module (ECM) supplies 5 volts to the ECT signal circuit and supplies a ground to the low reference circuit. The ECM monitors the mutual performance of the ECT and the intake air temperature (IAT) signals. The ECM monitors the warm up and cool down behavior of the sensors, after a vehicle driven at operating temperature is shut down. If the ECM detects that the ECT is not with in a predetermined range of IAT after a long soak, or the ECT and IAT are not within a range of each other, as compared to a previous cold start, this DTC sets.

The following table illustrates the difference between temperature, resistance, and voltage

ECTECT ResistanceECT Signal Voltage
ColdHighHigh
WarmLowLow

Condition 1

  1. Before the ECM can report DTC P0116 failed, DTC P0101 must run and pass.
  2. DTC P0112, P0113, P0117, P0118, P0119, or P2610 is not set.
  3. The engine run time of the previous ignition cycle was greater than 10 minutes.
  4. The calculated engine cool down of the previous test was greater than 50°C (120°F).
  5. The ignition was OFF for greater than 330 minutes after the previous engine shut down.
  6. The accumulated air mass of the previous ignition cycle was greater than 6,000 grams.
  7. The DTC runs once an ignition cycle when the above conditions are met for greater than 35 seconds.

Condition 2

  1. Before the ECM can report DTC P0116 failed, DTC P0101 must run and pass.
  2. DTCs P0112, P0113, P0117, P0118, and P0119 are not set.
  3. The ECT at the previous engine shut down is greater than 82°C (180°F).
  4. The block heater is not detected.
  5. The ignition was OFF for greater than 330 minutes after the previous engine shut down.
  6. DTC runs once an ignition cycle when the above conditions are met.
  1. The ECM determines the difference between the ECT and IAT at ignition ON is not within 14°C (25°F) of the difference recorded during a previous ignition cycle, when the enable conditions were met. OR
  2. The ECM determines the IAT at ignition ON is within a calibrated range of the ECT and IAT recorded during a previous ignition cycle, but the ECT is not within 14°C (25°F) of the calibrated range.

DTC P0116 is a Type A/B DTC.

DTC P0116 is a Type A/B DTC.

  1. Test the ECT and the IAT sensor at various temperature levels in order to evaluate the possibility of a skewed sensor. A skewed sensor can result in a DTC or a driveability condition. Refer to «Temperature Versus Resistance - Engine Coolant Temperature Sensor»(/chevrolet/camaro/v-2009-2013/remont/testing-diagnostics/#engine-controls-and-fuel-36l-specifications__temperature-versus-resistance-engine-coolant) and «Temperature Versus Resistance - Intake Air Temperature Sensor»(/chevrolet/camaro/v-2009-2013/remont/testing-diagnostics/#engine-controls-and-fuel-36l-specifications__temperature-versus-resistance-intake-air) .
  2. If the vehicle has sat overnight, the IAT sensor and the ECT sensor values should display within 3°C (5°F).
  3. After starting a cold engine, the ECT sensor temperature should rise steadily, then stabilize after the thermostat opens.
  4. High resistance in the circuits of either the ECT or IAT sensor could set a DTC.
  5. A short to ground or voltage through a conductive material or fluid could set this DTC. Inspect the ECT sensor for evidence of engine coolant leaking into the connector body.

Schematic Reference

Connector End View Reference

Electrical Information Reference

  1. «Circuit Testing»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
  2. «Connector Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures)
  4. «Wiring Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

DTC Type Reference

Scan Tool Reference

Control Module References for scan tool information

  1. Verify that DTC P0117, P0118, or P0119 is not set. If any of the DTCs are set, refer to «Diagnostic Trouble Code (DTC) List - Vehicle»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-trouble-code-dtc-list) .
  2. Inspect the engine coolant level. Verify that the cooling system is operating correctly. If you suspect a condition with engine cooling system, refer to «Loss of Coolant»(/chevrolet/camaro/v-2009-2013/remont/cooling-system-mechanical/#engine-cooling-system__loss-of-coolant) .
  3. Ignition ON, verify the P0116 Freeze Frame Start Up ECT and the Start Up IAT parameters are within 14°C (25°F).
  4. Operate the vehicle within the Conditions for Running the DTC to verify the DTC does not reset. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.
  1. Ignition OFF, disconnect the harness connector at the B34 ECT sensor.
  2. Ignition OFF, remove the fuse that supplies B+ to circuit terminal 56 X2 of the K20 ECM.
  3. Test for less than 5 ohms between the low reference circuit terminal 2 and ground. If greater than the specified range, test the low reference circuit for an open/high resistance, or for a short to voltage. If the circuit tests normal, replace the K20 ECM.
  4. Install the fuse that supplies B+ to circuit terminal 56 X2 of the K20 ECM.
  5. Ignition ON, verify that the scan tool ECT sensor parameter is at -40°C (-40°F). If warmer than the specified value, test the signal circuit for a short to ground. If the circuit tests normal, replace the K20 ECM.
  6. Ignition ON, install a 3A fused jumper wire between the signal circuit terminal 1 and the low reference circuit terminal 2. Verify the ECT sensor parameter is greater than 142°C (288°F). If less than the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the K20 ECM.
  7. If all circuits test normal, test or replace the B34 ECT sensor.
  1. Ignition OFF, disconnect the harness connector at the B34 engine coolant temperature (ECT) sensor.
  2. Test the ECT sensor by varying the sensor temperature while monitoring the sensor resistance. Compare the readings with the «Temperature Versus Resistance - Engine Coolant Temperature Sensor»(/chevrolet/camaro/v-2009-2013/remont/testing-diagnostics/#engine-controls-and-fuel-36l-specifications__temperature-versus-resistance-engine-coolant) table and verify that the resistance is within 5 percent of the specification. If not within the specified range, replace the B34 ECT sensor.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

  1. «Engine Coolant Temperature Sensor Replacement»(/chevrolet/camaro/v-2009-2013/remont/testing-diagnostics/#engine-controls-and-fuel-36l-repair-instructions)
  2. «Control Module References»(/chevrolet/camaro/v-2009-2013/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for ECM replacement, setup, and programming
  1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.
CircuitShort to GroundOpen/High ResistanceShort to VoltageSignal Performance
ECT Sensor SignalP0117P0118, P0119P0118, P0119*P0116
Low ReferenceP0118, P0119P0118, P0119*P0116
* Sensor or ECM damage may occur if the circuit is shorted to B+
CircuitShort to GroundOpenShort to Voltage
Operating Conditions: Engine operating in Closed Loop. Parameter Normal Range: -39 to 142°C (-38 to 288°F) Varies with coolant temperature.
ECT Sensor Signal143°C (289°F)40°C (-40°F)40°C (-40°F)*
Low Reference40°C (-40°F)40°C (-40°F)*
* Internal ECM or ECT sensor damage may occur if the circuit is shorted to B+

ECT Sensor

The engine coolant temperature (ECT) sensor is a variable resistor that measures the temperature of the engine coolant. The engine control module (ECM) supplies 5 volts to the ECT signal circuit and supplies a ground to the low reference circuit.

The following table illustrates the difference between temperature, resistance, and voltage

ECTECT ResistanceECT Signal Voltage
ColdHighHigh
WarmLowLow

P0117

  1. The engine is operating.
  2. The start up intake air temperature (IAT) is less than 72°C (161°F).

OR

  1. The start up intake air temperature (IAT) is greater than 72°C (161°F).
  2. The engine run time is greater than 59 seconds.
  3. The DTC runs continuously once the above conditions are met.

P0118

  1. The ignition is ON or the engine is operating.
  2. The DTC runs continuously once the above condition is met.

P0117

The ECM detects that the ECT is greater than 140°C (284°F) for greater than 1 seconds or a cumulative of 10 seconds.

P0118

The ECM detects that the ECT is less than -39°C (-38°F) for greater than 1 seconds or a cumulative of 10 seconds.

DTC P0117 and P0118 are Type B DTCs.

DTC P0117 and P0118 are Type B DTCs.

  1. Test the ECT sensor at various temperature levels in order to evaluate the possibility of a skewed sensor. A skewed sensor can result in a DTC or a driveability condition. Refer to «Temperature Versus Resistance - Engine Coolant Temperature Sensor»(/chevrolet/camaro/v-2009-2013/remont/testing-diagnostics/#engine-controls-and-fuel-36l-specifications__temperature-versus-resistance-engine-coolant) .
  2. If the vehicle has sat overnight, the IAT sensor and the ECT sensor values should display within 3°C (5°F).
  3. After starting a cold engine, the ECT sensor temperature should rise steadily, then stabilize after the thermostat opens.
  4. High resistance in the circuits of either the ECT or IAT sensor could set a DTC.

Schematic Reference

Connector End View Reference

Electrical Information Reference

  1. «Circuit Testing»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
  2. «Connector Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures)
  4. «Wiring Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

DTC Type Reference

Scan Tool Reference

Control Module References for scan tool information

  1. Engine idling for 1 minute. Observe the DTC information with a scan tool. DTCs P0117 and P0118 should not set.
  2. Operate the vehicle within the Conditions for Running the DTC to verify the DTC does not reset. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.
  1. Ignition OFF, disconnect the harness connector at the B34 ECT sensor.
  2. Ignition OFF, remove the fuse that supplies B+ to circuit terminal 56 X2 of the K20 ECM.
  3. Test for less than 5 ohms between the low reference circuit terminal 2 and ground. If greater than the specified range, test the low reference circuit for an open/high resistance, or for a short to voltage. If the circuit tests normal, replace the K20 ECM.
  4. Install the fuse that supplies B+ to circuit terminal 56 X2 of the K20 ECM.
  5. Ignition ON, verify that the scan tool ECT sensor parameter is at -40°C (-40°F). If greater than the specified value, test the signal circuit terminal 1 for a short to ground. If the circuit tests normal, replace the K20 ECM.
  6. Ignition ON, install a 3A fused jumper wire between the signal circuit terminal 1 and the low reference circuit terminal 2. Verify the ECT sensor parameter is greater than 142°C (288°F). If less than the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the K20 ECM.
  7. If all circuits test normal, test or replace the B34 ECT sensor.
  1. Ignition OFF, disconnect the harness connector at the B34 engine coolant temperature (ECT) sensor.
  2. Test the ECT sensor by varying the sensor temperature while monitoring the sensor resistance. Compare the readings with the «Temperature Versus Resistance - Engine Coolant Temperature Sensor»(/chevrolet/camaro/v-2009-2013/remont/testing-diagnostics/#engine-controls-and-fuel-36l-specifications__temperature-versus-resistance-engine-coolant) table and verify that the resistance is within 5 percent of the specification. If not within the specified range, replace the B34 ECT sensor.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

  1. «Engine Coolant Temperature Sensor Replacement»(/chevrolet/camaro/v-2009-2013/remont/testing-diagnostics/#engine-controls-and-fuel-36l-repair-instructions)
  2. «Control Module References»(/chevrolet/camaro/v-2009-2013/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for ECM replacement, setup, and programming
  1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.
CircuitShort to GroundOpen/High ResistanceShort to VoltageSignal Performance
ECT Sensor SignalP0117P0116, P0118, P0119P0118*, P0119*P0116*
Low ReferenceP0116, P0118, P0119P0118*, P0119*P0116*
* Internal ECM or sensor damage may occur if the circuit is shorted to B+
CircuitShort to GroundOpenShort to Voltage
Operating Conditions: Engine operating in Closed Loop Parameter Normal Range: -39 to +142°C (-38 to +288°F) Varies with coolant temperature.
ECT Sensor Signal143°C (289°F)40°C (-40°F)40°C (-40°F)*
Low Reference40°C (-40°F)40°C (-40°F)*
* Internal ECM or ECT sensor damage may occur if the circuit is shorted to B+

ECT Sensor

The engine coolant temperature (ECT) sensor is a variable resistor that measures the temperature of the engine coolant. The engine control module (ECM) supplies 5 volts to the ECT signal circuit and supplies a ground to the low reference circuit. The ECM monitors the performance of the ECT sensor. If the ECM detects excessive noise or rapid fluctuations in the ECT signal, this DTC sets.

The following table illustrates the difference between temperature, resistance, and voltage

ECTECT ResistanceECT Signal Voltage
ColdHighHigh
WarmLowLow
  1. DTC P0117 or P0118 is not set.
  2. The ignition is ON or the engine is operating.
  3. DTC P0119 runs continuously once the above conditions are met.
  1. The ECM detects that the ECT changed ±5°C (±9°F) greater than the expected value during a calibrated amount of time.
  2. The condition exists for approximately 1 minute.

DTC P0119 is a Type B DTC.

DTC P0119 is a Type B DTC.

  1. Test the ECT sensor at various temperature levels in order to evaluate the possibility of a skewed sensor. A skewed sensor can result in a DTC or a driveability condition. Refer to «Temperature Versus Resistance - Engine Coolant Temperature Sensor»(/chevrolet/camaro/v-2009-2013/remont/testing-diagnostics/#engine-controls-and-fuel-36l-specifications__temperature-versus-resistance-engine-coolant) .
  2. If the vehicle has sat overnight, the IAT sensor and the ECT sensor values should display within 3°C (5°F).
  3. After starting a cold engine, the ECT sensor temperature should rise steadily, then stabilize after the thermostat opens.
  4. High resistance on either the ECT sensor signal circuit or the ECT sensor low reference circuit could set a DTC.

Schematic Reference

Connector End View Reference

Electrical Information Reference

  1. «Circuit Testing»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
  2. «Connector Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures)
  4. «Wiring Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

DTC Type Reference

Scan Tool Reference

Control Module References for scan tool information

  1. Observe the scan tool engine coolant temperature (ECT) sensor parameter, while moving the ECT sensor connector and the K20 ECM connector. The ECT sensor parameter should not fluctuate while moving the related harnesses and connectors. Repair the suspected harness or connection if the ECT parameter fluctuates greater than 3°C (5°F) while moving the related harnesses and connectors.
  2. Inspect the engine coolant level. Verify that the cooling system is operating correctly. If you suspect a condition with engine cooling system, refer to «Loss of Coolant»(/chevrolet/camaro/v-2009-2013/remont/cooling-system-mechanical/#engine-cooling-system__loss-of-coolant) .
  3. Operate the vehicle within the Conditions for Running the DTC to verify the DTC does not reset. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.
  1. Ignition OFF, disconnect the harness connector at the B34 ECT sensor.
  2. Ignition OFF, remove the fuse that supplies B+ to circuit terminal 56 X2 of the K20 ECM.
  3. Test for less than 5 ohms between the low reference circuit terminal 2 and ground. If greater than the specified range, test the low reference circuit for an open/high resistance, or for a short to voltage. If the circuit tests normal, replace the K20 ECM.
  4. Install the fuse that supplies B+ to circuit terminal 56 X2 of the K20 ECM.
  5. Ignition ON, verify that the scan tool ECT sensor parameter is at -40°C (-40°F). If warmer than the specified value, test the signal circuit terminal 1 for a short to ground. If the circuit tests normal, replace the K20 ECM.
  6. Ignition ON, install a 3A fused jumper wire between the signal circuit terminal 1 and the low reference circuit terminal 2. Verify the ECT sensor parameter is greater than 142°C (288°F). If less than the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the K20 ECM.
  7. If all circuits test normal, test or replace the B34 ECT sensor.
  1. Ignition OFF, disconnect the harness connector at the B34 engine coolant temperature (ECT) sensor.
  2. Test the ECT sensor by varying the sensor temperature while monitoring the sensor resistance. Compare the readings with the «Temperature Versus Resistance - Engine Coolant Temperature Sensor»(/chevrolet/camaro/v-2009-2013/remont/testing-diagnostics/#engine-controls-and-fuel-36l-specifications__temperature-versus-resistance-engine-coolant) table and verify that the resistance is within 5 percent of the specification. If not within the specified range, replace the B34 ECT sensor.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

  1. «Engine Coolant Temperature Sensor Replacement»(/chevrolet/camaro/v-2009-2013/remont/testing-diagnostics/#engine-controls-and-fuel-36l-repair-instructions)
  2. «Control Module References»(/chevrolet/camaro/v-2009-2013/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for ECM replacement, setup, and programming
  1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.
CircuitShort to GroundOpen/High ResistanceShort to VoltageSignal Performance
5-Volt ReferenceP0122, P0222, P0698P0121, P0122, P0221, P0222, P0697, P2119, P2101P0123, P0223, P0699, P2101, P2119P0121, P0221, P0697, P0698, P0699
TP Sensor Signal 1P0122P0121, P0122, P2101, P2119P0123P0121, P0221, P2119
TP Sensor Signal 2P0222P0221, P0223P0223, P0638, P2128, P2138P0221
Low ReferenceP0121, P0123, P0221, P0223, P2119, P2100P0123, P0223*P0121, P0221
* Internal ECM or TP sensor damage may occur if the circuit is shorted to B+
CircuitShort to GroundOpenShort to Voltage
Operating Conditions: The engine is operating in closed loop Parameter Normal Range: TP Position Sensor 5%/4.2 V
5-Volt Reference124%/0.0 V7%/0.0 V113%/TP 1 4.98, TP 2, 4.50 V
TP Sensor Signal 14%/0.00 V7%/0.00 V7%/0.00 V
TP Sensor Signal 24%/0.00 V4%/4.98 V27%/4.98 V
Low Reference0%/4.98 V

TP Sensor

The throttle body assembly contains 2 throttle position (TP) sensors. The TP sensors are mounted to the throttle body assembly and are not serviceable. The TP sensors provide a signal voltage that changes relative to throttle blade angle. The engine control module (ECM) supplies the TP sensors with a common 5-volt reference circuit, a common low reference circuit, and two independent signal circuits. The TP sensors have opposite functionality. TP sensor 1 signal voltage decreases from greater than 4 volts at idle to less than 1 volt at wide open throttle (WOT). TP sensor 2 signal voltage increases from less than 1 volt at idle to greater than 4 volts at WOT.

  1. The ignition is ON, with the engine OFF, or the engine is operating.
  2. The ignition voltage is greater than 7 volts.
  3. DTC P0121 runs continuously once the above conditions are met.

P0121

The ECM detects TP sensor 1 disagrees greater than 9 percent from TP sensor 2 for greater than 1 second.

P0122

The ECM detects the TP sensor 1 signal voltage is less than 0.18 volt for greater than 1 second.

P0123

The ECM detects the TP sensor 1 signal voltage is greater than 4.6 volts for greater than 1 second.

P0221

The TP sensor 2 disagrees greater than 9 percent from TP sensor 1 for greater than 1 second.

P0222

The ECM detects the TP sensor 2 signal voltage is less than 0.16 vol for greater than 1 second.

P0223

The ECM detects the TP sensor 2 signal voltage is greater than 4.9 volts for greater than 1 second.

  1. DTCs P0121 and P0221 are Type B DTCs.
  2. DTCs P0122, P0123, P0222, and P0223 are Type A DTCs.
  1. DTCs P0121 and P0221 are Type B DTCs.
  2. DTCs P0122, P0123, P0222, and P0223 are Type A DTCs.

If there is a condition with the TP sensors the ECM defaults to reduced power mode for the entire ignition cycle, even if the condition is corrected.

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
  2. «Connector Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures)
  4. «Wiring Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

DTC Type Reference

Scan Tool Reference

Control Module References for scan tool information

  1. Ignition ON, verify that DTC P0697, P0698, or P0699 is not set. If a DTC is set, refer to «DTC P0641-P0643, P0651-P0653, or P0697-P0699 (ECM)»(/chevrolet/camaro/v-2009-2013/remont/testing-diagnostics/#engine-controls-and-fuel-36l-dtc-p0627-through-p2544) .
  2. Clear the DTC Info with a scan tool.
  3. Start the engine, observe the scan tool TP Sensor 1 and 2 voltage parameters. TP sensor 1 should be between 0.17-4.6 V and TP sensor 2 should be between 0.15-4.8 V.
  4. Observe the scan tool TP sensor 1 and 2 parameters while performing the tests listed below. The TP sensor 1 and 2 parameter should display Agree. Rapidly depress the accelerator pedal from the rest position to the wide open throttle position (WOT) and release pedal. Repeat the procedure several times. Slowly depress the accelerator pedal to WOT and then slowly return the pedal to closed throttle. Repeat the procedure several times.
  5. Observe the DTC Information with a scan tool. DTCs P0121, P0122, P0123, P0221, P0222, and P0223 should not set.
  6. Operate the vehicle within the Conditions for Running the DTC to verify the DTC does not reset. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.
  1. Ignition OFF, disconnect the harness connector at Q38 throttle body.
  2. Ignition OFF, remove the fuse that supplies B+ to terminal 56 X2 of the K20 ECM.
  3. Test for less than 5 ohms between the low reference circuit terminal C and ground. If greater than the specified range, test the low reference circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the K20 ECM.
  4. Install fuse that supplies B+ to terminal 56 X2 of the K20 ECM.
  5. Ignition ON, test for 4.8-5.2 V between the 5-volt reference circuit terminal E and ground. If less than the specified range, test the circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K20 ECM. If greater than the specified range, test the circuit for a short to voltage. If the circuit tests normal, replace the K20 ECM.
  6. Ignition ON, verify that the scan tool TP sensor 1 voltage parameter is less than 0.3 V. If greater than the specified value, test the signal circuit terminal D for a short to voltage. If the circuit tests normal, replace the K20 ECM.
  7. Connect a 3 A fused jumper wire between the 5 volt reference circuit terminal E and the TP sensor 1 signal circuit terminal D. Verify the scan tool TP sensor 1 voltage parameter is greater than 4.89 V. If less than the specified value, test the signal circuit for an open/high resistance or for a short to ground. If the circuit tests normal, replace the K20 ECM.
  8. Verify the scan tool TP sensor 2 voltage parameter is greater than 4.97 V. If less than the specified value, test the signal circuit terminal F for a short to ground. If the circuit tests normal, replace the K20 ECM.
  9. Connect a 3 A fused jumper wire between the TP sensor 2 signal circuit terminal F and the low reference circuit terminal C. Verify the scan tool TP sensor 2 voltage parameter is less than 0.10 V. If greater than the specified value, test the signal circuit for an open/high resistance or for a short to voltage. If the circuit tests normal, replace the K20 ECM.
  10. If all circuits test normal, replace the Q38 throttle body assembly.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

  1. «Throttle Body Assembly Replacement»(/chevrolet/camaro/v-2009-2013/remont/testing-diagnostics/#engine-controls-and-fuel-36l-repair-instructions)
  2. «Control Module References»(/chevrolet/camaro/v-2009-2013/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for ECM replacement, setup, and programming
  1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

The engine control module (ECM) monitors the temperature of the engine coolant for engine control and as an enabling criteria for some diagnostics. The amount of air flow into an engine is proportional to the amount of heat an engine generates. The ECM monitors the amount of air flow into the engine to calculate engine coolant temperature (ECT). The ECM uses the calculated temperature to determine if the engine has warmed up to the closed loop temperature or to the thermostat regulating temperature. If the coolant temperature does not increase normally or does not reach the closed loop temperature, diagnostics that use the ECT as enabling criteria, may not run when expected.

P0128

  1. Before the ECM can report DTC P0128 failed, DTC P0117 and P0118 must run and pass.
  2. DTCs P0100, P0101, P0102, P0103, P0111, P0112, P0113, P0116, P0117, P0118, P0119, or P0700 is not set.
  3. The engine speed is greater than 760 RPM.
  4. The ECT is colder than 70°C (158°F) at start up.
  5. The vehicle speed is greater than 8 km/h (5 mph).
  6. The air flow coming into the engine has accumulated to greater than 1,000 grams.
  7. DTC P0128 runs continuously once the above conditions have been met for approximately 15 minutes. OR
  8. DTCs P0116, P0117, P0118, or P0119 is not set.
  9. The engine speed is greater than 25 RPM.
  10. The block heater is not detected.
  11. DTC P0128 runs continuously once the above conditions have been met for approximately 8 minutes

P0128

  1. The ECM detects that the actual engine coolant temperature is 11°C (20°F) colder than the calculated thermostat regulating temperature of 89°C (192°F), for greater than 4 seconds or for a cumulative of 30 seconds. OR
  2. The ECM detects that the actual engine coolant temperature is 10°C (18°F) colder than the calculated ECT for greater than 1 second or a cumulative of 10 seconds.

DTC P0128 is a Type B DTCs.

DTC P0128 is a Type B DTCs.

An engine that soaks for about 8 hours will help diagnosis the condition. After the cold soak, operate the vehicle at highway speeds for 20 minutes while monitoring the scan tool Calculated ECT - Thermostat parameter. If there is a condition, the calculated temperature will be 10°C (18°F) warmer than the actual engine coolant temperature.

Schematic Reference

Connector End View Reference

Electrical Information Reference

  1. «Circuit Testing»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
  2. «Connector Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures)
  4. «Wiring Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

DTC Type Reference

Scan Tool Reference

Control Module References for scan tool information

  1. Verify that the engine coolant level is correct. If the engine coolant is not at the correct level, refer to «Loss of Coolant»(/chevrolet/camaro/v-2009-2013/remont/cooling-system-mechanical/#engine-cooling-system__loss-of-coolant) .
  2. Verify that the engine coolant temperature is at the normal operating temperature. If the engine coolant temperature is colder than the normal operating temperature, refer to «Thermostat Diagnosis»(/chevrolet/camaro/v-2009-2013/remont/cooling-system-mechanical/#engine-cooling-system) .
  3. Operate the vehicle within the Conditions for Running the DTC to verify the DTC does not reset. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.
  1. Ignition OFF, disconnect the harness connector at the B34 ECT sensor.
  2. Ignition OFF, remove the fuse that supplies B+ to circuit terminal X2-56 of the K20 ECM.
  3. Test for less than 5 ohms between the low reference circuit terminal 2 and ground. If greater than specified value, test the circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the K20 ECM.
  4. Install the fuse that supplies B+ to circuit terminal X2-56 of the K20 ECM.
  5. Ignition ON, observe the scan tool the ECT sensor parameter. Verify that the ECT sensor parameter is at -40°C (-40°F). If warmer than the specified value, test the signal circuit for a short to ground. If the circuit/connections test normal, replace the K20 ECM.
  6. Install a 3 A fused jumper wire between the signal circuit terminal 1 and the low reference circuit terminal 2. Verify the scan tool ECT sensor parameter is warmer than 142°C (288°F). If colder than the specified value, test the signal circuit for an open/high resistance or for a short to voltage. If the circuit/connections test normal, replace the K20 ECM.
  7. If all circuits test normal, test or replace the B34 ECT sensor.
  1. Ignition OFF, disconnect the harness connector at the B34 ECT sensor.
  2. Test the ECT sensor by varying the sensor temperature while monitoring the sensor resistance. Compare the readings with the «Temperature Versus Resistance - Engine Coolant Temperature Sensor»(/chevrolet/camaro/v-2009-2013/remont/testing-diagnostics/#engine-controls-and-fuel-36l-specifications__temperature-versus-resistance-engine-coolant) table and verify that the resistance is within 5 % of the specification. If not within the specified range, replace the B34 ECT sensor.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

  1. «Engine Coolant Temperature Sensor Replacement»(/chevrolet/camaro/v-2009-2013/remont/testing-diagnostics/#engine-controls-and-fuel-36l-repair-instructions)
  2. «Control Module References»(/chevrolet/camaro/v-2009-2013/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for ECM replacement, setup, and programming
  1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

The engine control module (ECM) supplies a voltage near 450 mV between the heated oxygen sensor (HO2S) signal circuit and the low reference circuit. The HO2S varies the voltage over a range from about 1,000 mV when the exhaust is rich, down through about 10 mV when the exhaust is lean. The ECM monitors and stores the HO2S voltage information. The ECM evaluates the HO2S voltage samples in order to determine the amount of time that the HO2S voltage was out of range. Or, to detect if the HO2S signal voltage switches at the same rate at which the ECM is commanding the heater ON and OFF.

Condition 1 and 2

  1. Before the ECM can report that DTC P0130 or P0150 failed, DTCs P0030, P0031, P0032, P0050, P0051, P0052, P0133, P0135, P0153, and P0155 must run and pass.
  2. DTC P0201, P0202, P0203, P0204, P0205, P0206, P0261, P0262, P0264, P0265, P0267, P0268, P0270, P0271, P0273, P0274, P0276, P0277, P2146, P2149, P2152, P2155, P216A, or P216D is not set.
  3. The engine is greater than 240 RPM.
  4. The ignition voltage is greater than 10 V.
  5. The HO2S 1 heater duty cycle is greater than 90 % for greater than 5 s.
  6. The DTCs run continuously once the conditions above exist for greater than 60 s.

Condition 3

  1. Before the ECM can report that DTC P0130 or P0150 failed, DTCs P0030, P0031, P0032, P0050, P0051, P0052, P0133, P0135, P0153, and P0155 must run and pass.
  2. The engine is operating.
  3. The ignition voltage is greater than 10 V.
  4. The air flow into the engine has exceeded 10 grams.
  5. The HO2S 1 heater duty cycle is greater than 70 % or, the calculated exhaust gas temperature is warmer than 600°C (1,112°F).
  6. Closed loop fuel control is enabled.
  7. The evaporative emissions system (EVAP) is not performing an intrusive test.
  8. The DTCs run continuously once the conditions above exist for greater than 30 s.

Condition 1

The ECM detects that the HO2S 1 signal voltage increases to greater than 2 V within 4 mS of 4 out of 6 HO2S heater switch OFF samples.

Condition 2

The HO2S 1 voltage is between 520-1,150 mV and the corresponding HO2S 2 voltage is less than 100 mV.

Condition 3

The HO2S 1 voltage is between 60-400 mV and the corresponding HO2S 2 voltage is less than 500 mV.

DTCs P0130 and P0150 are Type B DTCs.

DTCs P0130 and P0150 are Type B DTCs.

  1. The HO2S 1 voltage should be between 350-550 mV with the ignition ON. If the voltage is greater than the specified value, there is a condition with the HO2S 1 circuits. If the voltage does not change after disconnecting the HO2S, the condition is between the sensor and the ECM. If the voltage is between 350-550 mV after disconnecting the sensor, the condition is with the HO2S 1.
  2. Inspect the HO2S 1 harness connector for water intrusion. Moisture in a connector may cause voltage to bleed to other circuits within the connector.

Schematic Reference

Connector End View Reference

Electrical Information Reference

  1. «Circuit Testing»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
  2. «Connector Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures)
  4. «Wiring Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

DTC Type Reference

Scan Tool Reference

Control Module References for scan tool information

  1. Ignition ON, observe the appropriate scan tool HO2S 1 voltage parameter. The HO2S 1 voltage parameter should be less than 1,025 mV.
  2. Operate the vehicle within the Conditions for Running the DTC to verify the DTC does not reset. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.
  1. Ignition OFF, disconnect the harness connector at the appropriate B52 HO2S.
  2. Ignition ON, verify that the scan tool HO2S 1 voltage parameter is between 350-500 mV. If greater than the specified range, test the signal circuit terminal B or 4 of the HO2S for a short to the heater circuit terminal E. If the circuit/connections test normal, replace the K20 ECM.
  3. If all circuits/connections test normal, replace the appropriate B52 HO2S.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

  1. «Heated Oxygen Sensor Replacement - Bank 1 Sensor 1»(/chevrolet/camaro/v-2009-2013/remont/testing-diagnostics/#engine-controls-and-fuel-36l-repair-instructions)
  2. «Heated Oxygen Sensor Replacement - Bank 2 Sensor 1»(/chevrolet/camaro/v-2009-2013/remont/testing-diagnostics/#engine-controls-and-fuel-36l-repair-instructions)
  3. «Control Module References»(/chevrolet/camaro/v-2009-2013/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for ECM replacement, setup, and programming
  1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.
CircuitShort to GroundOpen/High ResistanceShort to VoltageSignal Performance
HO2S Bank 1 Sensor 1 SignalP0131P0134, P0135P0132P0133, P2096, P2097
HO2S Bank 1 Sensor 2 SignalP0137P0140, P013AP0138P0140, P013A, P013E
HO2S Bank 2 Sensor 1 SignalP0151P0154, P0155P0152P0153, P2098, P2099
HO2S Bank 2 Sensor 2 SignalP0157P0160, P013CP0158P0160, P013C, P014A
HO2S Bank 1 Sensor 1 Low ReferenceP0134, P0135P0133, P2096, P2097
HO2S Bank 1 Sensor 2 Low ReferenceP0140, P013AP0140, P013A, P013E
HO2S Bank 2 Sensor 1 Low ReferenceP0154, P0155P0153, P2098, P2099
HO2S Bank 2 Sensor 2 Low ReferenceP0160, P013CP0160, P013C, P014A
CircuitShort to GroundOpenShort to Voltage
Operating Conditions: Engine operating in Closed Loop Parameter Normal Range: Fluctuates above and below 350-500 mV
Sensor Signal0-60 mV445-450 mV1275 mV
Low Reference445-480 mV1275 mV

HO2S 1 or 2

The heated oxygen sensors (HO2S) are used for fuel control and catalyst monitoring. Each HO2S compares the oxygen content of the surrounding air with the oxygen content of the exhaust stream. When the engine is started, the control module operates in an Open Loop mode, ignoring the HO2S signal voltage while calculating the air-to-fuel ratio. The control module supplies the HO2S with a reference, or bias voltage of about 450 mV. While the engine runs, the HO2S heats up and begins to generate a voltage within a range of 0-1,000 mV. This voltage will fluctuate above and below the bias voltage. Once sufficient HO2S voltage fluctuation is observed by the control module, Closed Loop is entered. The control module uses the HO2S voltage to determine the air-to-fuel ratio. An HO2S voltage that increases above bias voltage toward 1,000 mV indicates a rich fuel mixture. An HO2S voltage that decreases below bias voltage toward 0 mV indicates a lean fuel mixture.

The heating elements inside each HO2S heat the sensor to bring the sensor up to operating conditions faster. This allows the system to enter Closed Loop earlier and the control module to calculate the air-to-fuel ratio sooner.

Condition 1

  1. DTC P0201, P0202, P0203, P0204, P0205, P0206 P0261, P0262, P0264, P0265, P0267, P0268, P0270, P0271, P0273, P0274, P0276, P0277, P2146, P2149, P2152, P2155, P216A, or P216D is not set.
  2. The ignition voltage is greater than 10 V.
  3. The engine speed is greater than 240 RPM.
  4. The air flow into the engine is greater than 220 grams.
  5. The HO2S 1 heater duty cycle is greater than 90 % for greater than 5 s.
  6. The evaporative emissions system (EVAP) is not performing an intrusive test.
  7. The ECM is not commanding the air/fuel mixture lean.
  8. DTC P0131 and P0151 run continuously once the conditions above exist for greater than 5 s.

Condition 2

  1. DTC P0116, P0117, P0118, P0119, P0201, P0202, P0203, P0204, P0205, P0206 P0261, P0262, P0264, P0265, P0267, P0268, P0270, P0271, P0273, P0274, P0276, P0277, P2146, P2149, P2152, P2155, P216A, or P216D is not set.
  2. The ignition voltage is greater than 10 V.
  3. The engine speed is greater than 240 RPM.
  4. The conditions for a cold start are present.
  5. The HO2S 1 heater duty cycle is greater than 90 % for greater than 5 s.
  6. DTC P0131 and P0151 run continuously once the conditions above exist.

The ECM detects that an HO2S 1 signal voltage is less than 60 mV while the corresponding HO2S 2 voltage is greater than 500 mV.

The ECM detects that an HO2S 1 signal voltage is less than 60 mV after a cold start.

DTCs P0131 and P0151 are Type B DTCs.

DTCs P0131 and P0151 are Type B DTCs.

Schematic Reference

Connector End View Reference

Electrical Information Reference

  1. «Circuit Testing»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
  2. «Connector Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures)
  4. «Wiring Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

DTC Type Reference

Scan Tool Reference

Control Module References for scan tool information

  1. Engine idling, observe the appropriate scan tool HO2S 1 voltage parameter. The voltage should fluctuate above and below the range of 350-550 mV.
  2. Operate the vehicle within the Conditions for Running the DTC to verify the DTC does not reset. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.
  1. Ignition OFF, disconnect the harness connector at the appropriate B52 HO2S.
  2. Ignition ON, verify that the scan tool HO2S 1 voltage parameter is between 350-500 mV. If less than the specified range, test the signal circuit terminal B or 4 for a short to ground. If the circuit/connections test normal, replace the K20 ECM. If greater than the specified range, test the signal circuit terminal B or 4 for a short to voltage. If the circuit/connections test normal, replace the K20 ECM.
  3. Install a 3 A fused jumper wire between the signal circuit terminal B or 4 and ground. Verify the HO2S voltage parameter is less than 60 mV. If greater than the specified range, test the signal circuit for an open/high resistance. If the circuit/connections test normal, replace the K20 ECM.
  4. Connect a 3 A fused jumper wire between the signal circuit terminal B or 4 and the low reference circuit terminal A or 3. Verify the HO2S voltage parameter is less than 60 mV. If greater than the specified range, test the low reference circuit for an open/high resistance or for a short to voltage. If the circuit/connections test normal, replace the K20 ECM.
  5. Verify that the following conditions do not exist: Lean condition. Low fuel system pressure-Refer to «Fuel System Diagnosis»(/chevrolet/camaro/v-2009-2013/remont/testing-diagnostics/#engine-controls-and-fuel-36l-troubleshooting-diagnosis) . Fuel that is contaminated-Refer to «Alcohol/Contaminants-in-Fuel Diagnosis (Special Tool)»(/chevrolet/camaro/v-2009-2013/remont/testing-diagnostics/#engine-controls-and-fuel-36l-troubleshooting-diagnosis) or «Alcohol/Contaminants-in-Fuel Diagnosis (Without Special Tool)»(/chevrolet/camaro/v-2009-2013/remont/testing-diagnostics/#engine-controls-and-fuel-36l-troubleshooting-diagnosis) . Exhaust leaks near the HO2S. Engine vacuum leaks. If you find any of the above conditions, repair as necessary.
  6. If all circuits/connections test normal, replace the appropriate B52 HO2S.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

  1. «Heated Oxygen Sensor Replacement - Bank 1 Sensor 1»(/chevrolet/camaro/v-2009-2013/remont/testing-diagnostics/#engine-controls-and-fuel-36l-repair-instructions)
  2. «Heated Oxygen Sensor Replacement - Bank 2 Sensor 1»(/chevrolet/camaro/v-2009-2013/remont/testing-diagnostics/#engine-controls-and-fuel-36l-repair-instructions)
  3. «Control Module References»(/chevrolet/camaro/v-2009-2013/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for ECM replacement, setup, and programming
  1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.
CircuitShort to GroundOpen/High ResistanceShort to VoltageSignal Performance
HO2S Bank 1 Sensor 1 SignalP0131P0134, P0135P0132P0133, P2096, P2097
HO2S Bank 1 Sensor 2 SignalP0137P0140, P013AP0138P0140, P013A, P013E
HO2S Bank 2 Sensor 1 SignalP0151P0154, P0155P0152P0153, P2098, P2099
HO2S Bank 2 Sensor 2 SignalP0157P0160, P013CP0158P0160, P013C, P014A
HO2S Bank 1 Sensor 1 Low ReferenceP0134, P0135P0133, P2096, P2097
HO2S Bank 1 Sensor 2 Low ReferenceP0140, P013AP0140, P013A, P013E
HO2S Bank 2 Sensor 1 Low ReferenceP0154, P0155P0153, P2098, P2099
HO2S Bank 2 Sensor 2 Low ReferenceP0160, P013CP0160, P013C, P014A
CircuitShort to GroundOpenShort to Voltage
Operating Conditions: Engine operating in Closed Loop Parameter Normal Range: Fluctuates above and below 350-500 mV
Sensor Signal0-60 mV445-450 mV1275 mV
Low Reference445-480 mV1275 mV

HO2S 1 or 2

The heated oxygen sensors (HO2S) are used for fuel control and catalyst monitoring. Each HO2S compares the oxygen content of the surrounding air with the oxygen content of the exhaust stream. When the engine is started, the control module operates in an Open Loop mode, ignoring the HO2S signal voltage while calculating the air-to-fuel ratio. The control module supplies the HO2S with a reference, or bias voltage of about 450 mV. While the engine runs, the HO2S heats up and begins to generate a voltage within a range of 0-1,000 mV. This voltage will fluctuate above and below the bias voltage. Once sufficient HO2S voltage fluctuation is observed by the control module, Closed Loop is entered. The control module uses the HO2S voltage to determine the air-to-fuel ratio. An HO2S voltage that increases above bias voltage toward 1,000 mV indicates a rich fuel mixture. An HO2S voltage that decreases below bias voltage toward 0 mV indicates a lean fuel mixture.

The heating elements inside each HO2S heat the sensor to bring the sensor up to operating conditions faster. This allows the system to enter Closed Loop earlier and the control module to calculate the air-to-fuel ratio sooner.

  1. DTC P0201, P0202, P0203, P0204, P0205, P0206 P0261, P0262, P0264, P0265, P0267, P0268, P0270, P0271, P0273, P0274, P0276, P0277, P2146, P2149, P2152, P2155, P216A, or P216D is not set.
  2. The ignition voltage is greater than 10 V.
  3. The engine speed is greater than 240 RPM.
  4. The HO2S 1 heater duty cycle is greater than 90 % for greater than 5 s.
  5. The ECM is not commanding the air/fuel mixture rich.
  6. DTC P0132 and P0152 run continuously once the conditions above exist for greater than 5 s.

The ECM detects that an HO2S 1 signal voltage is greater than 1,150 mV.

DTCs P0132 and P0152 are Type B DTCs.

DTCs P0132 and P0152 are Type B DTCs.

Schematic Reference

Connector End View Reference

Electrical Information Reference

  1. «Circuit Testing»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
  2. «Connector Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures)
  4. «Wiring Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

DTC Type Reference

Scan Tool Reference

Control Module References for scan tool information

  1. Engine idling, observe the appropriate scan tool HO2S 1 voltage parameter. The voltage should fluctuate above and below the range of 350-550 mV.
  2. Operate the vehicle within the Conditions for Running the DTC to verify the DTC does not reset. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.
  1. Ignition OFF, disconnect the harness connector at the appropriate B52 HO2S.
  2. Ignition ON, verify that the scan tool HO2S 1 voltage parameter is between 350-500 mV. If less than the specified range, test the signal circuit terminal B or 4 for a short to ground. If the circuit/connections test normal, replace the K20 ECM. If greater than the specified range, test the signal circuit terminal B or 4 for a short to voltage. If the circuit/connections test normal, replace the K20 ECM.
  3. Install a 3 A fused jumper wire between the signal circuit terminal B or 4 and ground. Verify the scan tool HO2S 1 voltage parameter is less than 60 mV. If greater than the specified range, test the signal circuit for an open/high resistance. If the circuit/connections test normal, replace the K20 ECM.
  4. Connect a 3 A fused jumper wire between the signal circuit terminal B or 4 and the low reference circuit terminal A or 3. Verify the scan tool HO2S 1 voltage parameter is less than 60 mV. If greater than the specified range, test the low reference circuit for an open/high resistance or for a short to voltage. If the circuit/connections test normal, replace the K20 ECM.
  5. Verify that the following conditions do not exist: Leaking fuel injectors. High fuel system pressure-Refer to «Fuel System Diagnosis»(/chevrolet/camaro/v-2009-2013/remont/testing-diagnostics/#engine-controls-and-fuel-36l-troubleshooting-diagnosis) . Fuel that is contaminated-Refer to «Alcohol/Contaminants-in-Fuel Diagnosis (Special Tool)»(/chevrolet/camaro/v-2009-2013/remont/testing-diagnostics/#engine-controls-and-fuel-36l-troubleshooting-diagnosis) or «Alcohol/Contaminants-in-Fuel Diagnosis (Without Special Tool)»(/chevrolet/camaro/v-2009-2013/remont/testing-diagnostics/#engine-controls-and-fuel-36l-troubleshooting-diagnosis) . Restricted exhaust. If you find any of the above conditions, repair as necessary.
  6. If all circuits/connections test normal, replace the appropriate B52 HO2S.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

  1. «Heated Oxygen Sensor Replacement - Bank 1 Sensor 1»(/chevrolet/camaro/v-2009-2013/remont/testing-diagnostics/#engine-controls-and-fuel-36l-repair-instructions)
  2. «Heated Oxygen Sensor Replacement - Bank 2 Sensor 1»(/chevrolet/camaro/v-2009-2013/remont/testing-diagnostics/#engine-controls-and-fuel-36l-repair-instructions)
  3. «Control Module References»(/chevrolet/camaro/v-2009-2013/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for ECM replacement, setup, and programming
  1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.
CircuitShort to GroundOpen/High ResistanceShort to VoltageSignal Performance
HO2S Bank 1 Sensor 1 SignalP0131P0134, P0135P0132P0133, P2096, P2097
HO2S Bank 1 Sensor 2 SignalP0137P0140P0138P0140
HO2S Bank 2 Sensor 1 SignalP0151P0154, P0155P0152P0153, P2098, P2099
HO2S Bank 2 Sensor 2 SignalP0157P0160P0158P0160
Low ReferenceP0134, P0135, P0154, P0155

The heated oxygen sensors (HO2S) are used for fuel control and catalyst monitoring. Each HO2S compares the oxygen content of the surrounding air with the oxygen content of the exhaust stream. When the engine is started, the control module operates in an Open Loop mode, ignoring the HO2S signal voltage while calculating the air-to-fuel ratio. The control module supplies the HO2S with a reference, or bias voltage of about 450 mV. While the engine runs, the HO2S heats up and begins to generate a voltage within a range of 0-1,000 mV. This voltage will fluctuate above and below the bias voltage. Once sufficient HO2S voltage fluctuation is observed by the control module, Closed Loop is entered. The control module uses the HO2S voltage to determine the air-to-fuel ratio. An HO2S voltage that increases above bias voltage toward 1,000 mV indicates a rich fuel mixture. An HO2S voltage that decreases below bias voltage toward 0 mV indicates a lean fuel mixture.

The heating elements inside each HO2S heat the sensor to bring the sensor up to operating conditions faster. This allows the system to enter Closed Loop earlier and the control module to calculate the air-to-fuel ratio sooner.

Conditions for Running the DTCs

  1. Before the ECM can report that DTC P0133 or P0153 failed, DTCs P0030, P0031, P0032, P0050, P0051, P0052, P0135, and P0155 must run and pass.
  2. DTC P0036, P0037, P0038, P0057, P0058, P0130, P0137, P0138, P0140, P0141, P0150, P0157, P0158, P0160, P0161, P0300, P0301, P0302, P0303, P0304, P0305, P0306, P0442, P0443, P0455, P0458, P0459, P2096, P2097, P2098, P2099, P2177, P2178, P2179, P2088, P2089, P2090, P2232, P2235, P2270, P2271, P2272, or P2273 is not set.
  3. The engine speed is 1,200-2,520 RPM.
  4. The closed loop fuel control is enabled.
  5. The engine load is 13-55 percent.
  6. The exhaust gas temperature is warmer than 350°C (662°F).
  7. The evaporative purge (EVAP) solenoid is commanded OFF, or is ON for greater than 10 seconds.
  8. DTC P0133 and P0153 run continuously once the conditions above exist.

Conditions for Setting the DTCs

The ECM determines that the length of time for an HO2S 1 to switch from lean to rich and back to lean, which is called a switching cycle, has exceeded a predetermined threshold. The condition exists for 3 cycles out of a 20 cycle test sample.

Action Taken when the DTCs Set

DTCs P0133 and P0153 are Type B DTCs.

Conditions for Clearing the MIL/DTCs

DTCs P0133 and P0153 are Type B DTCs.

Schematic Reference

Connector End View Reference

Electrical Information Reference

  1. «Circuit Testing»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
  2. «Connector Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures)
  4. «Wiring Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

DTC Type Reference

Scan Tool Reference

Control Module References for scan tool information

  1. Ignition ON, observe the scan tool DTC information. Verify no other DTC is not set. If any other DTCs are set, refer to «Diagnostic Trouble Code (DTC) List - Vehicle»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-trouble-code-dtc-list) .
  2. Engine idling, observe the scan tool HO2S 1 voltage parameter. The voltage should fluctuate above and below the range of 350-550 mV.
  3. Observe the DTC information with a scan tool. DTCs P0133 and P0153 should not set.
  4. Operate the vehicle within the Conditions for Running the DTC to verify the DTC does not reset. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.
  1. Verify that none of the following conditions exist: Lean or rich fuel injectors-Refer to «Fuel Injector Solenoid Coil Test»(/chevrolet/camaro/v-2009-2013/remont/testing-diagnostics/#engine-controls-and-fuel-36l-troubleshooting-diagnosis) . Water intrusion in the HO2S harness connector HO2S wiring harness damage Incorrect RTV sealant Low or high fuel system pressure-Refer to «Fuel System Diagnosis»(/chevrolet/camaro/v-2009-2013/remont/testing-diagnostics/#engine-controls-and-fuel-36l-troubleshooting-diagnosis) . Fuel that is contaminated-Refer to «Alcohol/Contaminants-in-Fuel Diagnosis (Special Tool)»(/chevrolet/camaro/v-2009-2013/remont/testing-diagnostics/#engine-controls-and-fuel-36l-troubleshooting-diagnosis) or «Alcohol/Contaminants-in-Fuel Diagnosis (Without Special Tool)»(/chevrolet/camaro/v-2009-2013/remont/testing-diagnostics/#engine-controls-and-fuel-36l-troubleshooting-diagnosis) . Fuel saturation of the evaporative emission (EVAP) canister Exhaust leaks near the HO2S Engine vacuum leaks Engine oil consumption Engine coolant consumption If you find any of the above conditions, repair as necessary.
  2. If all conditions test normal, replace the appropriate B52 HO2S.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

  1. «Heated Oxygen Sensor Replacement - Bank 1 Sensor 1»(/chevrolet/camaro/v-2009-2013/remont/testing-diagnostics/#engine-controls-and-fuel-36l-repair-instructions)
  2. «Heated Oxygen Sensor Replacement - Bank 2 Sensor 1»(/chevrolet/camaro/v-2009-2013/remont/testing-diagnostics/#engine-controls-and-fuel-36l-repair-instructions)
  3. «Control Module References»(/chevrolet/camaro/v-2009-2013/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for engine control module replacement, setup, and programming
  1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.
CircuitShort to GroundOpen/High ResistanceShort to VoltageSignal Performance
HO2S Bank 1 Sensor 1 SignalP0131P0134, P0135P0132P0133, P2096, P2097
HO2S Bank 1 Sensor 2 SignalP0137P0140, P013AP0138P0140, P013A, P013E
HO2S Bank 2 Sensor 1 SignalP0151P0154, P0155P0152P0153, P2098, P2099
HO2S Bank 2 Sensor 2 SignalP0157P0160, P013CP0158P0160, P013C, P014A
HO2S Bank 1 Sensor 1 Low ReferenceP0134, P0135P0133, P2096, P2097
HO2S Bank 1 Sensor 2 Low ReferenceP0140, P013AP0140, P013A, P013E
HO2S Bank 2 Sensor 1 Low ReferenceP0154, P0155P0153, P2098, P2099
HO2S Bank 2 Sensor 2 Low ReferenceP0160, P013CP0160, P013C, P014A
CircuitShort to GroundOpenShort to Voltage
Operating Conditions: Engine operating in Closed Loop Parameter Normal Range: Fluctuates above and below 350-500 mV
Sensor Signal0-60 mV445-450 mV1275 mV
Low Reference445-480 mV1275 mV

Bank 1 or 2 HO2S 1

The heated oxygen sensors (HO2S) are used for fuel control and catalyst monitoring. Each HO2S compares the oxygen content of the surrounding air with the oxygen content of the exhaust stream. When the engine is started, the control module operates in an Open Loop mode, ignoring the HO2S signal voltage while calculating the air-to-fuel ratio. The control module supplies the HO2S with a reference, or bias voltage of about 450 mV. While the engine runs, the HO2S heats up and begins to generate a voltage within a range of 0-1,000 mV. This voltage will fluctuate above and below the bias voltage. Once sufficient HO2S voltage fluctuation is observed by the control module, Closed Loop is entered. The control module uses the HO2S voltage to determine the air-to-fuel ratio. An HO2S voltage that increases above bias voltage toward 1,000 mV indicates a rich fuel mixture. An HO2S voltage that decreases below bias voltage toward 0 mV indicates a lean fuel mixture.

The heating elements inside each HO2S heat the sensor to bring the sensor up to operating conditions faster. This allows the system to enter Closed Loop earlier and the control module to calculate the air-to-fuel ratio sooner.

Condition 1

  1. DTC P0201, P0202, P0203, P0204, P0205, P0206, P0261, P0262, P0264, P0265, P0267, P0268, P0270, P0271, P0273, P0274, P0276, P0277, P2146, P2149, P2152, P2155, P216A, or P216D is not set.
  2. The ignition voltage is greater than 10 V.
  3. The engine speed is greater than 240 RPM.
  4. The HO2S 1 heater duty cycle is greater than 90 % for more than 5 s.
  5. DTCs P0134 and P0154 run continuously once the conditions above exist for greater than 10 s.

Condition 2

  1. DTC P0201, P0202, P0203, P0204, P0205, P0206, P0261, P0262, P0264, P0265, P0267, P0268, P0270, P0271, P0273, P0274, P0276, P0277, P2146, P2149, P2152, P2155, P216A, or P216D is not set.
  2. The ignition voltage is greater than 10 V.
  3. The engine speed is greater than 240 RPM.
  4. The HO2S 1 is warmed up for greater than 30 s.
  5. The HO2S 1 heater duty cycle is greater than 68 %.
  6. DTCs P0134 and P0154 run continuously once the conditions above exist.

Condition 3

  1. DTC P0201, P0202, P0203, P0204, P0205, P0206, P0261, P0262, P0264, P0265, P0267, P0268, P0270, P0271, P0273, P0274, P0276, P0277, P2146, P2149, P2152, P2155, P216A, or P216D is not set.
  2. The ignition voltage is greater than 10 V.
  3. The engine speed is greater than 240 RPM.
  4. The HO2S 1 is warmed up for greater than 30 s.
  5. The calculated exhaust temperature is warmer than 600°C (1,112°F).
  6. DTCs P0134 and P0154 run continuously once the conditions above exist.

The HO2S 1 signal voltage is between 400-520 mV, or 400-550 mV when the calculated exhaust temperature is warmer than 800°C (1,472°F).

The calculated internal resistance of the HO2S 1 is greater than 40,000 ohms when the calculated exhaust temperature is warmer than 600°C (1,112°F).

A corresponding HO2S 1 and HO2S 2 are greater than 200 mV during a decel fuel cut-off greater 3 s.

DTCs P0134 and P0154 are Type B DTCs.

DTCs P0134 and P0154 are Type B DTCs.

Schematic Reference

Connector End View Reference

Electrical Information Reference

  1. «Circuit Testing»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
  2. «Connector Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures)
  4. «Wiring Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

DTC Type Reference

Scan Tool Reference

Control Module References for scan tool information

  1. Engine idling, observe the appropriate scan tool HO2S voltage parameter. The voltage should fluctuate above and below the range of 350-550 mV.
  2. Operate the vehicle within the Conditions for Running the DTC to verify the DTC does not reset. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.
  1. Ignition OFF, disconnect the harness connector at the appropriate B52 HO2S.
  2. Ignition ON, verify that a test lamp illuminates between the ignition circuit terminal D or 1 and ground. If the test lamp does not illuminate, test the ignition circuit for a short to ground or an open/high resistance. If the circuit tests normal and the ignition circuit fuse is open, test all the components connected to the ignition circuit and replace as necessary.
  3. Ignition OFF, connect a test lamp between the heater control circuit terminal E or 2 and B+.
  4. Idle the engine, and verify the test lamp illuminates or flashes. If the test lamp is always OFF, test the heater control circuit for an open/high resistance. If the circuit/connections test normal, replace the K20 ECM.
  5. Ignition ON, verify that the appropriate scan tool HO2S voltage parameter is between 350-500 mV. If less than the specified range, test the signal circuit terminal B or 4 for a short to ground. If the circuit/connections test normal, replace the K20 ECM. If greater than the specified range, test the signal circuit terminal B or 4 for a short to voltage. If the circuit/connections test normal, replace the K20 ECM.
  6. Connect a 3 A fused jumper wire between the signal circuit terminal B or 4 and ground. Verify the scan tool HO2S voltage parameter is less than 60 mV. If greater than the specified range, test the signal circuit for an open/high resistance. If the circuit/connections test normal, replace the K20 ECM.
  7. Connect a 3 A fused jumper wire between the signal circuit terminal B or 4 and the low reference circuit terminal A or 3. Verify the scan tool HO2S voltage parameter is less than 60 mV. If greater than the specified range, test the low reference circuit for an open/high resistance or for a short to voltage. If the circuit/connections test normal, replace the K20 ECM.
  8. Verify that none of the following conditions exist: The HO2S is loose Lean or rich condition. Water intrusion in the HO2S harness connector Low or high fuel system pressure-Refer to «Fuel System Diagnosis»(/chevrolet/camaro/v-2009-2013/remont/testing-diagnostics/#engine-controls-and-fuel-36l-troubleshooting-diagnosis) . Fuel that is contaminated-Refer to «Alcohol/Contaminants-in-Fuel Diagnosis (Special Tool)»(/chevrolet/camaro/v-2009-2013/remont/testing-diagnostics/#engine-controls-and-fuel-36l-troubleshooting-diagnosis) or «Alcohol/Contaminants-in-Fuel Diagnosis (Without Special Tool)»(/chevrolet/camaro/v-2009-2013/remont/testing-diagnostics/#engine-controls-and-fuel-36l-troubleshooting-diagnosis) . Fuel saturation of the evaporative emission (EVAP) canister Exhaust leaks near the HO2S Engine vacuum leaks If you find any of the above conditions, repair as necessary.
  9. If all circuits/connections test normal, replace the appropriate B52 HO2S.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

  1. «Heated Oxygen Sensor Replacement - Bank 1 Sensor 1»(/chevrolet/camaro/v-2009-2013/remont/testing-diagnostics/#engine-controls-and-fuel-36l-repair-instructions)
  2. «Heated Oxygen Sensor Replacement - Bank 2 Sensor 1»(/chevrolet/camaro/v-2009-2013/remont/testing-diagnostics/#engine-controls-and-fuel-36l-repair-instructions)
  3. «Control Module References»(/chevrolet/camaro/v-2009-2013/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for ECM replacement, setup, and programming
  1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.
CircuitShort to GroundOpen/High ResistanceShort to VoltageSignal Performance
Ignition Voltage Supply - HO2S Bank 1 and 2 Sensor 1P0030, P0031, P0050, P0051P0050, P0051, P0134, P0135, P0154, P0155
Ignition Voltage Supply - HO2S Bank 1 and 2 Sensor 2P0036, P0037, P0056, P0057P0036, P0037, P0056, P0057, P0140, P0160
HO2S Bank 1 Sensor 1 Heater ControlP0031P0030, P0134P0032P0135
HO2S Bank 1 Sensor 2 Heater ControlP0037P0036, P0140P0038P0141
HO2S Bank 2 Sensor 1 Heater ControlP0051P0050, P0154P0052P0155
HO2S Bank 2 Sensor 2 Heater ControlP0057P0056, P0160P0058P0161

The heated oxygen sensor (HO2S) heater reduces the time required for the oxygen sensor to reach operating temperature and maintains the operating temperature during extended idle periods. When the ignition is turned to the ON position, ignition voltage is supplied directly to the sensor heater. The engine control module (ECM) controls the heater operation by first modulating the control circuit to ground when the sensors are cold. This prevents the possibility of thermal shock to the sensor, from condensation build-up on the sensor, by controlling the sensor's rate of heating. After a predetermined amount of time, the ECM commands the heaters ON continuously. Once the sensor reaches operating temperature, the ECM may modulate the heater control circuit to ground to maintain a desired temperature. The ECM controls the heater by grounding the control circuit with a solid state device called a driver. The driver is equipped with a feedback circuit that is pulled up to voltage. The ECM can determine if the control circuit is open, shorted to ground, or shorted to a voltage by monitoring the feedback voltage.

P0135 or P0155

  1. Before the ECM can report DTC P0135 or P0155 failed, P0030, P0031, P0032, P0050, P0051, and P0052 must run and pass.
  2. DTC P0130, P0131, P0132, P0134, P0150, P0151, P0152, or P0154 is not set.
  3. The engine speed is greater than 240 RPM.
  4. The ignition voltage is 10-18 V.
  5. The intake air temperature (IAT) is warmer than -30°C (-22°F).
  6. After the previous ignition cycle the engine OFF time was greater than 0 s.
  7. The calculated exhaust temperature is colder than 750°C (1,382°F).
  8. The engine is not in decel fuel cut-off (DFCO).
  9. The HO2S 1 is warmed up for greater than 10 s.
  10. The internal HO2S 1 resistance is less than 10,000 ohms.
  11. The HO2S 1 heater is enabled for greater than 120 s.
  12. DTCs P0135 and P0155 run continuously once the above conditions are met for approximately 100 s.

P0141 or P0161

  1. Before the ECM can report DTC P0141 or P0161 failed, DTCs P0036, P0037, P0038, P0056, P0057, and P0058 must run and pass.
  2. DTCs P0137, P0138, P0140, P0157, P0158, or P0160 are not set.
  3. The engine is operating.
  4. The ignition voltage is 10-18 V.
  5. The intake air temperature (IAT) is warmer than -30°C (-22°F).
  6. After the previous ignition cycle the engine OFF time was greater than 0 s.
  7. The calculated exhaust temperature is 300-700°C (572-1,292°F).
  8. The engine is not in decel fuel cut-off (DFCO).
  9. The internal HO2S 2 resistance is less than 10,000 ohms.
  10. The HO2S 2 heater is enabled for greater than 120 s.
  11. DTCs P0141 and P0161 run continuously once the above conditions are met for approximately 100 s.

P0135 or P0155

The ECM detects that the internal resistance of the HO2S 1 heater is not within the expected range for greater than 12 s.

P0141 or P0161

The ECM detects that the internal resistance of the HO2S 2 heater is not within the expected range for greater than 6 s.

DTCs P0135, P0141, P0155, and P0161 are Type B DTCs.

DTCs P0135, P0141, P0155, and P0161 are Type B DTCs.

Schematic Reference

Connector End View Reference

Electrical Information Reference

  1. «Circuit Testing»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
  2. «Connector Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures)
  4. «Wiring Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

DTC Type Reference

Scan Tool Reference

Control Module References for scan tool information

  1. Engine at normal operating temperature, operate the engine above 1,200 RPM for 2 min and then allow the engine to idle. DTCs P0135, P0141, P0155, or P0161 should not set.
  2. Operate the vehicle within the Conditions for Running the DTC to verify the DTC does not reset. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.
  1. Ignition OFF, disconnect the harness connector at the appropriate B52 HO2S.
  2. Ignition ON, test for B+ on the HO2S ignition voltage circuit terminal of the HO2S harness connector. HO2S bank 1 sensor 1 terminal D or 1 HO2S bank 2 sensor 1 terminal D or 1 HO2S bank 1 sensor 2 terminal C or 1 HO2S bank 2 sensor 2 terminal C or 1, with manual transmission HO2S bank 2 sensor 2 terminal D or 1, with automatic transmission If less than the specified value, repair the ignition voltage circuit of the HO2S heater for a short to ground or an open/high resistance.
  3. Ignition OFF, connect a test lamp between the heater control circuit terminal and B+. The test light should not illuminate. HO2S bank 1 sensor 1 terminal E or 2 HO2S bank 2 sensor 1 terminal E or 2 HO2S bank 1 sensor 2 terminal D or 2 HO2S bank 2 sensor 2 terminal D or 2, with manual transmission HO2S bank 2 sensor 2 terminal C or 1, with automatic transmission If the test lamp illuminates, test the heater control circuit for a short to ground. If the circuit/connections test normal, replace the K20 ECM.
  4. Idle the engine, verify the test lamp illuminates or flashes. If the test lamp is always OFF, test the control circuit for an open/high resistance. If the circuit/connections test normal, replace the K20 ECM.
  5. Ignition ON, test for 2.0-3.0 V between the control circuit terminal and ground. HO2S bank 1 sensor 1 terminal E or 2 HO2S bank 2 sensor 1 terminal E or 2 HO2S bank 1 sensor 2 terminal D or 2 HO2S bank 2 sensor 2 terminal D or 2, with manual transmission HO2S bank 2 sensor 2 terminal C or 1, with automatic transmission If not within the specified range, test the control circuit for a short to voltage. If the circuit/connections test normal, replace the K20 ECM.
  6. If all circuits/connections test normal, test or replace the appropriate B52 HO2S.
  1. Ignition OFF, disconnect the harness connector at the appropriate B52 HO2S.
  2. Test for 5-25 ohms between the appropriate control and the ignition terminals of the B52 HO2S. HO2S bank 1 sensor 1 terminal E or 2 and D or 1 HO2S bank 2 sensor 1 terminal E or 2 and D or 1 HO2S bank 1 sensor 2 terminal D or 2 and C or 1 HO2S bank 2 sensor 2 terminal D or 2 and C or 1, with manual transmission HO2S bank 2 sensor 2 terminal C or 1 and D or 1, with automatic transmission If not within the specified range, replace the B52 HO2S.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

  1. «Heated Oxygen Sensor Replacement - Bank 1 Sensor 1»(/chevrolet/camaro/v-2009-2013/remont/testing-diagnostics/#engine-controls-and-fuel-36l-repair-instructions)
  2. «Heated Oxygen Sensor Replacement - Bank 1 Sensor 2»(/chevrolet/camaro/v-2009-2013/remont/testing-diagnostics/#engine-controls-and-fuel-36l-repair-instructions)
  3. «Heated Oxygen Sensor Replacement - Bank 2 Sensor 1»(/chevrolet/camaro/v-2009-2013/remont/testing-diagnostics/#engine-controls-and-fuel-36l-repair-instructions)
  4. «Heated Oxygen Sensor Replacement - Bank 2 Sensor 2»(/chevrolet/camaro/v-2009-2013/remont/testing-diagnostics/#engine-controls-and-fuel-36l-repair-instructions)
  5. «Control Module References»(/chevrolet/camaro/v-2009-2013/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for ECM replacement, setup, and programming
  1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.
CircuitShort to GroundOpen/High ResistanceShort to VoltageSignal Performance
HO2S Bank 1 Sensor 1 SignalP0131P0134, P0135P0132P0133, P2096, P2097
HO2S Bank 1 Sensor 2 SignalP0137P0140, P013AP0138P0140, P013A, P013E
HO2S Bank 2 Sensor 1 SignalP0151P0154, P0155P0152P0153, P2098, P2099
HO2S Bank 2 Sensor 2 SignalP0157P0160, P013CP0158P0160, P013C, P014A
HO2S Bank 1 Sensor 1 Low ReferenceP0134, P0135P0133, P2096, P2097
HO2S Bank 1 Sensor 2 Low ReferenceP0140, P013AP0140, P013A, P013E
HO2S Bank 2 Sensor 1 Low ReferenceP0154, P0155P0153, P2098, P2099
HO2S Bank 2 Sensor 2 Low ReferenceP0160, P013CP0160, P013C, P014A
CircuitShort to GroundOpenShort to Voltage
Operating Conditions: Engine operating in Closed Loop. Parameter Normal Range: Fluctuates above and below 350-500 mV.
Sensor Signal0-60 mV400-455 mV1275 mV
Low Reference400-455 mV1275 mV

Bank 1 or 2 HO2S 2

The heated oxygen sensors (HO2S) are used for fuel control and catalyst monitoring. Each HO2S compares the oxygen content of the surrounding air with the oxygen content of the exhaust stream. When the engine is started, the control module operates in an Open Loop mode, ignoring the HO2S signal voltage while calculating the air-to-fuel ratio. The control module supplies the HO2S with a reference, or bias voltage of about 450 mV. While the engine runs, the HO2S heats up and begins to generate a voltage within a range of 0-1,000 mV. This voltage will fluctuate above and below the bias voltage. Once sufficient HO2S voltage fluctuation is observed by the control module, Closed Loop is entered. The control module uses the HO2S voltage to determine the air-to-fuel ratio. An HO2S voltage that increases above bias voltage toward 1,000 mV indicates a rich fuel mixture. An HO2S voltage that decreases below bias voltage toward 0 mV indicates a lean fuel mixture.

The heating elements inside each HO2S heat the sensor to bring the sensor up to operating conditions faster. This allows the system to enter Closed Loop earlier and the control module to calculate the air-to-fuel ratio sooner.

P0137 and P0157

  1. DTC P0036, P0037, P0038, P0056, P0057, P0058, P0116, P0117, P0118, P0119, or P0128 is not set.
  2. The engine speed is greater than 240 RPM.
  3. The ignition voltage is greater than 10 V.
  4. The engine coolant temperature is colder than 40°C (104°F) at start-up and the engine coolant temperature was warmer than 60°C (140°F) when the ignition was turned OFF last ignition cycle.
  5. The calculated exhaust temperature at the HO2S 2 is warmer than 700°C (1,292°F) and the HO2S 2 is warmed up for greater than 90 s.
  6. The calculated exhaust temperature is colder than 800°C (1472°F) 5 s after engine start.
  7. DTCs P0137 and P0157 run continuously once the above conditions are met.

P0138, P0140, P0158, and P0160

  1. The engine speed is greater than 240 RPM.
  2. The ignition voltage is greater than 10 V.
  3. The HO2S 2 heater duty cycle is stable and the HO2S 2 is warmed up for greater than 90 s.
  4. The calculated exhaust temperature is colder than 800°C (1472°F).
  5. DTCs P0138 and P0158 run continuously once the above conditions are met for greater than 5 s.
  6. DTCs P0140 and P0160 run continuously once the above conditions are met for greater than 60 s.

P0137 or P0157

The ECM detects the HO2S 2 signal voltage is less than 60 mV for greater than 1 s of for a cumulative of 10 s.

P0138 or P0158

The ECM detects the HO2S 2 signal voltage is greater than 1,150 mV for greater than 1 s or for a cumulative of 10 s.

P0140 or P0160

  1. The ECM detects that the HO2S 2 signal voltage is between 401-519 mV. OR
  2. The ECM detects that the measured internal resistance of the HO2S 2 is greater than 40,000 ohms, when the calculated exhaust temperature is warmer than 500°C (932°F).
  3. Either condition exists for greater than 1 s or for a cumulative of 10 s.

DTCs P0137, P0138, P0140, P0157, P0158, and P0160 are Type B DTCs.

DTCs P0137, P0138, P0140, P0157, P0158, and P0160 are Type B DTCs.

Schematic Reference

Connector End View Reference

Electrical Information Reference

  1. «Circuit Testing»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
  2. «Connector Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures)
  4. «Wiring Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

DTC Type Reference

Scan Tool Reference

Control Module References for scan tool information

  1. Engine idling, observe the appropriate scan tool HO2S 2 voltage parameter. The reading should fluctuate above and below the range of 401-519 mV.
  2. Operate the vehicle within the Conditions for Running the DTC to verify the DTC does not reset. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.
  1. Ignition OFF, disconnect the harness connector at the appropriate B52 HO2S.
  2. Ignition ON, verify that the scan tool HO2S 2 voltage parameter is between 400-520 mV. If less than the specified range, test the signal circuit terminal B or 4 for a short to ground. If the circuit/connections test normal, replace the K20 ECM. If greater than the specified range, test the signal circuit terminal B or 4 for a short to voltage. If the circuit/connections test normal, replace the K20 ECM.
  3. Connect a 3 A fused jumper wire between the signal circuit terminal B or 4 and ground. Verify the scan tool HO2S voltage parameter is less than 60 mV. If greater than the specified range, test the signal circuit for an open/high resistance. If the circuit/connections test normal, replace the K20 ECM.
  4. Connect a 3 A fused jumper wire between the signal circuit terminal B or 4 and the low reference circuit terminal A or 3. Verify the scan tool HO2S voltage parameter is less than 60 mV. If greater than the specified range, test the low reference circuit for an open/high resistance or for a short to voltage. If the circuit/connections test normal, replace the K20 ECM.
  5. Verify that the following conditions do not exist: Lean, rich, or leaking fuel injectors. A fuel pressure that is too low or too high-Refer to «Fuel System Diagnosis»(/chevrolet/camaro/v-2009-2013/remont/testing-diagnostics/#engine-controls-and-fuel-36l-troubleshooting-diagnosis) . Fuel that is contaminated-Refer to «Alcohol/Contaminants-in-Fuel Diagnosis (Special Tool)»(/chevrolet/camaro/v-2009-2013/remont/testing-diagnostics/#engine-controls-and-fuel-36l-troubleshooting-diagnosis) or «Alcohol/Contaminants-in-Fuel Diagnosis (Without Special Tool)»(/chevrolet/camaro/v-2009-2013/remont/testing-diagnostics/#engine-controls-and-fuel-36l-troubleshooting-diagnosis) . Evidence of water intrusion into the electrical connector of the HO2S The HO2S is loose Exhaust leaks near the HO2S Engine vacuum leaks If you find any of the above conditions, repair as necessary.
  6. If all circuits/connections test normal, replace the appropriate B52 HO2S.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

  1. «Heated Oxygen Sensor Replacement - Bank 1 Sensor 1»(/chevrolet/camaro/v-2009-2013/remont/testing-diagnostics/#engine-controls-and-fuel-36l-repair-instructions)
  2. «Heated Oxygen Sensor Replacement - Bank 2 Sensor 2»(/chevrolet/camaro/v-2009-2013/remont/testing-diagnostics/#engine-controls-and-fuel-36l-repair-instructions)
  3. «Control Module References»(/chevrolet/camaro/v-2009-2013/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for ECM replacement, setup, and programming
  1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.
CircuitShort to GroundOpen/High ResistanceShort to VoltageSignal Performance
HO2S Bank 1 Sensor 1 SignalP0131P0134, P0135P0132P0133, P2096, P2097
HO2S Bank 1 Sensor 2 SignalP0137P0140, P013AP0138P0140, P013A, P013E
HO2S Bank 2 Sensor 1 SignalP0151P0154, P0155P0152P0153, P2098, P2099
HO2S Bank 2 Sensor 2 SignalP0157P0160, P013CP0158P0160, P013C, P014A
HO2S Bank 1 Sensor 1 Low ReferenceP0134, P0135P0133, P2096, P2097
HO2S Bank 1 Sensor 2 Low ReferenceP0140, P013AP0140, P013A, P013E
HO2S Bank 2 Sensor 1 Low ReferenceP0154, P0155P0153, P2098, P2099
HO2S Bank 2 Sensor 2 Low ReferenceP0160, P013CP0160, P013C, P014A

The heated oxygen sensors (HO2S) are used for fuel control and catalyst monitoring. Each HO2S compares the oxygen content of the surrounding air with the oxygen content of the exhaust stream. When the engine is started, the control module operates in an Open Loop mode, ignoring the HO2S signal voltage while calculating the air-to-fuel ratio. The control module supplies the HO2S with a reference, or bias voltage of about 450 mV. While the engine runs, the HO2S heats up and begins to generate a voltage within a range of 0-1,000 mV. This voltage will fluctuate above and below the bias voltage. Once sufficient HO2S voltage fluctuation is observed by the control module, Closed Loop is entered. The control module uses the HO2S voltage to determine the air-to-fuel ratio. An HO2S voltage that increases above bias voltage toward 1,000 mV indicates a rich fuel mixture. An HO2S voltage that decreases below bias voltage toward 0 mV indicates a lean fuel mixture.

The heating elements inside each HO2S heat the sensor to bring the sensor up to operating conditions faster. This allows the system to enter Closed Loop earlier and the control module to calculate the air-to-fuel ratio sooner.

  1. Before the ECM can reports that DTC P013A, P013C, P013E, or P014A failed, DTCs P0030, P0031, P0032, P0050, P0051, P0052, P0135, and P0155 must run and pass.
  2. DTC P0036, P0037, P0038, P0056, P0057, P0058, P0137, P0138, P0140, P0141, P0157, P0158, P0160, P0161, P0300, P0301, P0302, P0303, P0304, P0305, P0306, P0442, P0443, P0455, P0458, P0459, P2096, P2097, P2098, P2099, P2177, P2178, P2179, P2088, P2089, P2090, P2232, P2235, P2270, P2271, P2272, or P2273 is not set.
  3. The ignition voltage is greater than 10 V.
  4. The HO2S 1 and 2 are in closed loop.
  5. The HO2S 2 resistance is less than 900 ohms.
  6. The HO2S 2 has switched from lean to rich during the ignition cycle.
  7. The calculated exhaust gas mass flow rate is greater than 2.22 g/s.
  8. The calculated exhaust temperature for HO2S 2 is warmer than 450°C (842°F).
  9. The HO2S 1 signal voltage is less than 141 mV
  10. The HO2S 2 signal voltage is greater than 590 mV at the beginning of decel fuel cut-off - DTC P013E and P014A only.
  11. The DTCs run continuously once the conditions above exist.

P013A or P013C

The ECM determines that the response time for the HO2S 2 to switch from greater than 400 mV to less than 200 mV is greater than 1 s. The condition exists for greater than 4 s or for a cumulative time of 30 s.

P013E or P014A

  1. The ECM determines the time for the HO2S 2 to transition from greater than 590 mV to less than 140 mV, during decel fuel cut-off is greater than 4 s. The condition exists for greater than 4 s or for a cumulative time of 30 s. OR
  2. The ECM determines that the air flow into the engine exceeded 15 grams before the HO2S 2 transitions to less than 140 mV, during decel fuel cut-off.

DTCs P013A, P013C, P013E, and P014A are Type B DTCs.

DTCs P013A, P013C, P013E, and P014A are Type B DTCs.

Schematic Reference

Connector End View Reference

Electrical Information Reference

  1. «Circuit Testing»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
  2. «Connector Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures)
  4. «Wiring Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

DTC Type Reference

Scan Tool Reference

Control Module References for scan tool information

  1. Ignition ON, observe the scan tool DTC information. Verify no other DTC is set. If any other DTC is set, refer to «Diagnostic Trouble Code (DTC) List - Vehicle»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-trouble-code-dtc-list) .
  2. Engine idling, observe the appropriate scan tool HO2S voltage parameter. The voltage should fluctuate above and below the range of 401-519 mV.
  3. Observe the DTC information with a scan tool. DTC P013A, P013C, P013E, and P014A should not set.
  4. Operate the vehicle within the Conditions for Running the DTC to verify the DTC does not reset. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.
  1. Ignition OFF, disconnect the harness connector at the appropriate B52 HO2S.
  2. Ignition ON, verify that the scan tool HO2S voltage parameter is between 400-520 mV. If less than the specified range, test the signal circuit terminal B or 4 for a short to ground. If the circuit/connections test normal, replace the K20 ECM. If greater than the specified range, test the signal circuit terminal B or 4 for a short to voltage. If the circuit/connections test normal, replace the K20 ECM.
  3. Connect a 3 A fused jumper wire between the signal circuit terminal B or 4 and ground. Verify the scan tool HO2S voltage parameter is less than 60 mV. If greater than the specified range, test the signal circuit for an open/high resistance. If the circuit/connections test normal, replace the K20 ECM.
  4. Connect a 3 A fused jumper wire between the signal circuit terminal B or 4 and the low reference circuit terminal A or 3. Verify the scan tool HO2S voltage parameter is less than 60 mV. If greater than the specified range, test the low reference circuit for an open/high resistance or for a short to voltage. If the circuit/connections test normal, replace the K20 ECM.
  5. Verify that none of the following conditions exist: Lean or rich condition. Water intrusion in the HO2S harness connector HO2S wiring harness damage Incorrect RTV sealant Low or high fuel system pressure-Refer to «Fuel System Diagnosis»(/chevrolet/camaro/v-2009-2013/remont/testing-diagnostics/#engine-controls-and-fuel-36l-troubleshooting-diagnosis) . Fuel that is contaminated-Refer to «Alcohol/Contaminants-in-Fuel Diagnosis (Special Tool)»(/chevrolet/camaro/v-2009-2013/remont/testing-diagnostics/#engine-controls-and-fuel-36l-troubleshooting-diagnosis) or «Alcohol/Contaminants-in-Fuel Diagnosis (Without Special Tool)»(/chevrolet/camaro/v-2009-2013/remont/testing-diagnostics/#engine-controls-and-fuel-36l-troubleshooting-diagnosis) . Fuel saturation of the evaporative emission (EVAP) canister Exhaust leaks near the HO2S Engine vacuum leaks Engine oil consumption-Refer to «Oil Consumption Diagnosis»(/chevrolet/camaro/v-2009-2013/remont/mechanical/#engine-mechanical-36l-diagnostic-information-and-procedures__oil-consumption-diagnosis) . Engine coolant consumption If you find any of the above conditions, repair as necessary.
  6. If all conditions test normal, replace the appropriate B52 HO2S.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

  1. «Heated Oxygen Sensor Replacement - Bank 1 Sensor 2»(/chevrolet/camaro/v-2009-2013/remont/testing-diagnostics/#engine-controls-and-fuel-36l-repair-instructions)
  2. «Heated Oxygen Sensor Replacement - Bank 2 Sensor 2»(/chevrolet/camaro/v-2009-2013/remont/testing-diagnostics/#engine-controls-and-fuel-36l-repair-instructions)
  3. «Control Module References»(/chevrolet/camaro/v-2009-2013/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for ECM replacement, setup, and programming
  1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.
CircuitShort to GroundOpen/High ResistanceShort to VoltageSignal Performance
5 V ReferenceP018C, P0641, P06A6P018CP018D, P0641, P06A6P06A6
SignalP018CP018B, P018CP018DP018B
Low ReferenceP0641, P06A6P06A6

The fuel pressure sensor is located on the fuel line. The fuel pressure sensor monitors the fuel pressure in the fuel line. The fuel pump control module monitors the voltage signal from the fuel pressure sensor.

  1. The engine is running.
  2. DTC P018C, P018D, P0231, P0232, P023F, P064A, P1255 or P06A6 are not active.
  3. DTC P0641 has not failed this ignition cycle.
  4. Fuel pump control is enabled and the fuel pump control state is normal.
  5. The engine has been running for at least 5 seconds.

The fuel pump control module does not detect a change in the fuel pressure of at least 30 kPa (4.4 psi) when the fuel pump is operating. The fuel pressure sensor performance diagnostic provides a means to detect fuel pressure sensor output that is stuck within the normal operating range of the sensor.

DTC P018B, P018C and P018D are Type A DTCs.

DTC P018B, P018C and P018D are Type A DTCs.

Using the Failure Records data may help locate an intermittent condition. If you cannot duplicate the DTC, the information in the Failure Records can help determine how many miles since the DTC set. The Fail Counter and Pass Counter can help determine how many ignition cycles that the diagnostic test reported a pass and/or a fail.

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
  2. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures)
  3. «Connector Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
  4. «Wiring Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

DTC Type Reference

Scan Tool Reference

Control Module References for scan tool information

Note. Verify that the fuel tank is not empty. Only perform this diagnostic if there is at least 2 gallons of fuel in the fuel tank. Clear the DTC, and start and run the engine. Verify that the DTC P018B resets before proceeding with the circuit system testing. If the DTC does not reset, refer to diagnostic aids.

  1. Ignition OFF, disconnect the harness connector at the B47 fuel pressure sensor.
  2. Ignition OFF, test for less than 1 ohms between the low reference circuit terminal 2 and ground. If greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the K27 fuel pump flow control module.
  3. Ignition ON, test for 4.8-5.2 V between the B47 fuel pressure sensor 5 V reference circuit terminal 3 and ground. If less than the specified range, test the 5 V reference circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K27 fuel pump flow control module. If greater than the specified range, test the 5 V reference circuit for a short to voltage. If the circuit tests normal, replace the K27 fuel pump flow control module.
  4. Verify the scan tool fuel pressure sensor voltage is less than 1 V. If greater than the specified range, test the signal circuit terminal 1 for a short to voltage. If the circuit tests normal, replace the K27 fuel pump flow control module.
  5. Install a 3 A fused jumper wire between the signal circuit terminal 1 and the 5 V reference circuit terminal 3. Verify the scan tool 5 V reference is greater than 4.8 V. If less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K27 fuel pump flow control module.
  6. If all circuits test normal, replace the B47 fuel pressure sensor.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

  1. «Fuel Pressure Sensor Replacement - Fuel Injection Fuel Rail»(/chevrolet/camaro/v-2009-2013/remont/testing-diagnostics/#engine-controls-and-fuel-36l-repair-instructions)
  2. «Control Module References»(/chevrolet/camaro/v-2009-2013/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for fuel pump control module replacement, setup, and programming
  1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.
CircuitShort to GroundOpen/High ResistanceShort to VoltageSignal Performance
5 V Reference VoltageP0193, P0642P0193P0193, P0643P0191
FRP Sensor SignalP0192P0193P0193P0191
Low ReferenceP0193P0193, P0643P0191

The fuel rail pressure (FRP) sensor detects fuel pressure within the fuel rail. The engine control module (ECM) provides a 5 V reference voltage on the 5 V reference circuit and ground on the low reference circuit. The ECM receives a varying signal voltage on the signal circuit. The ECM monitors the voltage on the FRP sensor circuits. When the fuel pressure is high, the signal voltage is high. When the fuel pressure is low, the signal voltage is low.

Condition 1

  1. The engine speed is greater than 25 RPM for greater than 31 seconds.
  2. DTC P0191 runs once an ignition cycle at engine start up when the condition has been met.

Condition 2 and 3

  1. The engine speed greater than 25 RPM for greater than 30 seconds.
  2. The engine coolant temperature (ECT) at the previous engine shut down was warmer than 72°C (162°F).
  3. The ECT at engine start is colder than 55°C (131°F).
  4. At engine start, if the ECT is warmer than the intake air temperature (IAT), then the IAT must be within 35°C (63°F) of the ECT.
  5. At engine start, if the IAT is warmer than the ECT, then the ECT must be within 10°C (18°F) of the IAT.
  6. The block heater, if equipped, is not active.
  7. The engine off time since the previous engine shut down is greater than 4.2 hours.
  8. DTC P0191 runs once an ignition cycle at engine start up when the above conditions have been met.

DTC P0087, P2187, or P2188 is set, and the fuel pressure at ignition ON is less than 120 kPa (17.4 psi) for greater than 4 seconds or for a cumulative of 30 seconds.

DTC P0088, P2177, or P2187 is set, and the fuel pressure at ignition ON is greater than 1500 kPa (218 psi) for greater than 4 seconds or for a cumulative of 30 seconds.

The fuel pressure at ignition ON is greater than 1500 kPa (218 psi) and a fuel pressure increase of greater than 385 kPa (56 psi) occurs during the fuel pump prime. The condition exists for greater than 4 seconds or for a cumulative of 30 seconds.

  1. DTC P0191 is a Type A DTC.
  2. A message center or an indicator may display Reduced Engine Power.

DTC P0191 is a Type A DTC.

A condition with the fuel tank module or the fuel pump control module (FPCM) may set this DTC.

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
  2. «Connector Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures)
  4. «Wiring Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

DTC Type Reference

Scan Tool Reference

Control Module References for scan tool information

  1. Observe the scan tool DTC information, verify DTC P0627, P0628, P0629, P069E or U0109 is not set. If any of the DTCs are set, refer to «Diagnostic Trouble Code (DTC) List - Vehicle»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-trouble-code-dtc-list) .
  2. Engine idling, observe the scan tool Fuel Rail Pressure Sensor parameter. The pressure should be approximately 3.5-5.5 Mpa (508-798 psi).
  3. Engine idling, the scan tool Fuel Rail Pressure Sensor should be close to the scan tool Desired Fuel Rail Pressure. As the engine speed increases, the Desired Fuel Rail Pressure and the Fuel Rail Pressure Sensor should closely match each other.
  4. Move related harnesses/connectors of the FRP sensor and verify the engine does not stumble, stall, or change engine speed. If the engine stumbles, stalls, or changes engine speed, test or repair the suspected harness or connection.
  5. Observe the DTC information with a scan tool, DTC P0191 should not set.
  6. Operate the vehicle within the Conditions for Running the DTC to verify the DTC does not reset. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.
  1. Ignition OFF, disconnect the multi-way harness connector X161 at the rear of the intake manifold.
  2. Remove the fuse that supplies B+ to terminal 56-X2 of the K20 ECM.
  3. Ignition OFF, test for less than 5 ohms between the low reference circuit terminal 5 and ground. If greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the K20 ECM.
  4. Install the fuse that supplies B+ to terminal 56-X2 of the K20 ECM.
  5. Ignition ON, test for 4.8-5.2 V between the 5 V reference circuit terminal 11 and ground. If less than the specified range, test the 5 V reference circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K20 ECM. If greater than the specified range, test the 5 V reference circuit for a short to voltage. If the circuit tests normal, replace the K20 ECM.
  6. Ignition ON, verify the scan tool Fuel Rail Pressure Sensor voltage parameter is greater than 4.96 V. If less than the specified value, test the signal circuit terminal 12 for a short to ground. If the circuit tests normal, replace the ECM.
  7. Connect a 3 A fused jumper wire between the signal circuit terminal 12 and the low reference circuit terminal 5. Verify the scan tool Fuel Rail Pressure Sensor voltage parameter transitions from greater than 4.96 V to less than 0.02 V. If the parameter does not transition from the maximum to minimum value, test the signal circuit for an open/high resistance or a short to voltage. If the circuit tests normal, replace the K20 ECM.
  8. Ignition OFF, remove the intake manifold.
  9. Connect the multi-way harness connector X161.
  10. Disconnect the B47 FRP sensor connector.
  11. Remove the fuse that supplies B+ to terminal 56-X2 of the K20 ECM.
  12. Ignition OFF, test for less than 5 ohms between the low reference circuit terminal 1 and ground. If greater than the specified range, test the low reference circuit for an open/high resistance.
  13. Install the fuse that supplies B+ to terminal 56-X2 of the K20 ECM.
  14. Ignition ON, test for 4.8-5.2 V between the 5 V reference circuit terminal 3 and ground. If less than the specified range, test the 5 V reference circuit for a short to ground or an open/high resistance. If greater than the specified range, test the 5 V reference circuit for a short to voltage.
  15. Ignition ON, verify the scan tool Fuel Rail Pressure Sensor voltage parameter is greater than 4.96 V. If less than the specified value, test the signal circuit terminal 2 for a short to ground.
  16. Connect a 3 A fused jumper wire between the signal circuit terminal 2 and the low reference circuit terminal 1. Verify the scan tool Fuel Rail Pressure Sensor voltage parameter transitions from greater than 4.96 V to less than 0.02 V. If the parameter does not transition from the maximum to the minimum value, test the signal circuit for an open/high resistance or a short to voltage.
  17. If all circuits test normal, replace the B47 FRP sensor.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

  1. «Fuel Pressure Sensor Replacement - Fuel Injection Fuel Rail»(/chevrolet/camaro/v-2009-2013/remont/testing-diagnostics/#engine-controls-and-fuel-36l-repair-instructions)
  2. «Control Module References»(/chevrolet/camaro/v-2009-2013/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for ECM replacement, setup, and programming

See also:
• Diagnostic System Check - Vehicle
• Strategy Based Diagnosis
• Diagnostic Procedure Instructions
• Control Module References
• Diagnostic Repair Verification
• Timing Chain Alignment Diagram
• Camshaft Timing Drive Components Cleaning and Inspection
• Engine Controls Schematics
• COMPONENT CONNECTOR END VIEWS - INDEX
• Camshaft Actuator System Description
• Circuit Testing
• Connector Repairs
• Testing for Intermittent Conditions and Poor Connections
• Wiring Repairs
• Special Tools
• Diagnostic Trouble Code (DTC) List - Vehicle
• Camshaft Position Actuator Replacement - Bank 1 (LF1 or LFW)
• Camshaft Position Actuator Solenoid Valve Solenoid Replacement - Bank 1 (Right Side) Intake
• Fuel System Diagnosis
• Camshaft Removal - Left Side (LLT)
• Air Intake System Description
• Restricted Exhaust
• Temperature Versus Resistance
• Temperature Versus Resistance - Intake Air Temperature Sensor
• Temperature Versus Resistance - Engine Coolant Temperature Sensor
• Loss of Coolant
• DTC P0641-P0643, P0651-P0653, or P0697-P0699 (ECM)
• Thermostat Diagnosis
• Oil Consumption Diagnosis

More articles — Engine Performance