Test Description
The number below refers to the step number on the diagnostic table.
- 2: If this DTC sets, there is a problem with the CMP actuator solenoid high control circuit shorted to voltage or the solenoid stuck open.
| Step | Action | Yes | No |
|---|---|---|---|
| 1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle |
| 2 | Start the engine. Clear the DTCs with a scan tool. Does the scan tool indicate that DTC P0013 failed this ignition? | Go to DTC P0013 | Go to Step 3 |
| 3 | Observe the Freeze Frame/Failure Records for this DTC. Turn OFF the ignition for 30 seconds. Start the engine. 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. Did the DTC fail this ignition? | Go to Step 4 | Go to Diagnostic Aids |
| 4 | Turn OFF the ignition. Inspect the crankshaft balancer bolt for the proper torque. Refer to Fastener Tightening Specifications and Crankshaft Balancer Replacement . Was the crankshaft balancer bolt at the proper torque? | Go to Step 5 | Go to Crankshaft Balancer Replacement |
| 5 | Disconnect the camshaft position (CMP) actuator solenoid. Remove the CMP actuator solenoid. Refer to Camshaft Position (CMP) Actuator Solenoid Valve Replacement . Connect a fused jumper wire between battery voltage and the CMP actuator high control circuit at the solenoid. Refer to Using Fused Jumper Wires . Connect a jumper wire between the low reference circuit of the CMP actuator solenoid and a good ground. Refer to Using Connector Test Adapters . Does the pintle inside the CMP actuator solenoid move? | Go to Step 6 | Go to Step 8 |
| 6 | Inspect the CMP actuator for binding or being stuck. Refer to Camshaft Position (CMP) Actuator Diagnosis . Did you find and correct the condition? | Go to Step 9 | Go to Step 7 |
| 7 | Inspect the engine for correct valve timing. Refer to Timing Chain, Sprockets, and/or Tensioner Replacement . Did you find and correct the condition? | Go to Step 9 | Go to Diagnostic Aids |
| 8 | Replace the CMP actuator solenoid. Refer to Camshaft Position (CMP) Actuator Solenoid Valve Replacement . Did you complete the replacement? | Go to Step 9 | |
| 9 | Clear the DTCs with a scan tool. Turn OFF the ignition for 30 seconds. Start the engine. 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. Did the DTC fail this ignition? | Go to Step 2 | Go to Step 10 |
| 10 | Observe the Capture Info with a scan tool. Have any other DTCs not been diagnosed? | Go to Diagnostic Trouble Code (DTC) List - Vehicle | System OK |
DTC P0017
The number below refers to the step number on the diagnostic table.
- 9: With no fault present, the test lamp will blink once per second.
| Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
| Schematic Reference: Engine Controls Schematics Connector End View Reference: Engine Controls Connector End Views or Powertrain Control Module (PCM) Connector End Views | ||||
| 1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information | |
| 2 | Is DTC P0053 set? | Go to Step 4 | Go to Step 3 | |
| 3 | IMPORTANT: Whenever the heated oxygen sensor (HO2S) heaters are commanded ON with a scan tool, they will continue to be pulsed ON once per second until the ignition is turned OFF for 30 seconds. Start the engine. Command the HO2S heaters ON with a scan tool. Wait 15 seconds to allow the HO2S heater current to stabilize. Observe the affected HO2S Heater Current parameter with a scan tool. Is the HO2S Heater Current parameter within the specified range? | 0.22-1.56 A | Go to Step 5 | Go to Step 6 |
| 4 | IMPORTANT: Whenever the HO2S heaters are commanded ON with a scan tool, they will continue to be pulsed ON once per second until the ignition is turned OFF for 30 seconds. Start the engine. Command the HO2S heaters ON with a scan tool. Wait 15 seconds to allow the HO2S heater current to stabilize. Observe the affected HO2S Heater Current parameter with a scan tool. Is the HO2S Heater Current parameter within the specified range? | 0.8-2.99 A | Go to Step 5 | Go to Step 6 |
| 5 | Observe the Freeze Frame/Failure Records for this DTC. Turn OFF the ignition for 30 seconds. Start the engine. 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. Did the DTC fail this ignition? | Go to Step 6 | Go to Intermittent Conditions | |
| 6 | Inspect the O2 fuse. Is the O2 fuse open? | Go to Step 7 | Go to Step 8 | |
| 7 | Test the ignition 1 voltage circuit for a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 22 | Go to Step 10 | |
| 8 | Disconnect the affected HO2S. Turn ON the ignition, with the engine OFF. Probe the ignition 1 voltage circuit of the HO2S harness connector on the engine harness side with a test lamp that is connected to a good ground. Refer to Probing Electrical Connectors in Wiring Systems. Does the test lamp illuminate? | Go to Step 9 | Go to Step 19 | |
| 9 | IMPORTANT: The test lamp may blink prior to commanding the heaters ON. This is because the heaters were commanded ON in a previous step. To command the heaters OFF, turn OFF the ignition for 30 seconds. Connect a test lamp between the ignition 1 voltage circuit of the HO2S harness connector on the engine harness side and the HO2S heater low control circuit of the HO2S harness connector on the engine harness side. Start the engine. Command the HO2S heaters ON with a scan tool. Does the test lamp blink once per second? | Go to Step 11 | Go to Step 12 | |
| 10 | IMPORTANT: Perform the following test on all HO2Ss which are supplied voltage by the suspect circuit. Test the ignition 1 voltage circuit on the sensor side of the HO2S connector for a short to ground. Refer to Circuit Testing in Wiring Systems.Is any sensor shorted to ground? | Go to Step 20 | Go to Intermittent Conditions | |
| 11 | Measure the resistance of the following circuits with a DMM: The HO2S heater low control circuit The ignition 1 voltage circuit Refer to Circuit Testing in Wiring Systems. Is the resistance of either circuit more than the specified value? | 3 ohms | Go to Step 18 | Go to Step 16 |
| 12 | Is the test lamp on steady? | Go to Step 13 | Go to Step 14 | |
| 13 | Test the HO2S heater low control circuit for a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 22 | Go to Step 17 | |
| 14 | Test the HO2S heater low control circuit for a short to voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 22 | Go to Step 15 | |
| 15 | Test the HO2S heater low control circuit for an open or high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 22 | Go to Step 17 | |
| 16 | Test for shorted terminals and for poor connections at the HO2S. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 22 | Go to Step 20 | |
| 17 | Test for shorted terminals and for poor connections at the powertrain control module (PCM). Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 22 | Go to Step 21 | |
| 18 | Repair the circuit with high resistance. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 22 | ||
| 19 | Repair the open or high resistance in the ignition 1 voltage circuit. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 22 | ||
| 20 | NOTE: Refer to Heated Oxygen Sensor (HO2S) Resistance Learn Reset Notice in Cautions and Notices. Replace the affected HO2S. Refer to Heated Oxygen Sensor Replacement - Position 1 and Heated Oxygen Sensor Replacement - Position 2 Did you complete the replacement? | Go to Step 22 | ||
| 21 | Replace the PCM. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming. Did you complete the replacement? | Go to Step 22 | ||
| 22 | Replace the O2 fuse if necessary. Clear the DTCs with a scan tool. Turn OFF the ignition for 30 seconds. Start the engine. 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. Did the DTC fail this ignition? | Go to Step 2 | Go to Step 23 | |
| 23 | Observe the Capture Info with a scan tool. Are there any DTCs that have not been diagnosed? | Go to Diagnostic Trouble Code (DTC) List - Vehicle in Vehicle DTC Information | System OK | |
| IMPORTANT |
|---|
| Whenever the heated oxygen sensor (HO2S) heaters are commanded ON with a scan tool, they will continue to be pulsed ON once per second until the ignition is turned OFF for 30 seconds. |
| IMPORTANT |
|---|
| Whenever the HO2S heaters are commanded ON with a scan tool, they will continue to be pulsed ON once per second until the ignition is turned OFF for 30 seconds. |
| IMPORTANT |
|---|
| The test lamp may blink prior to commanding the heaters ON. This is because the heaters were commanded ON in a previous step. To command the heaters OFF, turn OFF the ignition for 30 seconds. |
| IMPORTANT |
|---|
| Perform the following test on all HO2Ss which are supplied voltage by the suspect circuit. |
| NOTE |
|---|
| Refer to Heated Oxygen Sensor (HO2S) Resistance Learn Reset Notice in Cautions and Notices. |
DTC P0053 or P0054
The numbers below refer to the step numbers on the diagnostic table.
- 5: This step will determine if the manifold absolute pressure (MAP) sensor voltage is within the proper range at idle.
- 6: This step will determine if the MAP sensor responds properly to the change in manifold pressure.
- 7: A throttle blade that sticks or binds may set this code. Opening the throttle through the entire range will indicate problems such as these.
- 9: When the PCM detects a condition within the ETC system other DTCs may set due to the many redundant tests run continuously on this system. Locating and repairing 1 individual condition may correct more than 1 DTC. Keep this in mind when reviewing captured DTC info.
| Step | Action | Values | Yes | No |
|---|---|---|---|---|
| Schematic Reference: Engine Controls Schematics Connector End View Reference: Powertrain Control Module (PCM) Connector End Views or Engine Controls Connector End Views | ||||
| 1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information | |
| 2 | Are any other DTCs set? | Go to Diagnostic Trouble Code (DTC) List - Vehicle in Vehicle DTC Information | Go to Step 3 | |
| 3 | Observe the Freeze Frame/Failure Records for this DTC. Turn OFF the ignition. Start the engine. 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. Did the DTC fail this ignition? | Go to Step 4 | Go to Diagnostic Aids | |
| 4 | Inspect for the following conditions: Vacuum hoses for splits, kinks, and proper connections as shown on Vehicle Emission Control Information label-Inspect thoroughly for any type of leak or restriction. Air leaks at throttle body mounting area and intake manifold sealing surfaces Did you find and correct the condition? | Go to Step 8 | Go to Step 5 | |
| 5 | Allow the engine to reach operating temperature. Observe the MAP Sensor Voltage parameter with a scan tool. Is the manifold absolute pressure (MAP) sensor voltage within the specified range? | 0.8-4 V | Go to Step 6 | Go to DTC P0106 |
| 6 | Idle the engine. Observe the MAP Sensor kPa parameter with a scan tool. Increase the engine speed slowly and then back to idle. Does the MAP sensor kPa change smoothly and gradually as engine speed is increased and returned to idle? | Go to Step 7 | Go to DTC P0106 | |
| 7 | CAUTION: Turn OFF the ignition before inserting fingers into the throttle bore. Unexpected movement of the throttle blade could cause personal injury. Inspect the throttle body for the following conditions while modulating the throttle through the entire range using the scan tool: Loose or damaged throttle blade Broken throttle shaft Drive mechanism damage If any of these conditions exist, replace the throttle body assembly. Refer to Throttle Body Assembly Replacement . Did you find and correct the condition? | Go to Step 6 | Go to Diagnostic Aids | |
| 8 | Clear the DTCs with a scan tool. Turn OFF the ignition for 30 seconds. Start the engine. 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. Did the DTC fail this ignition? | Go to Step 2 | Go to Step 7 | |
| 9 | Observe the Capture Info with a scan tool. Are there any DTCs that have not been diagnosed? | Go to Diagnostic Trouble Code (DTC) List - Vehicle in Vehicle DTC Information | System OK | |
| CAUTION |
|---|
| Turn OFF the ignition before inserting fingers into the throttle bore. Unexpected movement of the throttle blade could cause personal injury. |
DTC P0068
The numbers below refer to the step numbers on the diagnostic table.
- 4: This step tests the MAP sensor's ability to correctly indicate BARO.
- 13: The measurement noted in this step will be used in subsequent steps if the measurement does not exceed the specified value.
- 16: This step calculates the resistance in the 5-volt reference circuit.
- 17: This step calculates the resistance in the low reference circuit.
| Step | Action | Values | Yes | No |
|---|---|---|---|---|
| Schematic Reference: Engine Controls Schematics Connector End View Reference: Engine Controls Connector End Views or Powertrain Control Module (PCM) Connector End Views | ||||
| 1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information | |
| 2 | Inspect for the following conditions: Disconnected, damaged, or incorrectly routed vacuum hoses Missing or damaged manifold absolute pressure (MAP) sensor seal Restrictions in the MAP sensor vacuum source Intake manifold vacuum leaks Did you find and correct the condition? | Go to Step 29 | Go to Step 3 | |
| 3 | IMPORTANT: The vehicle used for the comparison is not limited to the same type of vehicle as is being serviced. A vehicle known to provide an accurate reading is acceptable. Do you have access to another vehicle in which the MAP sensor pressure can be observed with a scan tool? | Go to Step 4 | Go to Step 5 | |
| 4 | Turn ON the ignition, with the engine OFF. Observe the MAP sensor pressure with a scan tool. Observe the MAP sensor pressure in the known good vehicle with a scan tool. Compare the values. Is the difference between the values less than the specified value? | 3 kPa | Go to Step 6 | Go to Step 11 |
| 5 | IMPORTANT: The Altitude vs. Barometric Pressure table indicates a pressure range for a given altitude under normal weather conditions. Weather conditions consisting of very low or very high pressure and/or very low or very high temperature may cause a reading to be slightly out of range. Turn ON the ignition, with the engine OFF. Observe the MAP sensor pressure with a scan tool. Refer to Altitude vs Barometric Pressure . The MAP sensor pressure should be within the range specified for your altitude. Does the MAP sensor indicate the correct barometric pressure? | Go to Step 6 | Go to Step 11 | |
| 6 | Observe the MAP sensor pressure with a scan tool. Start the engine. Does the MAP sensor pressure change? | Go to Step 7 | Go to Step 11 | |
| 7 | Turn OFF the ignition. Remove the MAP sensor from the engine vacuum source. Leave the MAP sensor connected to the engine harness. Connect a J 23738-A Mityvac to the MAP sensor. See Special Tools . Turn ON the ignition, with the engine OFF. Observe the MAP sensor pressure with the scan tool. Apply vacuum to the MAP sensor with the J 23738-A in 1 inch Hg increments until 15 inches Hg is reached. See Special Tools . Each 1 inch Hg should decrease MAP sensor pressure by 3-4 kPa. Is the decrease in MAP sensor pressure consistent? | Go to Step 8 | Go to Step 11 | |
| 8 | Apply vacuum with the J 23738-A until 20 inches Hg is reached. See Special Tools . Is the MAP sensor pressure less than the specified value? | 34 kPa | Go to Step 9 | Go to Step 11 |
| 9 | Disconnect the J 23738-A from the MAP sensor. See Special Tools . Does the MAP sensor pressure return to the value observed in step 4 or 5? | Go to Step 10 | Go to Step 27 | |
| 10 | Inspect for the following conditions: Incorrect cam timing-Refer to Camshaft Position (CMP) Actuator Diagnosis or Timing Chain, Sprockets, and/or Tensioner Replacement in Engine Mechanical for the correct timing. Restricted exhaust flow-Refer to Restricted Exhaust in Engine Exhaust. Worn piston rings-Refer to Engine Compression Test in Engine Mechanical. Did you find and correct the condition? | Go to Step 29 | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | |
| 11 | Test for an intermittent and for a poor connection at the MAP sensor. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 29 | Go to Step 12 | |
| 12 | Disconnect the MAP sensor electrical connector. Observe the MAP sensor parameter with the scan tool. Is the voltage less than the specified value? | 0.3 V | Go to Step 13 | Go to Step 19 |
| 13 | Measure the voltage from the 5-volt reference circuit of the MAP sensor to a good ground with a DMM. Refer to Circuit Testing in Wiring Systems. Note the measurement as Supply voltage. Is the voltage greater than the specified value? | 5.2 V | Go to Step 20 | Go to Step 14 |
| 14 | Is the voltage greater than the specified value? | 4.8 V | Go to Step 15 | Go to Step 21 |
| 15 | Connect a test lamp and a DMM in series between the 5-volt reference circuit and the low reference circuit of the MAP sensor, at the harness connector. Measure the amperage, with the DMM. Note the measurement as Amperage. Is the amperage equal to the specified value? | 0 mA | Go to Step 24 | Go to Step 16 |
| 16 | Remove the DMM from the circuit. Connect the test lamp between the 5-volt reference circuit and the low reference circuit of the MAP sensor, at the harness connector. Measure the voltage from the 5-volt reference circuit at the test lamp to a good ground, with the DMM. Note the measurement as Load voltage drop. IMPORTANT: Before any calculations are performed, ensure that all measurements are converted to like units, for example, volts/amps or millivolts/milliamps. Subtract the Load voltage drop from the Supply voltage. Note the result as Supply voltage drop. Divide the Supply voltage drop by the Amperage. Is the result more than the specified value? | 5 ohms | Go to Step 22 | Go to Step 17 |
| 17 | Measure the voltage from the low reference circuit of the MAP sensor at the test lamp to a good ground, with the DMM. Note the result as Low reference voltage drop. IMPORTANT: Before any calculations are performed, ensure that all measurements are converted to like units, for example, volts/amps or millivolts/milliamps. Divide the Low reference voltage drop by the Amperage. Is the result greater than the specified value? | 5 ohms | Go to Step 25 | Go to Step 18 |
| 18 | Remove the test lamp. Connect a 3-amp fused jumper wire between the 5-volt reference circuit and the signal circuit of the MAP sensor at the harness connector. Observe the MAP sensor parameter with the scan tool. Is the voltage greater than the specified value? | 4.9 V | Go to Step 27 | Go to Step 23 |
| 19 | Test the MAP sensor signal circuit between the powertrain control module (PCM) and the MAP sensor for a short to voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 29 | Go to Step 26 | |
| 20 | Test all branches of the 5-volt reference circuit that is shared with the MAP sensor for a short to voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 29 | Go to Step 26 | |
| 21 | Test the 5-volt reference circuit between the PCM and the MAP sensor for an open or a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 29 | Go to Step 26 | |
| 22 | Test the 5-volt reference circuit between the PCM and the MAP sensor for high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 29 | Go to Step 26 | |
| 23 | Test the MAP sensor signal circuit between the PCM and the MAP sensor for an open, a high resistance, or a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 29 | Go to Step 26 | |
| 24 | Test the low reference circuit between the PCM and the MAP sensor for an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 29 | Go to Step 26 | |
| 25 | Test the low reference circuit between the PCM and the MAP sensor for high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 29 | Go to Step 26 | |
| 26 | Test for shorted terminals and for poor connections at the PCM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 29 | Go to Step 28 | |
| 27 | Replace the MAP sensor. Refer to Manifold Absolute Pressure (MAP) Sensor Replacement . Did you complete the replacement? | Go to Step 29 | ||
| 28 | Replace the PCM. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming. Did you complete the replacement? | Go to Step 29 | ||
| 29 | Clear the DTCs with the scan tool. Turn OFF the ignition for 30 seconds. Start the engine. 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. Did the DTC fail this ignition? | Go to Step 2 | Go to Step 30 | |
| 30 | Observe the Capture Info with a scan tool. Have any other DTCs not been diagnosed? | Go to Diagnostic Trouble Code (DTC) List - Vehicle in Vehicle DTC Information | System OK | |
| IMPORTANT |
|---|
| The vehicle used for the comparison is not limited to the same type of vehicle as is being serviced. A vehicle known to provide an accurate reading is acceptable. |
| IMPORTANT |
|---|
| The Altitude vs. Barometric Pressure table indicates a pressure range for a given altitude under normal weather conditions. Weather conditions consisting of very low or very high pressure and/or very low or very high temperature may cause a reading to be slightly out of range. |
| IMPORTANT |
|---|
| Before any calculations are performed, ensure that all measurements are converted to like units, for example, volts/amps or millivolts/milliamps. |
| IMPORTANT |
|---|
| Before any calculations are performed, ensure that all measurements are converted to like units, for example, volts/amps or millivolts/milliamps. |
DTC P0106
The number below refers to the step number on the diagnostic table.
- 6: This step tests for the proper operation of the circuit in the low voltage range.
| Step | Action | Values | Yes | No |
|---|---|---|---|---|
| Schematic Reference: Engine Controls Schematics Connector End View Reference: Powertrain Control Module (PCM) Connector End Views or Engine Controls Connector End Views | ||||
| 1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle | |
| 2 | Turn ON the ignition, with the engine OFF. Observe the intake air temperature (IAT) sensor parameter with a scan tool. Is the IAT sensor parameter less than the specified value? | 39°C (-38°F) | Go to Step 4 | Go to Step 3 |
| 3 | Observe the Freeze Frame/Failure Records for this DTC. Turn OFF the ignition for 30 seconds. Start the engine. 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. Did the DTC fail this ignition? | Go to Step 4 | Go to Testing for Intermittent Conditions and Poor Connections | |
| 4 | Disconnect the IAT sensor. Connect a DMM between the signal circuit of the IAT sensor and a good ground. Refer to Circuit Testing . Is the voltage more than the specified value? | 5.2 V | Go to Step 5 | Go to Step 6 |
| 5 | IMPORTANT: The sensor may be damaged if the circuit is shorted to a voltage source. Test the signal circuit for a short to voltage. Refer to Circuit Testing and Wiring Repairs .Did you find and correct the condition? | Go to Step 15 | Go to Step 12 | |
| 6 | Connect a 3-amp fused jumper wire between the signal circuit of the IAT sensor and the low reference circuit of the IAT sensor. Refer to Using Fused Jumper Wires . Observe the IAT sensor parameter with a scan tool. Is the IAT sensor parameter more than the specified value? | 128°C (262°F) | Go to Step 10 | Go to Step 7 |
| 7 | Connect a 3-amp fused jumper wire between the signal circuit of the IAT sensor and a good ground. Refer to Using Fused Jumper Wires . Observe the IAT sensor parameter with a scan tool. Is the IAT sensor parameter more than the specified value? | 128°C (262°F) | Go to Step 9 | Go to Step 8 |
| 8 | Test the signal circuit of the IAT sensor for an open circuit or high resistance. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | Go to Step 15 | Go to Step 12 | |
| 9 | Test the IAT sensor low reference circuit for high resistance or an open. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | Go to Step 15 | Go to Step 12 | |
| 10 | Test the IAT signal circuit for a short to any 5-volt reference circuit. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | Go to Step 15 | Go to Step 11 | |
| 11 | IMPORTANT: The sensor may be damaged if the circuit is shorted to a voltage source. Test for an intermittent and for a poor connection at the IAT sensor. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs .Did you find and correct the condition? | Go to Step 15 | Go to Step 13 | |
| 12 | Test for an intermittent and for a poor connection at the powertrain control module (PCM). Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition? | Go to Step 15 | Go to Step 14 | |
| 13 | Replace the IAT sensor. Refer to Intake Air Temperature (IAT) Sensor Replacement . Did you complete the replacement? | Go to Step 15 | ||
| 14 | Replace the PCM. Refer to Control Module References for replacement, setup, and programming. Did you complete the replacement? | Go to Step 15 | ||
| 15 | Clear the DTCs with a scan tool. Turn OFF the ignition for 30 seconds. Start the engine. 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. Did the DTC fail this ignition? | Go to Step 2 | Go to Step 16 | |
| 16 | Observe the Capture Info with a scan tool. Are there any DTCs that have not been diagnosed? | Go to Diagnostic Trouble Code (DTC) List - Vehicle | System OK | |
| IMPORTANT |
|---|
| The sensor may be damaged if the circuit is shorted to a voltage source. |
| IMPORTANT |
|---|
| The sensor may be damaged if the circuit is shorted to a voltage source. |
DTC P0113
The numbers below refer to the step numbers on the diagnostic table.
- 2: An HO2S heater fault may set this DTC.
- 3: If the voltage is varying above and below the specified value, the condition is not present.
| Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
| Schematic Reference: Engine Controls Schematics Connector End View Reference: Engine Controls Connector End Views or Powertrain Control Module (PCM) Connector End Views | ||||
| 1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information | |
| 2 | Start the engine. Command the heated oxygen sensor (HO2S) 1 heater ON with a scan tool. Wait 15 seconds to allow the HO2S 1 heater current to stabilize. Observe the HO2S 1 Heater Current parameter with a scan tool. Is the HO2S 1 Heater Current parameter within the specified range? | 0.80-2.99 A | Go to Step 3 | Go to DTC P0135 or P0141 |
| 3 | Allow the engine to reach operating temperature. Refer to Scan Tool Data List . Operate the engine at 2,000 RPM for 30 seconds. Observe the HO2S 1 Voltage parameter with a scan tool. Is the HO2S 1 Voltage parameter varying above and below the specified range? | 300-600 mV | Go to Step 4 | Go to Step 5 |
| 4 | Observe the Freeze Frame/Failure Records for this DTC. Turn OFF the ignition for 30 seconds. Start the engine. 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. Did the DTC fail this ignition? | Go to Step 5 | Go to Intermittent Conditions | |
| 5 | Turn OFF the ignition. Disconnect the HO2S 1. Turn ON the ignition, with the engine OFF. Observe the HO2S 1 Voltage parameter with a scan tool. Is the HO2S 1 Voltage parameter more than the specified value? | 800 mV | Go to Step 6 | Go to Step 7 |
| 6 | IMPORTANT: The normal voltage on the high signal circuit is between 400-500 mV. IMPORTANT: The sensor may be damaged if the circuit is shorted to a voltage source. Test the HO2S 1 high signal circuit for a short to voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.Did you find and correct the condition? | Go to Step 18 | Go to Step 17 | |
| 7 | Connect a 3-amp fused jumper wire between the high signal circuit of the HO2S 1 harness connector on the engine harness side and the low signal circuit of the HO2S 1 harness connector on the engine harness side. Observe the HO2S 1 Voltage parameter with a scan tool. Is the HO2S 1 Voltage parameter within the specified range? | 400-500 mV | Go to Step 9 | Go to Step 8 |
| 8 | Remove the jumper wire from the previous step. Test the HO2S 1 heater low control circuit for a short to one of the following circuits: The HO2S 1 low signal circuit The HO2S 1 high signal circuit Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 18 | Go to Step 14 | |
| 9 | Remove the jumper wire from the previous step. Connect a 3-amp fused jumper wire from the high signal circuit of the HO2S 1 harness connector on the engine harness side and ground. Observe the HO2S 1 Voltage parameter with a scan tool. Is the HO2S 1 Voltage parameter within the specified range? | 400-500 mV | Go to Step 11 | Go to Step 10 |
| 10 | Remove the jumper wire from the previous step. Test the HO2S low signal circuit for an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 18 | Go to Step 15 | |
| 11 | Remove the jumper from the previous step. Measure the voltage from the high signal circuit of the HO2S 1 harness connector on the engine harness side to a good ground with a DMM. Refer to Circuit Testing in Wiring Systems. Is the voltage more than the specified value? | 1.0 V | Go to Step 12 | Go to Step 13 |
| 12 | IMPORTANT: The normal voltage on the low signal circuit is between 20-100 mV. Test the HO2S 1 low signal circuit for a short to voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.Did you find and correct the condition? | Go to Step 18 | Go to Step 17 | |
| 13 | Test the HO2S 1 high signal circuit for an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 18 | Go to Step 15 | |
| 14 | Test for an intermittent and for a poor connection at the HO2S 1. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 18 | Go to Step 16 | |
| 15 | Test for an intermittent and for a poor connection at the powertrain control module (PCM). Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 18 | Go to Step 17 | |
| 16 | NOTE: Refer to Heated Oxygen Sensor (HO2S) Resistance Learn Reset Notice in Cautions and Notices. Replace the HO2S 1. Refer to Heated Oxygen Sensor Replacement - Position 1 .Did you complete the replacement? | Go to Step 18 | ||
| 17 | Replace the PCM. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming. Did you complete the replacement? | Go to Step 18 | ||
| 18 | Clear the DTCs with a scan tool. Turn OFF the ignition for 30 seconds. Start the engine. 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. Did the DTC fail this ignition? | Go to Step 2 | Go to Step 19 | |
| 19 | Observe the Capture Info with a scan tool. Are there any DTCs that have not been diagnosed? | Go to Diagnostic Trouble Code (DTC) List - Vehicle in Vehicle DTC Information | System OK | |
| IMPORTANT |
|---|
| The normal voltage on the high signal circuit is between 400-500 mV. |
| IMPORTANT |
|---|
| The sensor may be damaged if the circuit is shorted to a voltage source. |
| IMPORTANT |
|---|
| The normal voltage on the low signal circuit is between 20-100 mV. |
| NOTE |
|---|
| Refer to Heated Oxygen Sensor (HO2S) Resistance Learn Reset Notice in Cautions and Notices. |
DTC P0130
The numbers below refer to the step numbers on the diagnostic table.
- 2: When the system is operating correctly, the HO2S 1 voltage should toggle above and below the bias voltage. You may need to operate the vehicle within the Freeze Frame conditions and Conditions for Setting the DTC in order to duplicate the malfunction that was detected by the PCM.
- 4: The specified value is what is measured on a correctly operating system.
| Step | Action | Values | Yes | No |
|---|---|---|---|---|
| Schematic Reference: Engine Controls Schematics Connector End View Reference: Powertrain Control Module (PCM) Connector End Views or Engine Controls Connector End Views | ||||
| 1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information | |
| 2 | Operate the engine at normal operating temperature. Operate the engine above 1,200 RPM for 2 minutes. Observe the Heated Oxygen Sensor (HO2S) 1 Voltage parameter with a scan tool. Does the scan tool indicate that the HO2S 1 voltage is less than the specified value? | 52 mV | Go to Step 4 | Go to Step 3 |
| 3 | Observe the Freeze Frame/Failure Records for this DTC. Turn OFF the ignition for 30 seconds. Start the engine. 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. Did the DTC fail this ignition? | Go to Step 4 | Go to Intermittent Conditions | |
| 4 | Turn OFF the ignition. Disconnect the HO2S sensor. Turn ON the ignition, with the engine OFF. Measure the voltage of the HO2S 1 high signal circuit on the powertrain control module (PCM) side with a DMM. Does the voltage measure within the specified range? | 350-550 mV | Go to Step 6 | Go to Step 5 |
| 5 | Test the HO2S 1 high signal circuit for a short to ground or a short to the HO2S 1 low signal circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 11 | Go to Step 8 | |
| 6 | The HO2S 1 is detecting a lean condition or may be contaminated. Inspect for the following conditions: HO2S connector water intrusion Silicon-contaminated HO2S An exhaust leak between the HO2S 1 and the engine-Refer to Exhaust Leakage in Engine Exhaust. Vacuum leaks Incorrect fuel pressure-Refer to Fuel System Diagnosis . Lean fuel injectors-Refer to Fuel Injector Balance Test with Tech 2 . Repair any of the above or similar engine conditions as necessary. Did you find and correct the condition? | Go to Step 11 | Go to Step 7 | |
| 7 | Inspect for poor connections at the harness connector of the HO2S 1 sensor. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 11 | Go to Step 9 | |
| 8 | Inspect for poor connections at the harness connector of the PCM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 11 | Go to Step 10 | |
| 9 | NOTE: Refer to Heated Oxygen Sensor (HO2S) Resistance Learn Reset Notice in Cautions and Notices. IMPORTANT: Before replacing the HO2S determine and remove any source of contamination. Replace the HO2S 1. Refer to Heated Oxygen Sensor Replacement - Position 1 .Did you complete the replacement? | Go to Step 11 | ||
| 10 | Replace the PCM. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming. Did you complete the replacement? | Go to Step 11 | ||
| 11 | Clear the DTCs with a scan tool. Turn OFF the ignition for 30 seconds. Start the engine. 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. Did the DTC fail this ignition? | Go to Step 2 | Go to Step 12 | |
| 12 | Observe the Capture Info with a scan tool. Are there any DTCs that have not been diagnosed? | Go to Diagnostic Trouble Code (DTC) List - Vehicle in Vehicle DTC Information | System OK | |
| NOTE |
|---|
| Refer to Heated Oxygen Sensor (HO2S) Resistance Learn Reset Notice in Cautions and Notices. |
| IMPORTANT |
|---|
| Before replacing the HO2S determine and remove any source of contamination. |
DTC P0131
The numbers below refer to the step numbers on the diagnostic table.
- 2: When the system is operating correctly, the HO2S 1 voltage should toggle above and below the bias voltage. You may need to operate the vehicle within the Freeze Frame conditions and Conditions for Setting the DTC in order to duplicate the malfunction that was detected by the PCM.
- 4: The specified value is what is measured on a correctly operating system.
| Step | Action | Values | Yes | No |
|---|---|---|---|---|
| Schematic Reference: Engine Controls Schematics Connector End View Reference: Powertrain Control Module (PCM) Connector End Views or Engine Controls Connector End Views | ||||
| 1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information | |
| 2 | Operate the engine at normal operating temperature. Operate the engine above 1,200 RPM for 2 minutes. Observe the Heated Oxygen Sensor (HO2S) 1 Voltage parameter with a scan tool. Does the scan tool indicate that the HO2S voltage is more than the specified value? | 946 mV | Go to Step 4 | Go to Step 3 |
| 3 | Observe the Freeze Frame/Failure Records for this DTC. Turn OFF the ignition for 30 seconds. Start the engine. 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. Did the DTC fail this ignition? | Go to Step 4 | Go to Intermittent Conditions | |
| 4 | Turn OFF the ignition. Disconnect the HO2S 1 sensor. Turn ON the ignition, with the engine OFF. Measure the voltage of the HO2S 1 high signal circuit on the powertrain control module (PCM) side with the DMM. Does the voltage measure within the specified range? | 350-550 mV | Go to Step 6 | Go to Step 5 |
| 5 | Test the HO2S 1 high signal circuit for a short to voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 11 | Go to Step 8 | |
| 6 | The HO2S 1 is detecting a rich condition or may be contaminated. Inspect for the following conditions: HO2S connector water intrusion Silicon-contaminated HO2S 1 Fuel-contaminated engine oil Incorrect fuel pressure-Refer to Fuel System Diagnosis . An inaccurate manifold absolute pressure (MAP) sensor-Refer to Scan Tool Data List . A leaking fuel pressure regulator-Refer to Fuel System Diagnosis . Rich fuel injectors-Refer to Fuel Injector Balance Test with Tech 2 . Repair any of the above or similar engine conditions as necessary. Did you find and correct the condition? | Go to Step 11 | Go to Step 7 | |
| 7 | Inspect for poor connections at the harness connector of the HO2S 1 sensor. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 11 | Go to Step 9 | |
| 8 | Inspect for poor connections at the harness connector of the PCM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 11 | Go to Step 10 | |
| 9 | NOTE: Refer to Heated Oxygen Sensor (HO2S) Resistance Learn Reset Notice in Cautions and Notices. IMPORTANT: Before replacing a contaminated HO2S determine and repair the cause of the contamination. Replace the HO2S 1. Refer to Heated Oxygen Sensor Replacement - Position 1 .Did you complete the replacement? | Go to Step 11 | ||
| 10 | Replace the PCM. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming. Did you complete the replacement? | Go to Step 11 | ||
| 11 | Clear the DTCs with a scan tool. Turn OFF the ignition for 30 seconds. Start the engine. 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. Did the DTC fail this ignition? | Go to Step 2 | Go to Step 12 | |
| 12 | Observe the Capture Info with a scan tool. Are there any DTCs that have not been diagnosed? | Go to Diagnostic Trouble Code (DTC) List - Vehicle in Vehicle DTC Information | System OK | |
| NOTE |
|---|
| Refer to Heated Oxygen Sensor (HO2S) Resistance Learn Reset Notice in Cautions and Notices. |
| IMPORTANT |
|---|
| Before replacing a contaminated HO2S determine and repair the cause of the contamination. |
DTC P0132
The number below refers to the step number on the diagnostic table.
- 2: If the voltage is varying above and below the specified value, the condition is not present.
| Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
| Schematic Reference: Engine Controls Schematics Connector End View Reference: Powertrain Control Module (PCM) Connector End Views or Engine Controls Connector End Views | ||||
| 1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information | |
| 2 | IMPORTANT: If DTC P0135 is set, diagnose that DTC first. Refer to Diagnostic Trouble Code (DTC) List - Vehicle in Vehicle DTC Information. Start the engine. Allow the engine to reach operating temperature. Refer to Scan Tool Data List . Operate the engine at 1,500 RPM for 30 seconds. Observe the Heated Oxygen Sensor (HO2S) 1 Voltage parameter with a scan tool. Is the HO2S 1 Voltage parameter varying above and below the specified range? | 350-650 mV | Go to Step 3 | Go to Step 4 |
| 3 | Observe the Freeze Frame/Failure Records for this DTC. Turn OFF the ignition for 30 seconds. Start the engine. 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. Did the DTC fail this ignition? | Go to Step 4 | Go to Intermittent Conditions | |
| 4 | Turn OFF the ignition. Disconnect the HO2S 1. Connect a 3-amp fused jumper wire between the high signal circuit of the HO2S 1 harness connector on the engine harness side and a good ground. Turn ON the ignition, with the engine OFF. Observe the HO2S 1 Voltage parameter with a scan tool. Is the HO2S 1 Voltage parameter less than the specified range? | 100 mV | Go to Step 6 | Go to Step 5 |
| 5 | Test the HO2S 1 high signal circuit for an open or high resistance. Refer to the following in Wiring Systems: Circuit Testing Heated Oxygen Sensor (HO2S) Wiring Repairs Wiring Repairs Did you find and correct the condition? | Go to Step 12 | Go to Step 9 | |
| 6 | Remove the jumper wire from the previous step. Connect a 3-amp fused jumper wire between the high signal circuit of the HO2S 1 harness connector on the engine harness side and the low signal circuit of the HO2S 1 harness connector on the engine harness side. Observe the HO2S 1 Voltage parameter with a scan tool. Is the HO2S 1 Voltage parameter less than the specified value? | 100 mV | Go to Step 8 | Go to Step 7 |
| 7 | Test the HO2S 1 low signal circuit for an open or high resistance. Refer to the following in Wiring Systems: Circuit Testing Heated Oxygen Sensor (HO2S) Wiring Repairs Wiring Repairs Did you find and correct the condition? | Go to Step 12 | Go to Step 9 | |
| 8 | Test for shorted terminals and for poor connections at the HO2S 1. Refer to the following in Wiring Systems: Testing for Intermittent Conditions and Poor Connections Heated Oxygen Sensor (HO2S) Wiring Repairs Connector Repairs Did you find and correct the condition? | Go to Step 12 | Go to Step 10 | |
| 9 | Test for shorted terminals and for poor connections at the powertrain control module (PCM). Refer to the following in Wiring Systems: Testing for Intermittent Conditions and Poor Connections Heated Oxygen Sensor (HO2S) Wiring Repairs Connector Repairs Did you find and correct the condition? | Go to Step 12 | Go to Step 11 | |
| 10 | NOTE: Refer to Silicon Contamination of Heated Oxygen Sensors Notice in Cautions and Notices. NOTE: Refer to Heated Oxygen Sensor (HO2S) Resistance Learn Reset Notice in Cautions and Notices. IMPORTANT: The HO2S 1 may be damaged due to contamination. Prior to replacing the HO2S, inspect for the following sources of contamination: A silicon contaminated HO2S 1 Fuel contamination-Refer to Alcohol/Contaminants-in-Fuel Diagnosis (with Special Tool) or Alcohol/Contaminants-in-Fuel Diagnosis (without Special Tool) . Engine oil consumption-Refer to Oil Consumption Diagnosis in Engine Mechanical. Engine coolant consumption-Refer to Loss of Coolant in Engine Cooling. Replace the HO2S 1. Refer to Heated Oxygen Sensor Replacement - Position 2 or Heated Oxygen Sensor Replacement - Position 1 .Did you complete the replacement? | Go to Step 12 | ||
| 11 | Replace the PCM. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming. Did you complete the replacement? | Go to Step 12 | ||
| 12 | Clear the DTCs with a scan tool. Turn OFF the ignition for 30 seconds. Start the engine. 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. Did the DTC fail this ignition? | Go to Step 2 | Go to Step 13 | |
| 13 | Observe the Capture Info with a scan tool. Are there any DTCs that have not been diagnosed? | Go to Diagnostic Trouble Code (DTC) List - Vehicle in Vehicle DTC Information | System OK | |
| IMPORTANT |
|---|
| If DTC P0135 is set, diagnose that DTC first. Refer to Diagnostic Trouble Code (DTC) List - Vehicle in Vehicle DTC Information. |
| NOTE |
|---|
| Refer to Silicon Contamination of Heated Oxygen Sensors Notice in Cautions and Notices. |
| NOTE |
|---|
| Refer to Heated Oxygen Sensor (HO2S) Resistance Learn Reset Notice in Cautions and Notices. |
| IMPORTANT |
|---|
| The HO2S 1 may be damaged due to contamination. Prior to replacing the HO2S, inspect for the following sources of contamination: A silicon contaminated HO2S 1 Fuel contamination-Refer to Alcohol/Contaminants-in-Fuel Diagnosis (with Special Tool) or Alcohol/Contaminants-in-Fuel Diagnosis (without Special Tool) . Engine oil consumption-Refer to Oil Consumption Diagnosis in Engine Mechanical. Engine coolant consumption-Refer to Loss of Coolant in Engine Cooling. |
DTC P0133
The numbers below refer to the step numbers on the diagnostic table.
- 2: An HO2S heater fault may set this DTC.
- 3: If the voltage is varying above and below the specified value, the condition is not present.
| Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
| Schematic Reference: Engine Controls Schematics Connector End View Reference: Engine Controls Connector End Views or Powertrain Control Module (PCM) Connector End Views | ||||
| 1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information | |
| 2 | Start the engine. Command the heated oxygen sensor (HO2S) 1 heater ON with a scan tool. Wait 15 seconds to allow the HO2S 1 heater current to stabilize. Observe the HO2S 1 Heater Current parameter with a scan tool. Is the HO2S 1 Heater Current parameter within the specified range? | 0.80-2.99 A | Go to Step 3 | Go to DTC P0135 or P0141 |
| 3 | Allow the engine to reach operating temperature. Refer to Scan Tool Data List . Operate the engine at 2,000 RPM for 30 seconds. Observe the HO2S 1 Voltage parameter with a scan tool. Is the HO2S 1 Voltage parameter varying above and below the specified range? | 400-500 mV | Go to Step 4 | Go to Step 5 |
| 4 | Observe the Freeze Frame/Failure Records for this DTC. Turn OFF the ignition for 30 seconds. Start the engine. 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. Did the DTC fail this ignition? | Go to Step 5 | Go to Intermittent Conditions | |
| 5 | Turn OFF the ignition. Disconnect the HO2S 1. Turn ON the ignition, with the engine OFF. Observe the HO2S 1 Voltage parameter with a scan tool. Is the HO2S 1 Voltage parameter more than the specified value? | 800 mV | Go to Step 6 | Go to Step 7 |
| 6 | IMPORTANT: The normal voltage on the high signal circuit is between 400-500 mV. IMPORTANT: The sensor may be damaged if the circuit is shorted to a voltage source. Test the HO2S 1 high signal circuit for a short to voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.Did you find and correct the condition? | Go to Step 18 | Go to Step 17 | |
| 7 | Connect a 3-amp fused jumper wire between the high signal circuit of the HO2S 1 harness connector on the engine harness side and the low signal circuit of the HO2S 1 harness connector on the engine harness side. Observe the HO2S 1 Voltage parameter with a scan tool. Is the HO2S 1 Voltage parameter within the specified range? | 400-500 mV | Go to Step 9 | Go to Step 8 |
| 8 | Remove the jumper wire from the previous step. Test the HO2S 1 heater low control circuit for a short to one of the following circuits: The HO2S 1 low signal circuit The HO2S 1 high signal circuit Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 18 | Go to Step 14 | |
| 9 | Remove the jumper wire from the previous step. Connect a 3-amp fused jumper wire from the high signal circuit of the HO2S 1 harness connector on the engine harness side and ground. Observe the HO2S 1 Voltage parameter with a scan tool. Is the HO2S 1 Voltage parameter within the specified range? | 400-500 mV | Go to Step 11 | Go to Step 10 |
| 10 | Remove the jumper wire from the previous step. Test the HO2S 1 low signal circuit for an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 18 | Go to Step 15 | |
| 11 | Remove the jumper from the previous step. Measure the voltage from the high signal circuit of the HO2S 1 harness connector on the engine harness side to a good ground with a DMM. Refer to Circuit Testing in Wiring Systems. Is the voltage more than the specified value? | 1.0 V | Go to Step 12 | Go to Step 13 |
| 12 | IMPORTANT: The normal voltage on the low signal circuit is between 20-100 mV. Test the HO2S 1 low signal circuit for a short to voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.Did you find and correct the condition? | Go to Step 18 | Go to Step 17 | |
| 13 | Test the HO2S 1 high signal circuit for an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 18 | Go to Step 15 | |
| 14 | Test for an intermittent and for a poor connection at the HO2S 1. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 18 | Go to Step 16 | |
| 15 | Test for an intermittent and for a poor connection at the powertrain control module (PCM). Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 18 | Go to Step 17 | |
| 16 | NOTE: Refer to Heated Oxygen Sensor (HO2S) Resistance Learn Reset Notice in Cautions and Notices. Replace the HO2S 1. Refer to Heated Oxygen Sensor Replacement - Position 1 .Did you complete the replacement? | Go to Step 18 | ||
| 17 | Replace the PCM. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming. Did you complete the replacement? | Go to Step 18 | ||
| 18 | Clear the DTCs with a scan tool. Turn OFF the ignition for 30 seconds. Start the engine. 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. Did the DTC fail this ignition? | Go to Step 2 | Go to Step 19 | |
| 19 | Observe the Capture Info with a scan tool. Are there any DTCs that have not been diagnosed? | Go to Diagnostic Trouble Code (DTC) List - Vehicle in Vehicle DTC Information | System OK | |
| IMPORTANT |
|---|
| The normal voltage on the high signal circuit is between 400-500 mV. |
| IMPORTANT |
|---|
| The sensor may be damaged if the circuit is shorted to a voltage source. |
| IMPORTANT |
|---|
| The normal voltage on the low signal circuit is between 20-100 mV. |
| NOTE |
|---|
| Refer to Heated Oxygen Sensor (HO2S) Resistance Learn Reset Notice in Cautions and Notices. |
DTC P0134
The number below refers to the step number on the diagnostic table.
- 2: When the system is operating correctly, the HO2S 2 voltage should toggle above and below the bias voltage.
| Step | Action | Values | Yes | No |
|---|---|---|---|---|
| Schematic Reference: Engine Controls Schematics Connector End View Reference: Powertrain Control Module (PCM) Connector End Views or Engine Controls Connector End Views | ||||
| 1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information | |
| 2 | Operate the engine at normal operating temperature. Operate the engine above 1,200 RPM for 2 minutes. Observe the Heated Oxygen Sensor (HO2S) 2 Voltage parameter with the scan tool. Does the scan tool indicate that the HO2S 2 voltage is less than the specified value? | 43 mV | Go to Step 4 | Go to Step 3 |
| 3 | Observe the Freeze Frame/Failure Records for this DTC. Turn OFF the ignition for 30 seconds. Start the engine. 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. Did the DTC fail this ignition? | Go to Step 4 | Go to Intermittent Conditions | |
| 4 | Turn OFF the ignition. Disconnect the HO2S 2 sensor. Turn ON the ignition, with the engine OFF. Measure the voltage of the HO2S 2 high signal circuit on the powertrain control module (PCM) side with the DMM. Does the voltage measure within the specified value? | 350-550 mV | Go to Step 6 | Go to Step 5 |
| 5 | Test the HO2S 2 high signal circuit for a short to ground or a short to the low signal circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 11 | Go to Step 8 | |
| 6 | The HO2S 2 may be detecting a lean exhaust condition. Check for one of the following conditions: HO2S connector water intrusion An exhaust leak between the HO2S 2 and the engine-Refer to Exhaust Leakage in Engine Exhaust. Vacuum leaks Incorrect fuel pressure-Refer to Fuel System Diagnosis . Lean fuel injectors-Refer to Fuel Injector Balance Test with Tech 2 . An inaccurate mass air flow (MAF) sensor Repair any of the above or similar engine conditions as necessary. Did you find and correct the condition? | Go to Step 11 | Go to Step 7 | |
| 7 | Inspect for poor connections at the harness connector of the HO2S 2 sensor. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 11 | Go to Step 9 | |
| 8 | Inspect for poor connections at the harness connector of the PCM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 11 | Go to Step 10 | |
| 9 | NOTE: Refer to Heated Oxygen Sensor (HO2S) Resistance Learn Reset Notice in Cautions and Notices. Replace the HO2S 2. Refer to Heated Oxygen Sensor Replacement - Position 2 .Did you complete the replacement? | Go to Step 11 | ||
| 10 | Replace the PCM. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming. Did you complete the replacement? | Go to Step 11 | ||
| 11 | Clear the DTCs with a scan tool. Turn OFF the ignition for 30 seconds. Start the engine. 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. Did the DTC fail this ignition? | Go to Step 2 | Go to Step 12 | |
| 12 | Observe the Capture Info with a scan tool. Are there any DTCs that have not been diagnosed? | Go to Diagnostic Trouble Code (DTC) List - Vehicle in Vehicle DTC Information | System OK | |
| NOTE |
|---|
| Refer to Heated Oxygen Sensor (HO2S) Resistance Learn Reset Notice in Cautions and Notices. |
DTC P0137
The numbers below refer to the step numbers on the diagnostic table.
- 2: When the system is operating correctly, the HO2S 2 voltage should toggle above and below the bias voltage.
- 5: This step tests the HO2S 2 high signal circuit for a short to voltage.
| Step | Action | Values | Yes | No |
|---|---|---|---|---|
| Schematic Reference: Engine Controls Schematics Connector End View Reference: Powertrain Control Module (PCM) Connector End Views or Engine Controls Connector End Views | ||||
| 1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information | |
| 2 | Operate the engine at normal operating temperature. Operate the engine above 1,200 RPM for 2 minutes. Observe the Heated Oxygen Sensor (HO2S) 2 Voltage parameter with the scan tool. Does the scan tool indicate that the HO2S 2 voltage is more than the specified value? | 1,042 mV | Go to Step 4 | Go to Step 3 |
| 3 | Observe the Freeze Frame/Failure Records for this DTC. Turn OFF the ignition for 30 seconds. Start the engine. 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. Did the DTC fail this ignition? | Go to Step 4 | Go to Intermittent Conditions | |
| 4 | Turn OFF the ignition. Disconnect the HO2S 2 sensor. Turn ON the ignition, with the engine OFF. Measure the voltage of the HO2S 2 high signal circuit on the powertrain control module (PCM) side with the DMM. Does the voltage measure within the specified value? | 350-550 mV | Go to Step 6 | Go to Step 5 |
| 5 | Test the HO2S 2 high signal circuit for a short to voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 11 | Go to Step 8 | |
| 6 | The HO2S 2 is detecting a rich exhaust condition or may be contaminated. Inspect for one of the following conditions: HO2S connector water intrusion A silicon-contaminated HO2S 2 Fuel-contaminated engine oil Incorrect fuel pressure-Refer to Fuel System Diagnosis . A leaking fuel pressure regulator-Refer to Fuel System Diagnosis . Rich fuel injectors-Refer to Fuel Injector Balance Test with Tech 2 . Repair any of the above or similar engine conditions as necessary. Did you find and correct the condition? | Go to Step 11 | Go to Step 7 | |
| 7 | Inspect for poor connections at the harness connector of the HO2S 2. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 11 | Go to Step 9 | |
| 8 | Inspect for poor connections at the harness connector of the PCM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 11 | Go to Step 10 | |
| 9 | NOTE: Refer to Heated Oxygen Sensor (HO2S) Resistance Learn Reset Notice in Cautions and Notices. IMPORTANT: Before replacing a contaminated HO2S, determine and repair the cause of the contamination. Replace the HO2S 2. Refer to Heated Oxygen Sensor Replacement - Position 2 .Did you complete the replacement? | Go to Step 11 | ||
| 10 | Replace the PCM. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming. Did you complete the replacement? | Go to Step 11 | ||
| 11 | Clear the DTCs with a scan tool. Turn OFF the ignition for 30 seconds. Start the engine. 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. Did the DTC fail this ignition? | Go to Step 2 | Go to Step 12 | |
| 12 | Observe the Capture Info with a scan tool. Are there any DTCs that have not been diagnosed? | Go to Diagnostic Trouble Code (DTC) List - Vehicle in Vehicle DTC Information | System OK | |
| NOTE |
|---|
| Refer to Heated Oxygen Sensor (HO2S) Resistance Learn Reset Notice in Cautions and Notices. |
| IMPORTANT |
|---|
| Before replacing a contaminated HO2S, determine and repair the cause of the contamination. |
DTC P0138
See also:
• Scan Tool Data List