Engine Controls and Fuel - 3.6l - DTC p0192 Through p0606/P062F Chevrolet Camaro V

Connector End View Reference

Description and Operation

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Electrical Information Reference

«Circuit Testing»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
«Connector Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
«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)
«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

Circuit/System Verification

Ignition ON, observe the DTC information with a scan tool, DTC P0641, P0642, or P0643 should not be 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) .
Engine idling, observe the DTC information with a scan tool. DTC P0192 or P0193 should not set.
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

Ignition OFF, disconnect the multi-way harness connector X161 at the rear of the intake manifold.
Remove the fuse that supplies B+ to terminal 56-X2 of the K20 ECM.
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.
Install the fuse that supplies B+ to terminal 56-X2 of the K20 ECM.
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.
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.
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.
Ignition OFF, remove the intake manifold.
Connect the multi-way harness connector X161.
Disconnect the B47 FRP sensor connector.
Remove the fuse that supplies B+ to terminal 56-X2 of the K20 ECM.
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.
Install the fuse that supplies B+ to terminal 56-X2 of the K20 ECM.
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.
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.
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.
If all circuits test normal, replace the B47 FRP sensor.

Repair Procedures

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

«Fuel Pressure Sensor Replacement - Fuel Injection Fuel Rail»(/chevrolet/camaro/v-2009-2013/remont/testing-diagnostics/#engine-controls-and-fuel-36l-repair-instructions)
«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

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.
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.
«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	Short to Ground	High Resistance	Open	Short to Voltage	Signal Performance
EOT Sensor Signal	P0198	P0196, P0197	P0197	P0197	P0196
EOT Low Reference		P0196, P0197	P0197		P0196

Typical Scan Tool Data

Circuit	Short to Ground	High Resistance	Short to Voltage
Operating Conditions: Engine running Parameter Normal Range: Varies with engine oil temperature
EOT Sensor Signal	172°C (341°F)	40°C (-40°F)	40°C (-40°F)
Low Reference		40°C (-40°F)	40°C (-40°F)

Engine Oil Temperature Sensor

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

Monitoring the engine oil temperature is necessary for optimal control of the cam actuators. The oil temperature is monitored from the dual function oil level switch and temperature sensor located in the oil pan.

P0196

The engine speed is greater than 25 RPM.
The engine oil temperature EOT is between -35 to +170°C (-31 to +338°F).
The DTC runs continuously when the above enable conditions are met for greater than 10 seconds.

P0197 and P0198

The ignition is ON, or the engine is operating.
The DTCs runs continuously when the above enable condition is met for greater than 2 seconds.

P0196

The ECM detects the actual EOT is 40°C (104°F) colder than the calculated EOT of the controller, for greater than 4 seconds or a cumulative time of 30 seconds.

P0197

The ECM detects the EOT is colder than -35°C (-31°F) for greater than 4 seconds or a cumulative time of 30 seconds.

P0198

The ECM detects the EOT is warmer than 170°C (331°F) for greater than 4 seconds or a cumulative time of 30 seconds.

DTCs P0197 and P0198 are Type B DTCs.

Conditions for Clearing the MIL/DTC

DTCs P0197 and P0198 are Type B DTCs.

Schematic Reference

Connector End View Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Electrical Information Reference

«Circuit Testing»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
«Connector Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
«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)
«Wiring Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

DTC Type Definitions

Scan Tool Reference

Control Module References for scan tool information

Engine operating, observe DTC information with a scan tool. DTCs P0196, P0197, or P0198 should not set.
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.

Ignition OFF, disconnect the harness connector at the EOT sensor.
Ignition OFF, remove the fuse that supplies B+ to circuit terminal 56 X2 of the ECM.
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 an open/high resistance. If the circuit tests normal, replace the ECM.
Install the fuse that supplies B+ to circuit terminal 56 X2 of the ECM.
Ignition ON, verify the scan tool Engine Oil temperature Sensor parameter is colder than -35°C (-31°F). If greater than the specified range, test the signal circuit terminal B for a short to ground. If the circuit tests normal, replace the ECM.
Connect a 3 A fused jumper wire between the signal circuit terminal B and the low reference circuit terminal C. Verify the scan tool EOT Sensor parameter is warmer than 171°C (340°F). If less than the specified range, test the signal circuit for a short to voltage or an open/high resistance, if the circuit tests normal, replace the ECM.
If all circuits test normal, replace the EOT/oil level sensor assembly.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for ECM replacement, setup, and programming

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.
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.
«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	Short to Ground	Open/High Resistance	Short to Voltage
Direct Fuel Injector High Voltage Supply Cylinder 1	P2146	P0201	P2146
Direct Fuel Injector High Voltage Control Cylinder 1	P0261	P0201	P0262
Direct Fuel Injector High Voltage Supply Cylinder 2	P2149, P216A	P0202	P2149, P216A
Direct Fuel Injector High Voltage Control Cylinder 2	P0264	P0202	P0265
Direct Fuel Injector High Voltage Supply Cylinder 3	P2152, P216D	P0203	P2152, P216D
Direct Fuel Injector High Voltage Control Cylinder 3	P0267	P0203	P0268
Direct Fuel Injector High Voltage Supply Cylinder 4	P2155	P0204	P2155
Direct Fuel Injector High Voltage Control Cylinder 4	P0270	P0204	P0271
Direct Fuel Injector High Voltage Supply Cylinder 5	P2149, P216A	P0205	P2149, P216A
Direct Fuel Injector High Voltage Control Cylinder 5	P0273	P0205	P0274
Direct Fuel Injector High Voltage Supply Cylinder 6	P2152, P216D	P0206	P2152, P216D
Direct Fuel Injector High Voltage Control Cylinder 6	P0276	P0206	P0277

The engine control module (ECM) supplies voltage to each fuel injector on the injector high voltage supply circuits. The ECM energizes each fuel injector by grounding the high voltage control circuit of the fuel injector. The ECM monitors the status of the injector high voltage supply circuits and the fuel injector high voltage control circuits. When a fuel injector circuit condition is detected by the ECM, the affected fuel injector(s) is disabled.

The engine speed is greater than 80 RPM.
The ignition 1 signal parameter is between 10-18 V.
The injector has been commanded ON and OFF at least once.
The DTCs run continuously once the above conditions are met.

P0201, P0202, P0203, P0204, P0205, or P0206

The ECM detects the injector high voltage supply circuit or the injector high voltage control circuit is open for greater than 4 seconds or for a cumulative of 30 seconds.

P0261, P0264, P0267, P0270, P0273, or P0276

The ECM detects the injector high voltage control circuit is shorted to ground for greater than 4 seconds or for a cumulative of 30 seconds.

P0262, P0265, P0268, P0271, P0274, or P0277

The ECM detects the injector high voltage control circuit is shorted to voltage for greater than 4 seconds or for a cumulative of 30 seconds.

P2146, P2149, P2152, P2155, P216A, or P216D

The ECM detects the injector high voltage supply circuit is shorted to ground or shorted to a voltage for greater than 4 seconds or for a cumulative of 30 seconds.

DTCs P0201, P0202, P0203, P0204, P0205, P0206, P0261, P0262, P0264, P0265, P0267, P0268, P0270, P0271, P0273, P0274, P0276, P0277, P2146, P2149, P2152, P2155, P216A, and P216D are Type B DTCs.

Diagnostic Aids

The high voltage supply circuits of injectors 2 and 5, and injectors 3 and 6, are paired together with a dual high side driver in the controller. A short to ground, or a short to voltage, on one of the paired circuits will set a DTC for the companion injector. The ECM will also disable the high side driver for the affected injectors.
The high voltage supply circuits of injectors 1 and 4 are not paired together in the controller.
Performing the fuel injector coil test may help isolate an intermittent condition. Refer to «Fuel Injector Solenoid Coil Test»(/chevrolet/camaro/v-2009-2013/remont/testing-diagnostics/#engine-controls-and-fuel-36l-troubleshooting-diagnosis) .
If the condition is intermittent, move the related harnesses and connectors, with the engine operating, while monitoring the scan tool Injector Control Circuit Test Status parameters. An Injector Control Circuit Test Status parameter will 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

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Electrical Information Reference

«Circuit Testing»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
«Connector Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
«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)
«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

Ignition ON, observe the DTC information. DTC P062B should not set. If DTC P062B failed this ignition, refer to «DTC P062B»(/chevrolet/camaro/v-2009-2013/remont/testing-diagnostics/#engine-controls-and-fuel-36l-dtc-p0627-through-p2544) .
Observe the scan tool Current Misfire Counter parameters. The Current Misfire Counters should not increment.
Engine operating, observe the appropriate scan tool Injector Control Circuit Test Status parameters. Verify the Injector Control Circuit Test Status parameters display OK or Not Run.
Engine operating, observe the DTC information with a scan tool. 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 should not set.
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.

Ignition ON, clear the scan tool DTC information.
Ignition OFF, disconnect the appropriate multi-way harness connector X160 or X161, at the rear of the intake manifold.
Connect a test lamp between ground and the high voltage supply circuit terminal of the appropriate injector listed below. Fuel Injector 1 terminal 8 X161 Fuel Injector 2 terminal 2 X160 Fuel Injector 3 terminal 9 X161 Fuel Injector 4 terminal 4 X160 Fuel Injector 5 terminal 10 X161 Fuel Injector 6 terminal 6 X160
Crank or start the engine while observing the test lamp. The test lamp should flash several times and then stop when the DTC sets. NOTE: Four of the injector high voltage supply circuits are paired in the controller with a dual driver. If the test lamp is always ON, test the high voltage supply circuit for a short to voltage. If the circuit tests normal, replace the ECM. If the test lamp is always OFF, test the high voltage supply circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the ECM.
Clear the DTC information with a scan tool, then cycle the ignition OFF.
Connect a test lamp between B+ and the high voltage control circuit terminal of the appropriate injector listed below. Fuel Injector 1 terminal 2 X161 Fuel Injector 2 terminal 1 X160 Fuel Injector 3 terminal 3 X161 Fuel Injector 4 terminal 3 X160 Fuel Injector 5 terminal 4 X161 Fuel Injector 6 terminal 5 X160
Ignition ON, the test lamp should not illuminate. If the test lamp is ON, test the high voltage control circuit for a short to ground. If the circuit tests normal, replace the ECM.
Connect a test lamp between ground and the high voltage control circuit terminal of the appropriate injector listed below. Fuel Injector 1 terminal 2 X161 Fuel Injector 2 terminal 1 X160 Fuel Injector 3 terminal 3 X161 Fuel Injector 4 terminal 3 X160 Fuel Injector 5 terminal 4 X161 Fuel Injector 6 terminal 5 X160
Ignition ON, the test lamp should not illuminate. If the test lamp is ON, test the high voltage control circuit for a short to voltage. If the circuit tests normal, replace the ECM.
Clear the DTC information with a scan tool, then cycle the ignition OFF.
Ignition OFF, connect a test lamp between the high voltage supply circuit terminal and the high voltage control circuit terminal of the appropriate injector listed below. Fuel Injector 1 terminal 8 and terminal 2 X161 Fuel Injector 2 terminal 2 and terminal 1 X160 Fuel Injector 3 terminal 9 and terminal 3 X161 Fuel Injector 4 terminal 4 and terminal 3 X160 Fuel Injector 5 terminal 10 and terminal 4 X161 Fuel Injector 6 terminal 6 and terminal 5 X160
Crank or start the engine while observing the test lamp. The test lamp should flash several times and then stop when the DTC sets. If the test lamp does not flash, test the high voltage control circuit for an open/high resistance. If the circuit tests normal, replace the ECM.
Ignition OFF, measure the resistance between the appropriate high voltage supply circuit and ground. The DMM should display OL ohms. If less than the specified range, test the high voltage supply circuit and the high voltage control circuit for a short to ground. If the circuits/connections test normal, test or replace the appropriate fuel injector(s).
Test for 1.5-2.5 ohms between the appropriate high voltage supply circuit and the high voltage control circuit. If less than the specified range, test for a short between the high voltage supply circuit and the high voltage control circuit. If the circuits/connections test normal, test or replace the appropriate fuel injector(s). If greater than the specified range, test the high voltage supply circuit and the high voltage control circuit for an open/high resistance. If the circuits/connections test normal, test or replace the appropriate fuel injector.

Component Testing

«Fuel Injector Solenoid Coil Test»(/chevrolet/camaro/v-2009-2013/remont/testing-diagnostics/#engine-controls-and-fuel-36l-troubleshooting-diagnosis)
«Fuel Injector Balance Test»(/chevrolet/camaro/v-2009-2013/remont/testing-diagnostics/#engine-controls-and-fuel-36l-troubleshooting-diagnosis)

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

«Fuel Injection Fuel Rail Assembly Replacement - Bank 1»(/chevrolet/camaro/v-2009-2013/remont/testing-diagnostics/#engine-controls-and-fuel-36l-repair-instructions)
«Fuel Injection Fuel Rail Assembly Replacement - Bank 2»(/chevrolet/camaro/v-2009-2013/remont/testing-diagnostics/#engine-controls-and-fuel-36l-repair-instructions)
«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

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.
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.
«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 DTC is used to indicate that the engine speed exceeded the fuel cutoff limit in gear. This DTC may set if the transmission is placed in a low gear while driving down a steep grade or traveling at a high speed.

The DTC is valid for manual transmissions only.
The engine is running.
Ignition voltage is between 10-18 volts.

Conditions for Setting the DTC

The ECM detects the engine speed is greater than 7,000 RPM for greater than 1 second.

DTC P0219 is a Type A DTC.

Note. This DTC is used for information only. This DTC does NOT indicate there is a condition with the crank sensor or the engine control module (ECM).

DTC P0219 is an informational DTC.

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.
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.
«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	Short to Ground	Open/High Resistance	Short to Voltage	Signal Performance
Control	P0231	P023F	P0232	P023F, P2635
Low Reference		P023F		P023F, P2635

The engine control module (ECM) supplies voltage to the fuel pump control module when the ECM detects that the ignition is on. The voltage from the ECM to the fuel pump control module remains active for 2 seconds, unless the engine is in crank or run. While this voltage is being received, the fuel pump control module supplies a varying voltage to the fuel tank pump module in order to maintain the desired fuel rail pressure.

P0231, P023F

The ignition voltage is between 9-18 V.

P0232

The control enable voltage signal supplied for the ECM to fuel pump control module is inactive for 4 seconds after engine has been shut off.

The fuel pump control module detects a fault on the fuel pump voltage circuit that is less than 11 V or greater than 18 V.

DTCs P0231, P0232, and P023F 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

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Electrical Information Reference

«Circuit Testing»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
«Connector Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
«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)
«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

Ignition ON, command the fuel pump ON and OFF using the scan tool ECM fuel pump output control. The fuel pump should turn ON and OFF.

Ignition OFF, disconnect the harness connector at the G12 fuel pump.
Connect a test lamp between the control circuit terminal 1 and ground.
Ignition ON, command the G12 fuel pump ON and OFF with a scan tool. The test lamp should turn ON and OFF, as commanded. If the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, replace the K27 fuel pump control module. If the test lamp is always OFF, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K27 fuel pump control module.
Ignition OFF, connect a test lamp between the control circuit terminal 1 and the low reference circuit terminal 2.
Ignition ON, command the G12 fuel pump ON with a scan tool. The test lamp should illuminate. If the test lamp does not illuminate, test the low reference circuit terminal 2 for a short to voltage or an open/high resistance. If the circuit tests normal, replace the K27 fuel pump control module.
If all circuits test normal, replace the G12 fuel pump.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

«Fuel Pump Replacement»(/chevrolet/camaro/v-2009-2013/remont/testing-diagnostics/#engine-controls-and-fuel-36l-repair-instructions)
«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

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.
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.
«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	Short to Ground	Open or High Resistance	Short to Voltage	Signal Performance
FPCM Control	P025A	P025A		P025A

The ignition is ON.

The serial data message from the ECM to the fuel pump control module does not agree with the state of the control enable voltage signal supplied from the ECM to the fuel pump control module for more than 2 seconds.

DTC P025A is a Type A DTC.

Schematic Reference

Connector End View Reference

Description and Operation

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Electrical Information Reference

«Circuit Testing»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
«Connector Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
«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)
«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

Ignition OFF, disconnect the harness connector at the K27 fuel pump control module.
Ignition OFF, connect a test lamp between the control circuit terminal 20 and ground.
Ignition ON, command the ECM fuel pump enable command ON and OFF with a scan tool. The test lamp should turn ON and OFF when changing between the commanded states. If the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, replace the K20 ECM. If the test lamp is always OFF, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K20 ECM.
If all circuits test normal, replace the K27 fuel pump control module.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for ECM or fuel pump control module replacement, setup, and programming

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.
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.
«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 injectors are mounted in the cylinder head beneath the intake ports and spray fuel directly into the combustion chamber. Direct injection requires high fuel pressure due to the fuel injector's location in the combustion chamber. High pressure fuel is regulated by the fuel rail pressure (FRP) regulator, which is a part of the high pressure fuel pump. The engine control module (ECM) monitors the actual fuel rail fuel pressure via the FRP sensor and commands the FRP regulator duty cycle in order to maintain the desired fuel rail pressure. If a fuel injector delivers more fuel than is needed misfire counts will accumulate on that cylinder, and the ECM will not be able to maintain the desired fuel rail pressure, indicating a stuck open or leaking fuel injector.

The engine speed is between 1,520-6,000 RPM
The engine load is less than 100 percent.
The misfire monitor is enabled.
DTCs P029D, P02A1, P02A5, P02A9, P02AD, and P02B1 run continuously once the conditions above have been met for approximately 20 seconds.

The ECM detects a specific cylinder misfire rate of greater than 100 counts in less than 17 engine revolutions, and P0087 is set. The condition exists for greater than 4 seconds or for a cumulative of 30 seconds.

DTCs P029D, P02A1, P02A5, P02A9, P02AD, and P02B1 are Type A DTCs.
The control module commands the engine to operate in the Reduced Engine Power mode.
The message center displays Reduced Engine Power.

DTCs P029D, P02A1, P02A5, P02A9, P02AD, and P02B1 are Type A DTCs.

A fuel injector leak into the combustion chamber may result in mechanical damage to the cylinder.

Schematic Reference

Connector End View Reference

Description and Operation

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Electrical Information Reference

«Circuit Testing»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
«Connector Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
«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)
«Wiring Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

DTC Type Reference

Clear the DTC information with a scan tool.
Engine operating, raise the engine speed to 2,000 RPM. Observe the DTC information with a scan tool. DTC P029D, P02A1, P02A5, P02A9, P02AD, or P02B1 should not set. If a DTC failed this ignition, test or replace the appropriate Q17 fuel injector.
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.

«Fuel Injector Solenoid Coil Test»(/chevrolet/camaro/v-2009-2013/remont/testing-diagnostics/#engine-controls-and-fuel-36l-troubleshooting-diagnosis)
«Fuel Injector Balance Test»(/chevrolet/camaro/v-2009-2013/remont/testing-diagnostics/#engine-controls-and-fuel-36l-troubleshooting-diagnosis)

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Fuel Injector Replacement

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.
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.
«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) uses information from the crankshaft position (CKP) sensor and the camshaft position (CMP) sensors in order to determine when an engine misfire is occurring. By monitoring variations in the crankshaft rotation speed for each cylinder, the ECM is able to detect individual misfire events. A misfire rate that is high enough can cause 3-way catalytic converter damage. The malfunction indicator lamp (MIL) will flash ON and OFF when the conditions for catalytic converter damage are present. DTCs P0301 through P0306 correspond to cylinders 1 through 6. If the ECM is able to determine that a specific cylinder is misfiring, the DTC for that cylinder will set, and the corresponding fuel injector is disabled. The ECM will re-enable the fuel injector after 4 crankshaft revolutions when the misfire is not current. The ECM will re-enable the fuel injector after 8 crankshaft revolutions when the misfire is not current, if the vehicle is equipped with a manual transmission.

DTC P0121, P0122, P0123, P0221, P0222, P0223, P0335, P0336, or P0338 is not set.
The engine speed is between 420-7,000 RPM.
The evaporative emissions (EVAP) leak detection is not active.
The delivered torque signal is greater than 5 percent at idle.
The delivered torque signal is between 6-29 percent with the transmission in drive.
The intake air temperature (IAT) is warmer than -30°C (-22°F).
The A/C compressor clutch is not changing states.
The ECM is not receiving a rough road signal.
The antilock brake system (ABS) and the traction control system (TCS) are not active or detecting rough road.
The fuel level is greater than 11 percent.
Torque Converter Clutch (TCC) is not applied/active.
The ECM is not in fuel cut-off or decel fuel cut-off mode.
DTCs P0300 through P0306 run continuously when the above conditions exist for greater than 1,000 engine revolutions. 200 revolutions after the first failure.

P0300

The ECM detects a crankshaft rotation speed variation indicating a misfire rate sufficient to cause emissions levels to exceed a predetermined value.

P0301, P0302, P0303, P0304, P0305, P0306

The ECM detects a crankshaft rotation speed variation indicating a single cylinder misfire rate sufficient to cause emissions levels to exceed mandated standards.

DTCs P0300, P0301, P0302, P0303, P0304, P0305, and P0306 are Type A (MIL flashing) or Type B1 DTCs.
The ECM disables the fuel injector of the misfiring cylinder when a misfire is present.

DTCs P0300, P0301, P0302, P0303, P0304, P0305, and P0306 are Type A (MIL flashing) or Type B1 DTCs.

The Crankshaft Position System Variation Learn procedure may need to be performed.
High resistance in the circuits of the injectors may set a misfire DTC without setting an injector DTC. Test the injector circuits of the affected cylinder(s) for a high resistance if you suspect a condition.
If the condition is intermittent, observing the scan tool IC Circuit Test and Fuel Injector Circuit Test Status parameters may help isolate the condition. The circuit test status parameters will change from OK or Not Run to Fault if a condition exists.
A misfire DTC could be caused by an excessive vibration from sources other than the engine. Inspect for the following possible sources: A tire or wheel that is out of round or out of balance Variable thickness brake rotors An unbalanced drive shaft Certain rough road conditions Transmission operation A damaged accessory drive component or belt; remove the belt and safely operate the engine to evaluate

Schematic Reference

Connector End View Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Electrical Information Reference

«Circuit Testing»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
«Connector Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
«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)
«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

J 26792: Spark Tester
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) .

Engine idling at the normal operating temperature. If there is an abnormal engine noise, refer to «Symptoms - Engine Mechanical»(/chevrolet/camaro/v-2009-2013/remont/mechanical/#engine-mechanical-36l-diagnostic-information-and-procedures) .
Verify that DTC P0011, P0014, P0021, P0024, P0087, P0088, P0089, P0201-P0206, P0261, P0262, P0264, P0265, P0267, P0268, P0270, P0271, P0273, P0274, P0276, P0277, P029D, P02A1, P02A5, P02A9, P02AD, P02B1, P0335, P0336, P0338, P0351-P0356, P069E, P2088, P2090, P2092, P2094, P2146, P2149, P2152, P2155, P216A, P216D, P2300, P2301, P2303, P2304, P2306, P2307, P2309, P2310, P2312, P2313, P2315, or P2316 is 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) .
Observe the scan tool Misfire Current Cyl. 1-6 parameters. The Misfire Current Counters should not be incrementing.
Engine idling, perform the cylinder power balance test with a scan tool to isolate the misfiring cylinder. The engine speed should change when each injector is disabled.
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.

Verify that the following conditions do not exist: Vacuum hose splits, kinks, and incorrect connections Engine vacuum leaks Crankcase ventilation system for vacuum leaks 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) . Contaminated Fuel-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 system restrictions If you find any of the above conditions, repair as necessary.
Ignition OFF, remove the T8 ignition coil of the misfiring cylinder, but leave the electrical connector connected.
Inspect the ignition coil boot for the following conditions: Holes Tears Carbon tracking Oil contamination water intrusion If you find any of the above conditions, repair as necessary.
Install the J 26792: Spark Tester to the boot of the appropriate T8 ignition coil and ground.
Attempt to start the engine and observe the J 26792: Spark Tester. The spark tester should spark. If there is no spark, refer to «Electronic Ignition System Diagnosis»(/chevrolet/camaro/v-2009-2013/remont/testing-diagnostics/#engine-controls-and-fuel-36l-troubleshooting-diagnosis) for diagnosis of the ignition coil.
Ignition OFF, remove the spark plug from the misfiring cylinder. Verify that the spark plug does not exhibit the following conditions: Gas, coolant, or oil fouled-Refer to «Spark Plug Inspection»(/chevrolet/camaro/v-2009-2013/remont/testing-diagnostics/#engine-controls-and-fuel-36l-repair-instructions) . Cracked, worn, incorrectly gapped-Refer to «Ignition System Specifications»(/chevrolet/camaro/v-2009-2013/remont/testing-diagnostics/#engine-controls-and-fuel-36l-specifications__ignition-system-specifications) . If there is a condition with the spark plug, replace the spark plug.
Exchange the suspected spark plug with another cylinder that is operating correctly.
Engine idling, observe the scan tool Misfire Current Counter parameters. The misfire should not follow the spark plug exchange. If the misfire follows the spark plug, replace the spark plug.
If all conditions test normal, test or inspect for the following: A lean or rich Q17 fuel injector. An engine mechanical condition-Refer to «Symptoms - Engine Mechanical»(/chevrolet/camaro/v-2009-2013/remont/mechanical/#engine-mechanical-36l-diagnostic-information-and-procedures) .

«Spark Plug Replacement»(/chevrolet/camaro/v-2009-2013/remont/testing-diagnostics/#engine-controls-and-fuel-36l-repair-instructions)
«Ignition Coil Replacement - Bank 1»(/chevrolet/camaro/v-2009-2013/remont/testing-diagnostics/#engine-controls-and-fuel-36l-repair-instructions)
«Ignition Coil Replacement - Bank 2»(/chevrolet/camaro/v-2009-2013/remont/testing-diagnostics/#engine-controls-and-fuel-36l-repair-instructions)

Repair Verification

Perform the «Diagnostic Repair Verification»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-repair-verification) after completing the diagnostic procedure.
To verify that the performance of the catalytic converter has not been affected by the condition that set this DTC, perform the Repair Verification for DTC P0420 or P0430. 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 DTC P0420 or P0430.

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.
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.
«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 knock sensor (KS) is a piezoelectric device that produces an AC voltage of different amplitude and frequency depending on the level of engine mechanical vibration. The KS system monitors the knock sensor in order to determine if detonation or spark knock is present. If the KS system determines that excessive knock is present, the engine control module (ECM) retards the spark timing based on the signal from the KS system. The KS produces an AC signal when specific frequencies are detected. The ECM then retards the timing until knock is controlled.

The ECM tests the functionality of the internal knock sensor signal evaluation circuitry. The KS circuitry within the ECM is responsible for receiving, amplifying, filtering, and evaluating the AC voltage and frequency from the knock sensors. The ECM performs three tests that determine if the internal circuitry within the ECM is functioning correctly.

Test One

The ECM internally turns OFF the knock sensor signal circuits. The ECM then applies different test signals to the internal KS circuitry to verify that each test signal output response is within range. If the ECM detects that any of the test signals are not within range, this DTC sets.

Test Two

The ECM internally turns OFF the knock sensor signal circuits. The ECM then tests for any output response when no test signals are applied. If the ECM detects an output response, this DTC sets.

Test Three

The ECM internally turns OFF the knock sensor signal circuits. The ECM generates an internal test pulse and monitors the return signal. If the return test pulse is less than a calibrated threshold, this DTC sets.

The ECM is controlling spark.
The engine coolant temperature is warmer than 60°C (140°F).
DTC P0324 runs continuously once the above conditions are met.

The ECM detects an incorrect response to the self tests performed on the internal KS circuitry.
The condition exists for greater than 1 second or for a cumulative of 10 seconds.

DTCs P0324 is a Type B DTC.

Description and Operation

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

DTC Type Reference

Scan Tool Reference

Control Module References for scan tool information

Note. If you can hear an engine knock, repair the engine mechanical condition before proceeding with this diagnostic. Refer to Symptoms - Engine Mechanical .

Observe and record the Freeze Frame/Failure Records for DTC P0324. If DTC P0335, P0336, or P0338 also set, refer to «DTC P0335, P0336, or P0338»(/chevrolet/camaro/v-2009-2013/remont/testing-diagnostics/#engine-controls-and-fuel-36l-dtc-p0192-through-p0606p062f) .
Clear the DTCs with a scan tool.
Turn OFF the ignition for 30 seconds.
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. If DTC P0324 failed this ignition, replace the K20 ECM.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for ECM replacement, setup, and programming

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.
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.
«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.

In order to differentiate between normal engine noise and spark knock, the ECM samples the KS signal. The ECM samples the KS signal for a certain length of time under different engine speeds and loads during non-cylinder knock events. This sampling is used to determine a range of acceptable normal engine noise.

P0326 and P0331

Before the ECM can report DTC P0326 or P0331 failed, DTCs P0324, P0335, P0336, and P0338 must run and pass.
DTC P0341, P0342, P0343, P0346, P0347, P0348, P0366, P0367, P0368, P0391, P0392, or P0393 is not set.
The engine coolant temperature (ECT) sensor is warmer than 60°C (140°F).
The engine speed is greater than 2,200 RPM.
DTCs P0326 and P0331 run continuously once the above conditions are met for approximately 20 seconds.

P0327, P0328, P0332, and P0333

Before the ECM can report DTC P0327, P0328, P0332, or P0333 failed, DTCs P0324, P0335, P0336, and P0338 must run and pass.
DTC P0341, P0342, P0343, P0346, P0347, P0348, P0366, P0367, P0368, P0391, P0392, or P0393 is not set.
The engine coolant temperature (ECT) sensor is warmer than 60°C (140°F).
The increase in engine speed is less than a range of 500-2300 RPM per second.
The increase in engine load is less than a range of 50-100 kPa per second.
DTCs P0327, P0328, P0332, and P0332 run continuously once the above conditions are met for approximately 20 seconds.

P0326 and P0331

The ECM detects a short to ground or a voltage on the KS signal circuits in 25 of 250 test samples. The condition exists for greater than 1 second or for a cumulative of 10 seconds.

P0327 or P0332

The ECM detects the KS signal voltage is less than the calculated minimum for a predetermined engine noise level. The condition exists during 2 consecutive tests, for greater 1 second or a cumulative of 10 seconds.

P0328 or P0333

The ECM detects the KS signal voltage is greater than the calculated maximum for a predetermined engine noise level. The condition exists during 2 consecutive tests, for greater 1 second or a cumulative of 10 seconds.

DTCs P0326, P0327, P0328, P0331, P0332, and P0333 are Type B DTCs.

Inspect the KS for physical damage. A KS that is dropped or damaged may cause a DTC to set.
Inspect the KS for proper installation. A KS that is loose or over torqued may cause a DTC to set. The KS should be free of thread sealant. The KS mounting surface should be free of burrs, casting flash, and foreign material.
The KS must be clear of hoses, brackets, and engine electrical wiring.
The normal voltage on the KS signal and low reference circuits is 2.43 volts when the KS is disconnected.

Schematic Reference

Connector End View Reference

Description and Operation

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Electrical Information Reference

«Circuit Testing»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
«Connector Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
«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)
«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

Engine at operating temperature, all accessories OFF. Engine speed greater than 2,000 RPM, observe the appropriate scan tool KS signal voltage parameter. The voltage should be greater than 4 V.
Engine idling, move the related harnesses and connectors for the KS circuits while observing the scan tool KS signal voltage parameters. The voltage should remain steady with no abrupt changes.
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.

Ignition OFF, disconnect the harness connector at the appropriate B68 KS.
Ignition ON, test for 2-3 V between the signal circuit terminal 1 and ground. If less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuits/connections test normal, replace the K20 ECM. If greater than the specified range, test the signal circuit for a short to voltage. If the circuits/connections test normal, replace the K20 ECM.
Test for 2-3 V between the low reference circuit terminal 2 and ground. If less than the specified range, test the low reference circuit for a short to ground or an open/high resistance. If the circuits/connections test normal, replace the K20 ECM. If greater than the specified range, test the low reference circuit for a short to voltage. If the circuits/connections test normal, replace the K20 ECM.
If all circuits/connections test normal, replace the B68 KS sensor.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

«Knock Sensor Replacement - Bank 1»(/chevrolet/camaro/v-2009-2013/remont/testing-diagnostics/#engine-controls-and-fuel-36l-repair-instructions)
«Knock Sensor Replacement - Bank 2»(/chevrolet/camaro/v-2009-2013/remont/testing-diagnostics/#engine-controls-and-fuel-36l-repair-instructions)
«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

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.
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.
«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	Short to Ground	Open/High Resistance	Short to Voltage	Signal Performance
5 V Reference	P0122, P0222, P0335, P0698, P2127	P0335, P0697	P0335, P0338, P0699	P0336, P0697, P0698, P0699
Crankshaft Position Sensor Signal	P0122, P0222, P0335, P0698, P2127	P0335	P0335, P0338, P0699	P0336, P0698, P0699
Low Reference	P0335	P0335		P0336

The crankshaft position sensor is located on the rear of bank 1 of the engine block. The crankshaft position sensor is a hall effect switch that works in conjunction with a 58X reluctor wheel that is attached to the crankshaft. Each tooth on the reluctor wheel is spaced 6 degrees apart with one span having a 12 degree space. The engine control module (ECM) uses the 12 degree space to determine top dead center (TDC) for cylinders 1 and 4. The ECM determines when cylinder 1 is on the compression stroke by monitoring the crankshaft position sensor and the camshaft position sensors. The ECM can synchronize the ignition timing, fuel injector timing, and spark knock control based on the crankshaft position sensor and the camshaft position sensor inputs.

The engine is cranking or operating.
The ECM has detected greater than 12 camshaft revolutions.
The DTC P0335 and P0336 run continuously once the above conditions are met for greater than 5 s.
The DTC P0338 runs once each engine revolution once the above conditions are met for greater than 2 s.

P0335

The ECM does not detect a signal from the crankshaft position sensor. OR
The ECM detects a crankshaft position signal without a reference pulse for greater than 6 revolutions.

P0336

The ECM re-syncs the engine position greater than 2,600 times during an ignition cycle. OR
The ECM detects 28 or more interruptions in the engine speed signal during an ignition cycle.

P0338

The ECM detects a difference of greater than 250 teeth between reference gap position pulses.

DTCs P0335, P0336, and P0338 are Type A DTCs.

The following conditions could also set the DTCs

Physical damage to the crankshaft position sensor or the reluctor wheel
Excessive play or looseness of the crankshaft position sensor or the reluctor wheel
Improper installation of the crankshaft position sensor or the reluctor wheel
Foreign material passing between the crankshaft position sensor and the reluctor wheel
Excessive air gap between the crankshaft position sensor and the reluctor wheel
The ECM uses the camshaft position sensors to determine engine speed and position when there is a crankshaft position sensor condition.
The engine will operate with a crankshaft position sensor condition only if the ECM has stored the learned reference position of the camshafts in memory. With a crankshaft position sensor condition the engine will go into a limp home mode after a restart. The ECM then calculates engine speed from one of the camshaft position sensors.
An intermittent condition in the camshaft position sensor circuits may cause a crankshaft position DTC to set. Inspect the camshaft position sensor, harness connections, and related wiring, if you suspect this condition.

Schematic Reference

Connector End View Reference

Description and Operation

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Electrical Information Reference

«Circuit Testing»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
«Connector Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
«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)
«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

Ignition ON, observe the DTC information with a scan tool. DTC P0697, P0698, or P0699 should not be 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) .
Clear the DTC Info with a scan tool. Attempt to start the engine, observe the DTC information with a scan tool. DTC P0335, P0336, or P0338 should not set.
Observe the scan tool Crankshaft Position Resync parameter, the parameter should always display zero. Move the related harnesses/connectors of the crankshaft position sensor while observing the parameter, verify the engine does not stumble, or stall, and the parameter does not increment.
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.

Ignition OFF, remove the fuse that supplies B+ to terminal 56-X2 of the K20 ECM.
Disconnect the harness connector at the B26 crankshaft position sensor.
Test for 5 ohms or less between the low reference circuit terminal 1 and ground. If greater than the specified range, test for an open/high resistance in the low reference circuit. If the circuits/connections test normal, replace the K20 ECM.
Install the fuse that supplies B+ to terminal 56-X2 of the K20 ECM.
Ignition ON, test for greater than 4.8 V between the 5 V reference circuit terminal 3 and the low reference circuit terminal 1. If less than the specified value, test the 5 V reference circuit for a short to ground or for an open/high resistance. If the circuits/connections test normal, replace the K20 ECM. If greater than the specified value, test the 5 V reference circuit for a short to voltage. If the circuits/connections test normal, replace the K20 ECM.
Test for 4.8-5.2 V between the signal circuit terminal 2 and ground. If the voltage is greater than specified range, test for a short to voltage in the signal circuit. If circuit/connections test normal, replace the K20 ECM. If the voltage is less than the specified range, test for a short to ground or an open/high resistance in the signal circuit. If circuit/connections test normal, replace the K20 ECM.
If all circuits/connections test normal, test or replace the B26 crankshaft position sensor.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

«Crankshaft Position Sensor Replacement»(/chevrolet/camaro/v-2009-2013/remont/testing-diagnostics/#engine-controls-and-fuel-36l-repair-instructions)
«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

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.
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.
«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	Short to Ground	Open/High Resistance	Short to Voltage	Signal Performance
Camshaft Position Sensor 5 V Reference	P0343, P0348, P0368, P0393, P0652, P2122, P2138	P0343, P0348, P0368, P0393, P0651	P0653, P2123, P2138	P0341, P0346, P0366, P0391, P0651, P0652, P0653, P2138
Camshaft Position Sensor Signal Intake Bank 1	P0342	P0343	P0343	P0341
Camshaft Position Sensor Signal Intake Bank 2	P0347	P0348	P0348	P0346
Camshaft Position Sensor Signal Exhaust Bank 1	P0367	P0368	P0368	P0366
Camshaft Position Sensor Signal Exhaust Bank 2	P0392	P0393	P0393	P0391
Low Reference		P0343, P0348, P0368, P0393		P0341, P0346, P0366, P0391

Each camshaft is equipped with a camshaft position sensor that the engine control module (ECM) monitors. The camshaft position sensor is a hall effect switch that works in conjunction with a 4X reluctor wheel. The reluctor wheels are mounted to the camshaft position actuators that are mounted to the end of the camshafts. The ECM uses the camshaft position sensor signals in order to determine the position of the camshafts. The ECM uses the cylinder 1 intake camshaft position sensor to determine injector and ignition system synchronization. Also, the cylinder 1 intake camshaft position sensor is used to determine camshaft to crankshaft relationship. The ECM supplies 5 V to the camshaft position sensors on the 5 V reference circuits, and supplies a ground on the low reference circuits. The camshaft position sensors provide a signal to the ECM on the signal circuits. If the ECM detects extra or missing camshaft position sensor signal transitions, or a signal voltage that is more or less than the predetermined range, within a certain number of crankshaft revolutions, one of these DTCs sets.

The ECM detects greater than 10 crankshaft revolutions.
The engine speed is less than 2,520 RPM.
The DTCs run continuously once the above condition is met.

P0341, P0346, P0366, P0391

The ECM detects a signal from the camshaft position sensor, but the number of pulses are less than or greater than what is expected for one crankshaft revolution. OR
The camshaft position sensor does NOT correlate to the crankshaft position.
Either condition must exist for greater than 1 s, or cumulative of 10 s.

P0342, P0347, P0367, P0392

The camshaft position sensor signal voltage is always low and the ECM detects no pulses from the camshaft position sensor for greater than 1 s, or cumulative of 10 s.

P0343, P0348, P0368, P0393

The camshaft position sensor signal voltage is always high and the ECM detects no pulses from the camshaft position sensor for greater than 1 s or cumulative of 10 s.

DTCs P0341, P0342, P0343, P0346, P0347, P0348, P0366, P0367, P0368, P0391, P0392, and P0393 are Type B DTCs.

The following conditions can also set the DTC

Physical damage to the camshaft position sensor or the reluctor wheel
Excessive play or looseness of the camshaft position sensor or the reluctor wheel
Improper installation of the camshaft position sensor or the reluctor wheel
Foreign material passing between the camshaft position sensor and the reluctor wheel
Excessive air gap between the camshaft position sensor and the reluctor wheel
The cylinder 1 intake camshaft position sensor is used for injector and ignition system synchronization. A stalling condition will occur if the CMP sensor signal is intermittent and a DTC will not set. Inspect all cylinder 1 intake camshaft position sensor circuits for poor connections.

Schematic Reference

Connector End View Reference

Camshaft Actuator System Description

Description and Operation

Electrical Information Reference

«Circuit Testing»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
«Connector Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
«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)
«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

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Scan Tool Reference

Control Module References for scan tool information

Ignition ON, observe the DTC information with a scan tool. DTC P0651, P0652 or P0653 should not be 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) .
Engine idling, observe the DTC information with a scan tool. DTC P0341, P0342, P0343, P0346, P0347, P0348, P0366, P0367, P0368, P0391, P0392, or P0393 should not set.
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.

Ignition OFF, remove the fuse that supplies B+ to terminal 56-X2 of the K20 ECM.
Disconnect the harness connector at the appropriate B23 camshaft position sensor.
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.
Install the fuse that supplies B+ to terminal 56-X2 of the K20 ECM.
Ignition ON, test for greater than 4.8 V between the 5 V reference circuit terminal 3 and ground. If less than the specified value, test the 5 V reference circuit for an open/high resistance. If the circuits/connections test normal, replace the K20 ECM.
Test for 4.8-5.2 V between the signal circuit terminal 2 and ground. If greater than specified range, test for a short to voltage in the signal circuit. If circuit/connections test normal, replace the K20 ECM. If less than the specified range, test for a short to ground or an open/high resistance in the signal circuit. If circuit/connections test normal, replace the K20 ECM.
If all circuits/connections test normal, replace the B23 camshaft position sensor.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

«Camshaft Position Sensor Replacement - Bank 2 (Left Side) Exhaust»(/chevrolet/camaro/v-2009-2013/remont/testing-diagnostics/#engine-controls-and-fuel-36l-repair-instructions)
«Camshaft Position Sensor Replacement - Bank 2 (Left Side) Intake»(/chevrolet/camaro/v-2009-2013/remont/testing-diagnostics/#engine-controls-and-fuel-36l-repair-instructions)
«Camshaft Position Sensor Replacement - Bank 1 (Right Side) Exhaust»(/chevrolet/camaro/v-2009-2013/remont/testing-diagnostics/#engine-controls-and-fuel-36l-repair-instructions)
«Camshaft Position Sensor Replacement - Bank 1 (Right Side) Intake»(/chevrolet/camaro/v-2009-2013/remont/testing-diagnostics/#engine-controls-and-fuel-36l-repair-instructions)
«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

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.
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.
«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	Short to Ground	Open/High Resistance	Short to Voltage	Signal Performance
Ignition Voltage - Bank 1	P0300-P0306, P2300, P2306, P2312	P0300-P0306, P0351, P0353, P0355		P0300, P0301, P0303, P0305
Ignition Voltage - Bank 2	P0300-P0306, P2303, P2309, P2315	P0300-P0306, P0352, P0354, P0356		P0300, P0302, P0304, P0306
Ignition Coil 1 Control Circuit	P2300	P0301, P0351	P2301	P0300, P0301
Ignition Coil 2 Control Circuit	P2303	P0302, P0352	P2304	P0300, P0302
Ignition Coil 3 Control Circuit	P2306	P0303, P0353	P2307	P0300, P0303
Ignition Coil 4 Control Circuit	P2309	P0304, P0354	P2310	P0300, P0304
Ignition Coil 5 Control Circuit	P2312	P0305, P0355	P2313	P0300, P0305
Ignition Coil 6 Control Circuit	P2315	P0306, P0356	P2316	P0300, P0306

The ignition system on this engine uses individual ignition coils and ignition control (IC) circuits for each cylinder. Ignition voltage is supplied to each bank of ignition coils. The engine control module (ECM) controls the ignition system operation. The ECM controls each coil using the IC circuits. The ECM commands the IC circuit low when a spark event is requested.

The sequencing and timing are ECM controlled.

The engine is operating.
The ignition voltage is between 10-18 volts.
The engine speed is less than 6,000 RPM.
The DTCs run continuously once per crankshaft revolution after the above conditions are met.

P0351-P0356

The ECM detects the ignition control circuit is open for greater than 4 seconds or a cumulative of 30 seconds.

P2300, P2303, P2306, P2309, P2312, or P2315

The ECM detects the ignition control circuit is shorted to ground for greater than 4 seconds or a cumulative of 30 seconds.

P2301, P2304, P2307, P2310, P2313, or P2316

The ECM detects the ignition control circuit is shorted to voltage for greater than 4 seconds or a cumulative of 30 seconds.

DTCs P0351, P0352, P0353, P0354, P0355, P0356, P2300, P2301, P2303, P2304, P2306, P2307, P2309, P2310, P2312, P2313, P2315, and P2316 are Type B DTCs.

Inspect the ignition coils for aftermarket devices. An aftermarket device connected to the ignition coil circuits, may cause this DTC to set.
If the condition is intermittent, moving the related harnesses and connectors, with the engine operating, while monitoring the appropriate scan tool Misfire Current Cylinder, or the IC Circuit Test Status parameter may help to isolate the condition. An IC Circuit Test Status parameter will change from OK or Not Run to Fault if a condition is present.

Schematic Reference

Connector End View Reference

Description and Operation

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Electrical Information Reference

«Circuit Testing»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
«Connector Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
«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)
«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

Operate the engine for 30 seconds. Observe the DTC information with a scan tool. DTC P0351, P0352, P0353, P0354, P0355, P0356, P2300, P2301, P2303, P2304, P2306, P2307, P2309, P2310, P2312, P2313, P2315, or P2316 should not set.
Engine operating, observe the scan tool IC Circuit Test Status parameters, the IC Circuit Test Status parameters should display OK or Not Run.
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.

Ignition OFF, disconnect the harness connector at the appropriate T8 ignition coil.
Ignition ON, verify that a test lamp illuminates between the ignition voltage circuit terminal 2 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 voltage circuit and replace as necessary.
Crank or start the engine. Test for 200-400 mV between the appropriate IC circuit terminal 1 and ground. If less than the specified range, test the circuit for a short to ground or an open/high resistance. If the circuit/connection tests normal, replace the K20 ECM. If greater than the specified range, test the circuit for a short to voltage. If the circuit/connection tests normal, replace the K20 ECM.
Connect a test lamp between the each of the ground circuits terminal 3, and terminal 4, and B+. The test lamp should illuminate on each circuit. If the test lamp does not illuminate, test the suspected circuit for an open/high resistance.
If all circuits/connections test normal, replace the T8 ignition coil.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

«Ignition Coil Replacement - Bank 1»(/chevrolet/camaro/v-2009-2013/remont/testing-diagnostics/#engine-controls-and-fuel-36l-repair-instructions)
«Ignition Coil Replacement - Bank 2»(/chevrolet/camaro/v-2009-2013/remont/testing-diagnostics/#engine-controls-and-fuel-36l-repair-instructions)
«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

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.
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.
«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.

A 3-way catalytic converter controls emissions of hydrocarbons, CO and NOx. The catalyst within the converter promotes a chemical reaction, which oxidizes the hydrocarbons and the CO that are present in the exhaust gas. This process converts the hydrocarbons and the CO into water vapor and CO2, and reduces the NOx, by converting the NOx into nitrogen. The catalytic converter also stores oxygen. The ECM monitors this process by using a heated oxygen sensor (HO2S) that is in the exhaust stream after the 3-way catalytic converter. The HO2S 2 produces an output signal that the ECM uses to calculate the oxygen storage capacity of the catalyst. This indicates the ability of the catalyst to convert the exhaust emissions efficiently. The ECM monitors the efficiency of the catalyst by allowing the catalyst to heat, then wait for a stabilization period while the engine is idling. The ECM then adds and removes fuel while monitoring the HO2S 2. When the catalyst is functioning properly, the HO2S 2 response to the extra fuel is slow compared to the response of the HO2S 1, which is located before the 3-way catalytic converter. When the HO2S 2 response is near that of the HO2S 1, the oxygen storage capability and efficiency of the catalyst may be degraded below an acceptable threshold.

Before the ECM can report DTC P0420 or P0430 failed, DTCs P0030, P0031, P0032, P0036, P0037, P0038, P0050, P0051, P0052, P0056, P0057, P0058, P0100, P0101, P0102, P0103, P0121, P0122, P0123, P0131, P0132, P0133, P0135, P0137, P0138, P0140, P0141, P0151, P0152, P0153, P0155, P0157, P0158, P0160, P0161, P0221, P0222, P0223, P0335, P0336, P0338, P2096, P2097, P2098, P2099, P2195, P2196, P2197, P2198, P2232, P2235, P2237, P2240, P2243, P2247, P2251, P2254, P2270, P2271, P2272, P2273, P2297, P2298, P2626, and P2629 must run and pass.
DTC P0010, P0011, P0013, P0014, P0020, P0021, P0023, P0024, P0030, P0031, P0032, P0050, P0051, P0052, P0100, P0101, P0102, P0103, P0116, P0117, P0118, P0119, P0121, P0122, P0123, P0128, P013A, P013C, P013E, P0130, P0131, P0132, P0133, P0135, P0137, P0138, P014A P0140, P0141, P0150, P0151, P0152, P0153, P0155, P0157, P0158, P0160, P0161, P0221, P0222, P0223, P0300, P0301-P0306, P0443, P0455, P0458, P0459, P0496, P0497, P2088, P2089, P2090, P2091, P2092, P2093, P2094, P2095, P2096, P2097, P2098, P2099, P2100, P2101, P2107, P2119, P2122, P2123, P2127, P2128, P2138, P2176, P2177, P2178, P2179, P2180, P2187, P2188, P2189, P2190, P2232, P2235, P2270, P2271, P2272, or P2273 is not set.
The engine speed is between 1,040-2,360 RPM.
The engine load is between 17-60 %.
The air flow into the engine is between 4-21 g/s and steady.
The ambient air temperature is warmer than -30°C (-22°F).
The HO2S 2 is at operating temperature for greater than a range of 140-210 s.
The engine is operating in Closed Loop.
The calculated 3-way catalytic converter temperature is between 480-760°C (896-1,400°F) and steady for greater than 5 s.
The above conditions exist for approximately 17 minutes.
DTCs P0420 and P0430 run once per drive cycle when the above conditions are met. The ECM will attempt to run this diagnostic up to 3 times per drive cycle.

The ECM determines the oxygen storage capacity of the catalyst has degraded below a calibrated threshold. The DTC sets when the condition exists during the sample period, then a 5 s delay for the MIL.

DTCs P0420 and P0430 are Type A DTCs.

Inspect for the following conditions, which may cause a catalytic converter to degrade

An engine misfire
High engine oil or high coolant consumption
Retarded spark timing
A weak or poor spark
A lean fuel mixture
A rich fuel mixture
A damaged oxygen sensor or wiring harness

Schematic Reference

Connector End View Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Electrical Information Reference

«Circuit Testing»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
«Connector Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
«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)
«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

Observe the DTC information with a scan tool. Verify there are no HO2S, fuel system, or misfire DTCs 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) to diagnosis the applicable DTC, before proceeding with this diagnostic procedure.
Verify the following conditions do not exist with the catalytic converter: Dents A severe discoloration caused by excessive temperatures Road damage An internal rattle caused by damaged catalyst substrate Restrictions If a condition is found, repair as necessary.
Verify the following conditions do not exist with the exhaust system: Leaks Physical damage Loose or missing hardware Improperly torqued HO2S If a condition is found, repair the exhaust system.
Verify the following conditions do not exist with the HO2S 2: A grounded wiring harness Damage If a condition is found, replace the HO2S 2.
If no physical condition is detected and the HO2S 2 is as active as the HO2S 1 after operating the engine at 1,500 RPM for 1 minute and then returning to a stabilized idle, then replace the appropriate catalytic converter.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

«Restricted Exhaust»(/chevrolet/camaro/v-2009-2013/remont/exhaust/#engine-exhaust-system)
«Exhaust Leakage»(/chevrolet/camaro/v-2009-2013/remont/exhaust/#engine-exhaust-system__exhaust-leakage)
«Heated Oxygen Sensor Replacement - Bank 1 Sensor 2»(/chevrolet/camaro/v-2009-2013/remont/testing-diagnostics/#engine-controls-and-fuel-36l-repair-instructions)
«Heated Oxygen Sensor Replacement - Bank 2 Sensor 2»(/chevrolet/camaro/v-2009-2013/remont/testing-diagnostics/#engine-controls-and-fuel-36l-repair-instructions)
«Catalytic Converter Replacement - Left Side (LLT)»(/chevrolet/camaro/v-2009-2013/remont/exhaust/#engine-exhaust-system) or «Catalytic Converter Replacement - Left Side (L99/LS3)»(/chevrolet/camaro/v-2009-2013/remont/exhaust/#engine-exhaust-system)
«Catalytic Converter Replacement - Right Side (LLT)»(/chevrolet/camaro/v-2009-2013/remont/exhaust/#engine-exhaust-system) or «Catalytic Converter Replacement - Right Side (L99/LS3)»(/chevrolet/camaro/v-2009-2013/remont/exhaust/#engine-exhaust-system)

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.
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.
«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 off natural vacuum (EONV) test is the small leak detection diagnostic for the evaporative emission system. This diagnostic tests the Evaporative Emission (EVAP) system for a small leak when the key is turned OFF and the correct conditions are met. Heat from the exhaust system is transferred into the fuel tank while the vehicle is operating. When the vehicle is turned OFF and the EVAP system is sealed a change in the fuel tank vapor temperature occurs which results in a corresponding pressure change in the fuel tank vapor space. This change is monitored by the engine control module (ECM) using the fuel tank pressure sensor input. With a leak in the system, the amount of pressure change will be less than that of a sealed system.

Note. The following conditions must be met prior to ignition OFF.

DTC P0100, P0101, P0102, P0103, P0111, P0112, P0113, P0116, P0117, P0118, P0119, P0128, P0443, P0446, P0449, P0450, P0451, P0452, P0453, P0455, P0458, P0459, P0496, P0497, P0498, P0499, P0560, P0562, P0563, P0700, P2227, P2228, or P2229 is not set.
The ignition voltage is greater than 11 V.
A refueling event is not detected.
The EVAP purge solenoid valve command is less than 26 %.
The engine coolant temperature (ECT) during the previous ignition was greater than 74°C (165°F).
The ambient air temperature (AAT) is between 2-32°C (35-90°F).
The engine coolant temperature (ECT) is less than 42°C (108°F) at start-up.
The ECT and the IAT are within 10°C (18°F) of each other at engine start-up.
The barometric pressure (BARO) is greater than 68 kPa.
The vehicle has traveled greater than 5 km (3 mi) this trip.
The fuel level is between 11-88 %.
The vehicle traveled greater than 8 km (5 mi).
The engine run time is greater than 10 min.
DTC P0442 runs once per engine off cycle when the above conditions have been met prior to engine shut down.

The control module detects approximately 6 vacuum/pressure changes significantly less than a calibrated amount. The condition exists during the engine OFF test, then a 5 s delay for the MIL after engine start up.

DTC P0442 is a Type A DTC.

The evaporative emission system can be filled with smoke more quickly and completely by opening the system opposite the end where the smoke is injected. When injecting smoke at the service port remove the fuel fill cap, or temporarily leave the vent open, until smoke is observed then close the system and continue testing.
To help locate intermittent leaks using the J 41413-200: EEST, move all evaporative emission components while observing smoke with the J 41413-SPT: White Light.
Individual components can be isolated and tested using adapters in the J 41413-300: Kit.
A condition may exist where a leak in the evaporative emission system only exists under a vacuum condition. This type of leak may be detected by using the scan tool Purge/Seal function to create a vacuum in the evaporative emission system and then observe the fuel tank pressure parameter for vacuum decay.

Connector End View Reference

Description and Operation

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

DTC Type Reference

Scan Tool Reference

Control Module References for scan tool information

Special Tools

CH 48096: EVAP Service Port Access Tool
J 41413-SPT: High Intensity White Light
J 41413-VLV: EVAP Port Vent Fitting Tool
J 41413-200: Evaporative Emissions System Tester (EEST)
J 41413-300: EVAP Cap and Plug Kit
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) .

Note. Refer to the J 41413-200: EEST operation manual for detailed instructions in Evaporative Emission System Diagnosis . Larger volume fuel tanks and/or those with lower fuel levels may require several min for the floating indicator to stabilize. Ensure that the underbody temperature of the vehicle and the tester are similar.

Disconnect the purge tube at the quick connector on the evaporative emission canister side of the Q12 evaporative emission canister purge solenoid valve and install the CH 48096: Port Tool.
Connect the J 41413-200: EEST to the CH 48096: Port Tool.
Using a scan tool close the evaporative emission canister vent solenoid valve to seal the evaporative emission system.
Use the flow meter on the J 41413-200: EEST, calibrated to 0.51 mm (0.020 in) to determine that there is no leak in the evaporative emission system. If a leak is detected, use the J 41413-200: EEST to apply smoke to the evaporative emission system at the purge tube until the leak is located using the J 41413-SPT: White Light.

Seal the EVAP system and use the flow meter on the J 41413-200: EEST, calibrated to 0.51 mm (0.020 in) to verify there is no leak in the EVAP system.
Clear DTCs.

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.
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.
«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	Short to Ground	Open/High Resistance	Short to Voltage	Signal Performance
Ignition Voltage	P0443, P0458	P0443
EVAP Canister Purge Valve Control Circuit	P0458	P0443	P0459

The evaporative emission (EVAP) canister purge valve is used to purge fuel vapor from the EVAP canister to the intake manifold. The EVAP canister purge valve is pulse width modulated (PWM). Ignition voltage is supplied directly to the EVAP canister purge valve. The engine control module (ECM) controls the solenoid 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.

The engine speed is greater than 80 RPM.
The ignition voltage is between 10-18 volts.
The ECM has commanded the EVAP canister purge valve ON and OFF at least once during the ignition cycle.
The DTCs run continuously once the above conditions are met.

P0443

The ECM detects the EVAP canister purge solenoid control circuit is open. The condition exists for 4 seconds or a cumulative of 30 seconds.

P0458

The ECM detects the EVAP canister purge solenoid control circuit is shorted to ground. The condition exists for 4 seconds or a cumulative of 30 seconds.

P0459

The ECM detects the EVAP canister purge solenoid control circuit is shorted to voltage. The condition exists for 4 seconds or a cumulative of 30 seconds.

DTC P0443, P0458 and P0459 are Type B DTCs.

If the condition is intermittent, move the related harnesses and connectors, with the engine operating, while monitoring the scan tool EVAP Purge Solenoid Circuit Test Status parameters for the component. A circuit test status parameter changes 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

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Electrical Information Reference

«Circuit Testing»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
«Connector Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
«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)
«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

Ignition ON, command the EVAP purge solenoid valve to 50 % with a scan tool. You should hear an audible click.
Engine operating, observe the scan tool EVAP Purge Solenoid Circuit Test Status parameters. Verify the parameters display OK or Not Run.
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.

Ignition OFF, disconnect the harness connector at the Q12 EVAP purge solenoid Valve.
Ignition ON, verify that a test lamp illuminates between the ignition voltage circuit terminal 1 and ground. If the test lamp does not illuminate, test the ignition voltage circuit for a short to ground or an open/high resistance. If the circuit tests normal and the ignition voltage circuit fuse is open, test all components connected to the ignition voltage circuit and replace as necessary.
Connect a test lamp between the control circuit terminal 2 and the ignition voltage circuit terminal 1.
Command the EVAP purge solenoid valve to 50 % and then to 0 % with a scan tool. The test lamp should illuminate or flash and then go OFF. If the test lamp is always ON, test the control circuit for a short to ground. If the circuit tests normal, replace the K20 ECM. If the test lamp is always OFF, test the control circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the K20 ECM.
Test for 2.6-4.6 V between the control circuit terminal 2 and the K20 ECM housing. If the voltage is not within the specified range, replace the K20 ECM.
If all circuits test normal, test or replace the Q12 EVAP purge solenoid.

Ignition OFF, disconnect the harness connector at the Q12 EVAP purge solenoid valve. Test for 15-20 ohms between the terminals of the Q12 EVAP purge solenoid valve. If not within the specified range, replace the Q12 EVAP purge solenoid valve.
Measure the resistance between each terminal of the Q12 EVAP purge solenoid valve and the EVAP purge solenoid valve housing. The DMM should display OL. If less than the specified value, replace the Q12 EVAP purge solenoid.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

«Evaporative Emission Canister Purge Solenoid Valve Replacement»(/chevrolet/camaro/v-2009-2013/remont/testing-diagnostics/#engine-controls-and-fuel-36l-repair-instructions)
«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

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.
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.
«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 control module tests the evaporative emission (EVAP) system for a restricted or blocked vent path. The ECM detects a blockage or restriction by commanding the purge valve ON (open) and the vent valve ON (closed) allowing a vacuum to be applied to the EVAP system. Once a calibrated vacuum level has been reached, the control module commands the purge valve OFF (closed) and the vent valve OFF (open) while monitoring the fuel tank pressure (FTP) sensor for a decrease in vacuum.

The following table illustrates the relationship between the ON and OFF states, and the OPEN or CLOSED states of the EVAP canister purge and vent valves.

Control Module Command	EVAP Canister Purge Valve	EVAP Canister Vent Valve
ON	Open	Closed
OFF	Closed	Open

Before the ECM can report DTC P0446 failed, DTCs P0450, P0451, P0452, and P0453 must run and pass.
DTC P0100, P0101, P0102, P0103, P0111, P0112, P0113, P0116, P0117, P0118, P0119, P0121, P0122, P0123, P0128, P0221, P0222, P0223, P0443, P0449, P0451, P0452, P0453, P0458, P0459, P0496, P0497, P0498, P0499, P0560, P0562, P0563, P0700, P2122, P2123, P2127, P2128 or P2138 is not set.
The ignition voltage is 10-18 V.
The Closed Loop fuel control is enabled.
The engine run time is greater than 10 min or the fuel trim is stable.
The engine is idling.
The FTP is between -18.7 and +9.8 mm Hg (-10.0 and +5.2 in. H2O).
The ambient air temperature (AAT) is between 2-32°C (35-90°F).
The ECT and the IAT are within 10°C (18°F) of each other at engine start-up.
The barometric pressure (BARO) is greater than 68 kPa.
The long term fuel trim remains steady, less than 3 % change in 200 ms over a period of 8 s.
The fuel level is between 11-88 %.
The vehicle speed sensor (VSS) is less than 3 km/h (2 mph).
The above conditions exist for greater than 5 s.
DTC P0446 will attempt to run up to 10 times or until the test completes successfully once per ignition cycle.

The FTP is less than -7.5 mm Hg (-4.0 in. H2O).
The condition is exists for greater than 4 s or a cumulative of 30 s.

DTC P0446 is a Type B DTC.

An intermittent condition could be caused by a damaged EVAP vent housing, a temporary blockage at the EVAP vent valve inlet or a pinched vent hose. A blockage in the vent system may also cause a poor fuel fill problem.

Schematic Reference

Connector End View Reference

Description and Operation

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

DTC Type Reference

Scan Tool Reference

Control Module References for scan tool information

Ignition ON and fuel cap removed, verify that the Fuel Tank Pressure Sensor parameter is between 1.3-1.7 volts. If not within the specified range, go to the fuel tank pressure sensor section in Circuit/System Testing.
Install the fuel cap.
With the engine running, the EVAP canister vent solenoid valve open, use a scan tool to command the EVAP canister purge solenoid valve to 100 percent. The fuel tank vacuum should not increase to more than -15 mmHg (-8 inches H2O). If the fuel tank vacuum is greater than the specified range, go to the restriction section in Circuit/System Testing.
Using the scan tool, decrease the canister purge duty cycle from 100 percent to 0 percent. The vacuum should decrease to near zero. If the fuel tank vacuum does not return to zero or appears to decrease too slowly go to the restriction section in Circuit/System Testing.
Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.

Note. Perform the Circuit/System Verification before proceeding with the Circuit/System Testing.

Restriction

With the engine running, the EVAP canister vent solenoid valve open, and the EVAP canister purge solenoid valve commanded to 100 percent, the fuel tank vacuum should not increase to more than -15 mmHg (-8 inches H2O). If the fuel tank vacuum is greater than the specified value, isolate the restriction by disconnecting one component at a time while the EVAP canister purge solenoid valve is commanded to 100 percent and the vent valve is open.
Using the scan tool, decrease the canister purge duty cycle from 100 percent to 0 percent. The vacuum should decrease to near zero. If the fuel tank vacuum does not return to zero, or appears to decrease too slowly, inspect the components in the EVAP vent system for a restriction.

Fuel Tank Pressure Sensor

Ignition OFF, disconnect the harness connector at the fuel tank pressure sensor.
Ignition OFF, test for less than 5 ohms between the low reference circuit terminal 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 fuel tank pressure sensor.

Evaporative Emission Canister Vent Solenoid Valve Replacement

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

With the engine running, the EVAP canister vent solenoid valve open and the EVAP canister purge solenoid valve commanded to 100 percent, the fuel tank vacuum should not increase to more than -15 mmHg (-8 inches H2O).

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.
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.
«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	Short to Ground	Open/High Resistance	Short to Voltage	Signal Performance
Ignition Voltage	P0499	P0498
EVAP Canister Vent Solenoid Valve Control Circuit	P0498	P0449	P0499

The evaporative emission (EVAP) canister vent valve is used for EVAP system diagnostics. The EVAP canister vent valve is a normally open valve. Battery positive voltage is supplied directly to the EVAP canister vent valve. The engine control module (ECM) controls the solenoid 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. If the ECM detects the control circuit voltage is within a predetermined range when the circuit is commanded OFF, this DTC sets.

The engine speed is greater than 80 RPM.
The ignition voltage is between 10-18 volts.
The ECM has commanded the EVAP canister vent valve ON and OFF at least once during the ignition cycle.
The DTCs runs continuously once the above conditions are met.

P0449

The ECM detects the voltage on the EVAP canister vent valve control circuit is between 2.6-4.6 volts when the driver is commanded OFF. The condition exists for less than 4 seconds or for a cumulative of 30 seconds.

P0498

The ECM detects the voltage on the EVAP canister vent valve control circuit is less than 2.6 volts when the driver is commanded OFF. The condition is present for greater than 4 seconds or for a cumulative of 30 seconds.

P0499

The ECM detects the voltage on the EVAP canister vent valve control circuit is greater than 4.6 volts when the driver is commanded ON. The condition is present for greater than 4 seconds or for a cumulative of 30 seconds.

DTC P0449, P0498 and P0499 are Type B DTCs.
The EVAP system will only purge during open loop.

DTC P0449, P0498 and P0499 are Type B DTCs.

Schematic Reference

Connector End View Reference

Description and Operation

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Electrical Information Reference

«Circuit Testing»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
«Connector Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
«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)
«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

Command the EVAP vent solenoid valve ON and OFF with the scan tool. An audible click should be heard when changing between the commanded states.
Start the engine, observe the scan tool EVAP Vent Solenoid Valve Circuit Test Status parameters. The circuit test status parameters should display OK or Not Run.
Engine Idling, observe the DTC information with a scan tool. DTC P0449, P0498, or P0499 should not set.
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.

Ignition OFF, disconnect the Q13 EVAP vent solenoid valve harness connector.
Ignition ON, verify that a test lamp illuminates between the ignition voltage circuit terminal B and ground. If the test lamp does not illuminate, test the ignition voltage circuit for a short to ground or an open/high resistance. If the circuit tests normal and the ignition voltage circuit fuse is open, test all components connected to the ignition voltage circuit and replace as necessary.
Ignition OFF, connect a test lamp between the control circuit terminal A and the ignition voltage circuit terminal B.
Ignition ON, command the scan tool EVAP vent solenoid valve ON and OFF. The test lamp should turn ON and OFF. If the test lamp remains ON all the time, test the control circuit for a short to ground. If circuit/connections test normal, replace the K20 ECM. If the test lamp remains OFF all the time, test the control circuit for a short to voltage or an open/high resistance. If circuit/connections test normal, replace the K20 ECM.
Test for 2.6-4.6 V between the control circuit terminal 2 and ground. If not within the specified range, replace the K20 ECM.
If all circuits/connections test normal, test or replace the Q13 EVAP vent solenoid valve.

Ignition OFF, disconnect the Q13 EVAP vent solenoid valve harness connector.
Test for 20-24 ohms between the terminals of the Q13 EVAP vent solenoid valve. If not within the specified range, replace the Q13 EVAP vent solenoid valve.
Measure the resistance between each terminal of the Q13 EVAP vent solenoid valve and the Q13 EVAP vent solenoid valve housing. The DMM should display O.L. If less than the specified value, replace the Q13 EVAP vent solenoid valve.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

«Evaporative Emission Canister Vent Solenoid Valve Replacement»(/chevrolet/camaro/v-2009-2013/remont/testing-diagnostics/#engine-controls-and-fuel-36l-repair-instructions)
«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

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.
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.
«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	Short to Ground	Open	Short to Voltage
Operating Conditions: Engine operating in Closed Loop at idle Parameter Normal Range: 0.2-4.8 V
5 V Reference Voltage	0 V	0 V	5 V
FTP Sensor Signal	0 V	0 V	5 V
Low Reference		4.2 V

FTP Sensor

The control module monitors the fuel tank pressure (FTP) sensor signal in order to detect vacuum decay and excess vacuum during the evaporative emission (EVAP) diagnostic test. The control module supplies a 5 V reference and a low reference circuit to the FTP sensor. This DTC sets if the engine control module (ECM) detects one of the following conditions

The FTP sensor signal voltage is not within a calibrated range on a cold start-up.
The FTP sensor signal oscillates greater than a calibrated amount when vehicle speed is within a predetermined range.

The following table illustrates the relationship between FTP sensor signal voltage and the EVAP system pressure/vacuum.

FTP Sensor Signal Voltage	Fuel Tank Pressure
High, Approximately 1.5 V or More	Negative Pressure/Vacuum
Low, Approximately 1.5 V or Less	Positive Pressure

P0450

DTC P0100, P0101, P0102, P0103, P0116, P0117, P0118, P0119, P0443, P0449, P0458, P0459, P0498, P0499, P0506, P0507, P050A, P0700, P2227, P2228, or P2229 is not set.
The engine is operating.
The ambient air temperature is greater than -7°C (+19°F).
The vehicle speed is less than 30 km/h (19 mph).
The ECM has commanded the EVAP canister vent valve open for greater than 4 s.
DTC P0450 runs continuously when the above conditions are met for approximately 25 s.

P0451 Condition 1

DTC P0100, P0101, P0102, P0103, P0116, P0117, P0118, P0119, P0443, P0449, P0458, P0459, P0498, P0499, P050A, P0506, P0507, P0700, P2227, P2228, or P2229 is not set.
The engine is operating for greater than 1 s.
The engine is idling.
The ambient air temperature is warmer than -7°C (+19°F).
The vehicle speed is less than 10 km/h (6 mph) for greater than 30 s.
The BARO is greater than 68 kPa.
The fuel level is between 11-88 %.
The ECM has commanded the EVAP canister purge solenoid ON.
The ECM has commanded the EVAP canister vent valve closed for greater than 4 s.
DTC P0451 runs continuously when the above conditions are met for approximately 25 s.

P0451 Condition 2

DTC P0100, P0101, P0102, P0103, P0116, P0117, P0118, P0119, P0443, P0449, P0458, P0459, P0498, P0499, P050A, P0506, P0507, P0700, P2227, P2228, or P2229 is not set.
The engine is operating.
The BARO is greater than 68 kPa.
The ECM has commanded the EVAP canister purge solenoid OFF.
The ECM has commanded the EVAP canister vent valve open. OR
The vehicle speed is between 10-76 km/h (6-47 mph) for greater than 30 s.
The fuel level is between 11-73 %.
The EVAP purge solenoid is commanded ON. OR
The calculated ambient air temperature is 4-35°C (39-95°F) for greater than 3 s.
DTC P0451 runs continuously when the above conditions are met for approximately 7 s.

P0450

The ECM detects that the FTP sensor signal oscillates greater than 6.09 mm/Hg (3.26 in. H2O) for 4 s, or for a cumulative of 30 s.

P0451

The ECM detects that the FTP is less than -26.2 mm/Hg (-14.1 in. H2O) or greater than 11.0 mm/Hg (5.9 in. H2O) for 4 s or for a cumulative of 30 s. OR
The ECM detects a change in the zero point of FTP sensor signal greater than +/-5.16 mm/Hg (2.76 in. H2O) from the zero point at start up for 4 s, or a cumulative of 30 s.

DTCs P0450 and P0451 are Type B DTCs.

A blocked or clogged EVAP canister vent solenoid valve, or inlet may set these DTCs.

Schematic Reference

Connector End View Reference

Description and Operation

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Electrical Information Reference

«Circuit Testing»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
«Connector Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
«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)
«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

J 41413-200: Evaporative Emissions System Tester (EEST)
J 41415-30: Fuel Tank Adapter
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) .

Ignition OFF, remove the fuel fill cap. Connect the J 41415-30: Adapter to the fuel tank filler neck. Connect the J 41413-200: EEST to the J 41415-30: Adapter.
Ignition ON, seal the EVAP system using the scan tool Purge/Seal function.
Pressurize the EVAP system with nitrogen to 9.33 mm/Hg (5 in/H2O). Compare the scan tool Fuel Tank Pressure Sensor parameter to the J 41413-200: EEST pressure/vacuum gage. Verify the scan tool FTP sensor parameter is within +/-0.9 mmHg (+/-0.5 in.H2O) of the pressure/vacuum gauge. If not within the specified range, replace the B150 FTP sensor.
Command the Q13 EVAP vent solenoid valve OPEN with a scan tool. Verify the scan tool FTP sensor parameter is -0.9 to +0.9 mmHg (-0.5 to +0.5 in.H2O). If not within the specified range, replace the B150 FTP sensor.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Fuel Tank Pressure Sensor Replacement

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.
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.
«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	Short to Ground	Open/High Resistance	Short to Voltage	Signal Performance
5 V Reference	P0122, P0452, P0642	P0452, P0641	P0453, P0643	P0641, P0642, P0643
FTP Sensor Signal	P0452	P0452	P0453
Low Reference		P0446

Circuit	Short to Ground	Open	Short to Voltage
Operating Conditions: Engine operating in Closed Loop at idle Parameter Normal Range: 0.2-4.8 V
5 V Reference	0 V	0 V	5 V
FTP Sensor Signal	0 V	0 V	5 V
Low Reference		4.2 V

FTP Sensor

The evaporative emission (EVAP) system is used to store fuel vapors in order to reduce the amount of fuel vapors into the atmosphere. The fuel tank pressure (FTP) sensor is only used for EVAP system diagnostics. The FTP sensor is a transducer that varies resistance according to changes in the fuel tank pressure. The engine control module (ECM) monitors the FTP sensor signal in order to detect vacuum decay and excess vacuum during the EVAP system diagnostic test. The ECM supplies a 5 V reference and a low reference circuit to the FTP sensor.

FTP Sensor Signal Voltage	Fuel Tank Pressure
High, Approximately 1.5 V or More	Negative Pressure/Vacuum
Low, Approximately 1.5 V or Less	Positive Pressure

The engine speed is greater than 240 RPM.
The DTCs run continuously once the above conditions are met for 10 s.

P0452

The ECM detects the FTP sensor signal voltage is less than 0.2 V for 4 s, or a cumulative of 30 s.

P0453

The ECM detects the FTP sensor signal voltage is greater than 4.85 V for 4 s, or a cumulative of 30 s.

DTC P0452 and P0453 are Type B DTCs.

If a shared 5 V reference circuit is shorted to ground or shorted to a voltage, other 5 V reference circuits may be affected.

Schematic Reference

Connector End View Reference

Description and Operation

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Electrical Information Reference

«Circuit Testing»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
«Connector Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
«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)
«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

Ignition ON, observe the DTC information with a scan tool. DTC P0641, P0642 or P0643 should not be 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) .
Observe the FTP Sensor voltage parameter. The FTP sensor voltage should be between 0.2-4.8 V.
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.

Ignition OFF, remove the fuse that supplies B+ to terminal 56-X2 of the K20 ECM.
Disconnect the multi-way harness connector X305, located near the fuel tank.
Test for less than 5 ohms between the low reference circuit terminal P and ground. If greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit/connections test normal, replace the K20 ECM.
Install the fuse that supplies B+ to terminal 56-X2 of the K20 ECM.
Ignition ON, test for 4.8-5.2 V between the 5 V reference circuit terminal B and ground. If less than the specified range, test the 5 V reference circuit for a short to ground or open/high resistance. If the circuit/connections test 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/connections test normal, replace the K20 ECM.
Observe the scan tool B150 FTP sensor parameter. Verify that the FTP Sensor parameter is less than 5 V. If greater than the specified value, test the signal circuit terminal E for a short to voltage. If the circuit/connections test normal, replace the K20 ECM.
Install a 3 A fused jumper wire between the signal circuit terminal C and the 5 V reference circuit terminal B. Verify that the scan tool FTP Sensor parameter is greater than 5 V. If less than the specified value, test the signal circuit for a short to ground or an open/high resistance. If the circuit/connections test normal, replace the K20 ECM.
Remove the fuel tank. Refer to «Fuel Tank Replacement»(/chevrolet/camaro/v-2009-2013/remont/testing-diagnostics/#engine-controls-and-fuel-36l-repair-instructions) .
Disconnect the B150 FTP sensor connector.
Inspect the FTP sensor circuits in the fuel tank harness, between the FTP sensor connector and X305 for the following conditions, and repair as necessary: Damaged wiring or terminals Open circuits Short to ground Wire to wire short
If all circuits/connections test normal, test or replace the B150 FTP sensor.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

«Fuel Tank Pressure Sensor Replacement»(/chevrolet/camaro/v-2009-2013/remont/testing-diagnostics/#engine-controls-and-fuel-36l-repair-instructions)
«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

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.
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.
«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 control module tests the evaporative emission (EVAP) system for a large leak, or a stuck closed EVAP canister purge valve. The control module monitors the fuel tank pressure (FTP) sensor signal to determine the EVAP system vacuum level. When the conditions for running are met, the control module commands the EVAP canister purge valve OPEN and the EVAP vent valve CLOSED. This allows engine vacuum to enter the EVAP system. At a calibrated time, or vacuum level, the control module commands the EVAP canister purge valve closed, sealing the system, and monitors the FTP sensor input in order to determine the EVAP system vacuum level. If the system is unable to achieve the calibrated vacuum level, or the vacuum level increases too slowly, a DTC sets.

FTP Sensor Signal Voltage	Fuel Tank Pressure
High, Approximately 1.5 V or More	Negative Pressure/Vacuum
Low, Approximately 1.5 V or Less	Positive Pressure

The following table illustrates the relationship between the ON and OFF states, and the OPEN or CLOSED states of the EVAP canister purge and vent valves.

Control Module Command	EVAP Canister Purge Valve	EVAP Canister Vent Valve
ON	Open	Closed
OFF	Closed	Open

Before the engine control module (ECM) can report DTC P0455 or DTC P0497 failed, DTCs P0446 and P0496 must run and pass.
DTC P0100, P0101, P0102, P0103, P0111, P0112, P0113, P0116, P0117, P0118, P0119, P0443, P0446, P0449, P0450, P0451, P0452, P0453, P0458, P0459, P0496, P0498, P0499, P0560, P0562, P0563, P0700, P2122, P2123, P2127, P2128, P2138, P2227, P2228, or P2229 is not set.
The ignition voltage is between 10-18 V.
The engine run time is greater than 10 min or the fuel trim is stable.
The FTP is between -18.7 and +9.8 mm Hg (-10.0 and +5.2 in. H2O).
The Closed Loop fuel control is enabled.
The engine is idling.
The barometric pressure (BARO) is greater than 68 kPa.
The fuel level is between 11-88 %.
The ambient air temperature (IAT) is between 2-32°C (36-90°F).
The engine coolant temperature (ECT) is within 10°C (18°F) of the ambient air temperature at engine start.
The vehicle speed sensor (VSS) is less than 3 km/h (2 mph).
The above conditions are met for greater than 30 s.
DTC P0455 or DTC P0497 will attempt to run up to 10 times or until the test completes successfully once per ignition cycle.

The ECM detects the EVAP system is not able to achieve or maintain vacuum during the diagnostic test.
The condition exists for greater than 4 s or for a cumulative of 30 s.

DTC P0455 is a Type B DTC.
DTC P0497 is a Type A DTC.

DTC P0455 is a Type B DTC.
DTC P0497 is a Type A DTC.

A loose, missing, or damaged fuel fill cap can cause this DTC to set.
A stuck closed, blocked, or restricted EVAP canister purge solenoid valve, can cause this DTC to set.
A blockage or restriction in the EVAP canister purge solenoid valve vacuum supply hose, EVAP canister purge solenoid valve purge pipe, EVAP canister, or vapor pipe, can cause this DTC to set.
A temporary blockage in the EVAP canister purge solenoid valve, purge pipe or EVAP canister could cause an intermittent condition. Inspect and repair any restriction in the EVAP system.
To help locate intermittent leaks, use the J 41413-200: EEST to introduce smoke into the EVAP system. Move all EVAP components while observing smoke with the J 41413-SPT: White Light. Introducing smoke in 15 s intervals will allow less pressure into the EVAP system. When the system is less pressurized, the smoke will sometimes escape in a more condensed manner.
To improve the visibility of the smoke exiting the EVAP system, observe the suspected leak area from different angles with the J 41413-SPT: White Light.
Observe the Freeze Frame/Failure Records vehicle mileage since the diagnostic test last failed may help determine how often the condition occurs that caused the DTC to set. This may assist in diagnosing the condition.

Schematic Reference

Connector End View Reference

Description and Operation

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

DTC Type Reference

Scan Tool Reference

Control Module References for scan tool information

Special Tools

CH-48096: EVAP Service Port Access Tool
J 41413-200: Evaporative Emissions System Tester (EEST)
J 41413-300: EVAP Cap and Plug Kit
J 41413-SPT: High Intensity White Light
J 41413-VLV: EVAP Port Vent Fitting Tool
J-41415-30: Fuel Tank Adapter
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) .

Verify the following conditions do not exist in the EVAP system: Loose, incorrect, missing, or damaged fuel fill cap Loose, missing, or damaged service port schrader valve, if equipped A damaged Q12 EVAP canister purge solenoid valve Disconnected, incorrectly routed, kinked, or damaged EVAP pipes and hoses A damaged Q13 EVAP vent solenoid valve or EVAP canister If you find any of the above conditions, repair as necessary.
Remove the fuel fill cap. Connect the J-41415-30: Adapter to the fuel tank filler neck. Connect the J 41413-200: EEST to the J-41415-30: Adapter.
Calibrate the J 41413-200: EEST Flow Meter to 0.51 mm (0.020 in).
Command the EVAP vent solenoid valve closed with a scan tool.
Activate the J 41413-200: EEST and compare the flow meter's stable floating indicator position to the red flag. The floating indicator should be level with the red flag. If the floating indicator is above the red flag, test for a leak in the EVAP system. If the floating indicator is below the red flag, test for a blockage or restriction in the EVAP system.
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.

Leak Testing

Connect the J-41415-30: Adapter to the fuel tank filler neck. Connect the J 41413-200: EEST to the J-41415-30: Adapter.
Connect the CH-48096: Access Tool between the Q12 EVAP purge solenoid valve and the EVAP purge pipe.
Turn the nitrogen/smoke valve on the control panel to SMOKE.
Command the Q13 EVAP vent solenoid valve closed with a scan tool.
Use the remote switch to introduce smoke into the EVAP system.
Use the J 41413-VLV: Fitting Tool to open the EVAP service port. Once smoke is observed, remove the J 41413-VLV: Fitting Tool.
Verify that smoke is not exiting the entire EVAP system with the J 41413-SPT: White Light. NOTE: The fuel tank may need to be lowered to improve visibility of some of the EVAP system components. If smoke is observed, repair the condition as necessary.
Remove the J 41413-200: EEST nitrogen supply hose from the J-41415-30: Adapter, and remove the J-41415-30: Adapter from the filler neck.
Install the fuel fill cap.
Connect the J 41413-200: EEST nitrogen/smoke supply hose to the EVAP service port of the CH-48096: Access Tool.
Command the Q13 EVAP vent solenoid valve closed with a scan tool.
Use the remote switch to introduce smoke into the EVAP system.
Verify that smoke is not exiting the entire EVAP system with the J 41413-SPT: White Light. If smoke is observed, repair the condition as necessary.
Verify individual EVAP system components do not leak using the J 41413-300: Kit. If a condition is found replace the affected component.

Blockage/Restriction Testing

Connect the J-41415-30: Adapter to the fuel tank filler neck. Connect the J 41413-200: EEST to the J-41415-30: Adapter.
Seal the EVAP system using the scan tool EVAP Purge/Seal function.
Pressurize the EVAP system with nitrogen to 9.33 mm/Hg (5 in/H2O). Compare the scan tool Fuel Tank Pressure Sensor parameter to the J 41413-200: EEST pressure/vacuum gauge. Verify the scan tool FTP sensor parameter is within +/-0.9 mmHg (+/-0.5 in. H2O) of the pressure/vacuum gauge. If not within the specified range, replace the B150 FTP sensor.
Command the Q12 EVAP purge solenoid valve to 100 % with a scan tool. Verify the scan tool FTP sensor parameter is -0.9 to +0.9 mmHg (-0.5 to +0.5 in.H2O). If greater than the specified value, disconnect the EVAP pipes listed below one at a time while observing the scan tool FTP sensor parameter. If the FTP sensor parameter drops to within the specified range when a pipe is disconnected, repair the blockage or restriction in one of the following EVAP pipe/hoses: EVAP purge vacuum source from the Q12 EVAP purge solenoid valve EVAP purge pipe from the Q12 EVAP purge solenoid valve EVAP purge pipe at the EVAP canister EVAP vapor pipe at the EVAP canister
If a condition with the EVAP system cannot be located, refer to Diagnostic Aides.

Seal the EVAP system using the scan tool EVAP Purge/Seal function.
Pressurize the EVAP system to 9.33 mm/Hg (5 in/H2O).
Compare the scan tool Fuel Tank Pressure sensor parameter to the J 41413-200: EEST pressure/vacuum gauge. Verify the scan tool FTP sensor parameter is within +/-0.9 mmHg (+/-0.5 in. H2O) of the pressure/vacuum gauge. If not within the specified range, replace the B150 FTP sensor.
Command the Q13 EVAP vent solenoid valve open with a scan tool. Verify the scan tool FTP sensor parameter is -0.9 to +0.9 mmHg (-0.5 to +0.5 in.H2O). If not within the specified range, replace the B150 FTP sensor.

«Fuel Tank Pressure Sensor Replacement»(/chevrolet/camaro/v-2009-2013/remont/testing-diagnostics/#engine-controls-and-fuel-36l-repair-instructions)
«Evaporative Emission Canister Purge Solenoid Valve Replacement»(/chevrolet/camaro/v-2009-2013/remont/testing-diagnostics/#engine-controls-and-fuel-36l-repair-instructions)
«Evaporative Emission Canister Vent Solenoid Valve Replacement»(/chevrolet/camaro/v-2009-2013/remont/testing-diagnostics/#engine-controls-and-fuel-36l-repair-instructions)
«Evaporative Emission Canister Replacement»(/chevrolet/camaro/v-2009-2013/remont/testing-diagnostics/#engine-controls-and-fuel-36l-repair-instructions)

Turn the nitrogen/smoke valve to nitrogen.
Command the Q13 EVAP vent solenoid valve closed with a scan tool.
Use the remote switch to activate the J 41413-200: EEST.
Use the remote switch to introduce nitrogen and fill the EVAP system until the floating indicator stabilizes.
Verify the flow meter's stable floating indicator position is at or below the red flag.
Remove the CH-48096: Access Tool, and connect the purge hose/pipe to the EVAP purge solenoid valve.
Clear the DTCs with a scan tool.

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.
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.
«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 Description

This DTC tests for continuous intake manifold vacuum flow to the Evaporative Emission (EVAP) System. The control module seals the EVAP system by commanding the EVAP canister purge solenoid valve Closed and the EVAP canister vent solenoid valve Closed. The control module monitors the fuel tank pressure (FTP) sensor to determine if a vacuum is being drawn on the EVAP system. If vacuum in the EVAP system is greater than a predetermined value within a predetermined time, this DTC sets.

FTP Sensor Signal Voltage	Fuel Tank Pressure
High, Approximately 1.5 V or More	Negative Pressure/Vacuum
Low, Approximately 1.5 V or Less	Positive Pressure

Before the engine control module (ECM) can report DTC P0496 failed, DTCs P0450, P0451, P0452, and P0453 must run and pass.
DTC P0100, P0101, P0102, P0103, P0111, P0112, P0113, P0116, P0117, P0118, P0119, P0443, P0446, P0449, P0450, P0451, P0452, P0453, P0458, P0459, P0498, P0499, P0560, P0562, P0563, P0700, P2122, P2123, P2127, P2128, P2138, P2227, P2228, or P2229 is not set.
The fuel system is in closed loop.
The engine run time is greater than 10 min, or the long term fuel trim is stable.
The vehicle speed sensor (VSS) is less than 3 km/h (2 mph).
The engine is idling.
The ignition voltage is between 10-18 V.
The Closed Loop fuel control is enabled.
The fuel tank pressure (FTP) is between -10.0 and +5.0 in. H2O (-18.7 and +9.8 mm Hg).
The ambient air temperature is between 2-32°C (36-90°F).
The start-up engine coolant temperature (ECT) is within 10°C (18°F) of ambient air temperature
The fuel tank level is between 11-88 %.
The barometric pressure (BARO) is greater than 68 kPa.
The above conditions are met for greater than 30 s.
DTC P0496 will attempt to run up to 10 times or the test completes successfully once per ignition cycle.

The control module detects vacuum during a non-purge condition.
The condition exists for greater than 4 s or for a cumulative of 30 s.

DTC P0496 is a Type B DTC.

Observe the Freeze Frame/Failure Records vehicle mileage since the diagnostic test last failed may help determine how often the condition occurs that caused the DTC to set. This may assist in diagnosing the condition.
The EVAP system tests run when engine is first started and meets The Conditions for Running the DTC. An intermittent condition could be caused by an improperly installed or damaged EVAP canister purge solenoid valve, or by a temporary blockage or restriction in the EVAP canister purge solenoid valve.

Schematic Reference

Connector End View Reference

Description and Operation

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

DTC Type Reference

Scan Tool Reference

Control Module References for scan tool information

Disconnect the Q12 EVAP purge solenoid valve electrical harness connector.
Start the engine.
Command the Q13 EVAP vent solenoid valve Closed with a scan tool.
Increase the engine speed to 1,200-1,500 RPM.
Observe the scan tool fuel tank pressure (FTP) sensor parameter. Verify the scan tool FTP sensor parameter is -0.9 to +0.9 mm Hg (-0.5 to +0.5 in. H2O). If not within the specified range, replace the Q12 EVAP purge solenoid valve.
Ignition ON, engine OFF, disconnect the EVAP purge hose/pipe at the Q12 EVAP purge solenoid valve.
Observe the scan tool FTP sensor parameter. Verify the FTP sensor parameter is -0.9 to +0.9 mm Hg (-0.5 to +0.5 in. H2O). If not within the specified range, replace the B150 FTP sensor.

«Evaporative Emission Canister Purge Solenoid Valve Replacement»(/chevrolet/camaro/v-2009-2013/remont/testing-diagnostics/#engine-controls-and-fuel-36l-repair-instructions)
«Fuel Tank Pressure Sensor Replacement»(/chevrolet/camaro/v-2009-2013/remont/testing-diagnostics/#engine-controls-and-fuel-36l-repair-instructions)
«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

Start the engine.
Command the Q13 EVAP vent solenoid valve Closed with a scan tool.
Increase the engine idle to 1,200-1,500 RPM.
Observe the scan tool FTP sensor parameter. Verify the FTP sensor parameter is -0.9 to +0.9 mm Hg (-0.5 to +0.5 in. H2O).
Clear the DTCs with a scan tool.

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.
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.
«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 throttle actuator control (TAC) motor is a DC motor that is part of the throttle body assembly. The TAC motor drives the throttle valve. The engine control module (ECM) controls the TAC motor based on throttle position sensor input. The idle speed is controlled by the ECM based on various inputs. The ECM commands the TAC motor to open or close the throttle valve in order to maintain the desired idle speed. If the ECM detects the actual idle speed is not within a predetermined range of the desired idle speed, this DTC sets.

P0506 and P0507

DTC P0111, P0112, P0113, P0116, P0117, P0118, P0119, P0121, P0122, P0123, P0221, P0222, P0223, P0442, P0443, P0446, P0455, P0458, P0459, P0496, or P0700 is not set.
The engine is operating for greater than 4 seconds.
The engine load is between 32-75 percent, for P0506 or manual transmission only.
The engine coolant temperature (ECT) is warmer than -11°C (+13°F).
The intake air temperature (IAT) is warmer than -11°C (+13°F).
The vehicle speed is 0 km/h (0 mph) and accelerator pedal position (APP) input is at 0 percent.
The EVAP intrusive leak test is not enabled.
The cold start idle speed control is not active.
The evaporative emission (EVAP) canister purge valve command less than 40 percent.
A vehicle speed was detected prior to the diagnostic running.
DTC P0506 and P0507 run continuously once the above conditions are met for greater than 10 seconds.

P050A

DTC P0111, P0112, P0113, P0116, P0117, P0118, P0119, P0121, P0122, P0123, P0221, P0222, P0223, P0442, P0443, P0446, P0455, P0458, P0459, P0496, or P0700 is not set.
The engine load is between 70-90 percent, for under speed or manual transmission only.
The vehicle speed is 0 km/h (0 mph) and accelerator pedal position (APP) input is at 0 percent.
The engine coolant temperature (ECT) is colder than 65°C (149°F).
The catalyst cold start heating strategy is active.
DTC P050A runs once an ignition cycle when the conditions above have been met for 7 seconds.

P0506

The actual engine speed is less than the desired idle speed by at least 100 RPM for greater than 4 seconds.

P0507

The actual engine speed is greater than the desired idle speed by at least 200 RPM for greater than 4 seconds. OR
The ECM detects 3 fuel cut-offs due to an engine over speed condition while the vehicle speed is zero.

P050A

The actual engine speed is 100 RPM less or 200 RPM greater than the desired idle speed during a cold start, for greater than 4 seconds.

DTCs P0506, P0507, and P050A are Type B DTCs.

Inspect for a condition in which the throttle valve may have been held open. For example, ice may have formed in the throttle bore.

Schematic Reference

Connector End View Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Electrical Information Reference

«Circuit Testing»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
«Connector Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
«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)
«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

Observe the DTC information with a scan tool. If there are any throttle actuator control (TAC), throttle position (TP) sensor, accelerator pedal position (APP) sensor, or fuel rail pressure (FRP) regulator DTCs 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) .
Operate the engine within the conditions for running the DTCs for 1 minute. DTC P0506, P0507, or P050A should not set.
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.

Engine operating, command the engine speed up to 1,400 RPM, down to 600 RPM, up to 1,400 RPM, and then exit using the scan tool. The engine speed should steadily increase and decrease as commanded.

If the idle does not increase or decrease steadily, verify that none of the following conditions is present

Vacuum leaks
The throttle valve for the correct operation-A throttle valve that does not close correctly sets this DTC.
Restricted air intake system
The throttle body for damage and/or tampering
Incorrect or malfunctioning PCV system
Excess deposits in the throttle body
A parasitic load on the engine-For example, a transmission condition, a belt driven accessory condition Repair the condition as necessary.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

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.
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.
«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 applies to internal microprocessor integrity conditions within the engine control module (ECM). This diagnostic also addresses if the ECM is not programmed.

P0601 and P0604

These DTCs run once an ignition cycle.

P0602, P0603, P0606

These DTCs run continuously when the ignition is ON.

P167D

The engine is operating.
The ignition voltage is between 10-25.5 V.
The engine speed is less than 5,000 RPM.
DTC P167D runs continuously when the above conditions are met.

P2610

The engine speed is greater than 240 RPM.
DTC P2610 runs continuously when the engine is operating and the real time clock is active.

The ECM detects an internal failure or incomplete programming for more than 10 s.

DTCs P0601, P0602, P0603, P0604, and P0606 are Type A DTCs.
DTCs P167D and P2610 are Type B DTCs.

DTCs P0601, P0602, P0603, P0604, and P0606 are Type A DTCs.
DTCs P167D and P2610 are Type B DTCs.

Low voltage or a momentary loss of power or ground to the ECM may cause a DTC to set. Verify the following

The battery cables are clean and tight, and the battery is fully charged. Refer to «Battery Inspection/Test»(/chevrolet/camaro/v-2009-2013/remont/charging-system/#battery-charging-system-and-starting-system) .
The ECM ground circuits do not have an open or high resistance.
The ECM power circuits do not have an open, short to ground, or high resistance.

Schematic Reference

Connector End View Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Electrical Information Reference

«Circuit Testing»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
«Connector Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
«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)
«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

Observe the DTC information with a scan tool. DTC P0601, P0602, P0603, P0604, P0606, P167D, or P2610 should not set.
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.

Observe the DTC information with the scan tool. If DTC P0602 is set, attempt to program the K20 ECM before replacing the K20 ECM. Refer to «Control Module References»(/chevrolet/camaro/v-2009-2013/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) . If DTC P0602 resets, replace the K20 ECM.
Observe the DTC information with a scan tool. DTC P0601, P0603, P0604, P0606, P167D, or P2610 should not set. If a DTC failed this ignition, replace the K20 ECM.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for engine control module replacement, setup, and programming

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.
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.
«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 internal fault detection is handled inside the fuel pump control module. No external circuits are involved.

The fuel pump control module runs the program to detect an internal fault when power up is commanded. The only requirements are voltage and ground. This program runs even if the voltage is out of the valid operating range.

The fuel pump control module has detected an internal malfunction.

DTC P0601, P0602, P0603, P0604, P0606 and P062F are type A DTCs.

Description and Operation