P0132

P0132-O2 SENSOR 1/1 CIRCUIT HIGH

Special Tools:










For a complete wiring diagram, refer to the Wiring Information.

Theory of Operation

The engine after treatment system monitors the oxygen content in the diesel engine exhaust. The Powertrain Control Module (PCM) monitors the exhaust gases for oxygen content and varies the rich/lean fuel mixture of the intake air fuel mixture to adjust the system. This diagnostic monitors the status message broadcast by the Smart O2 Sensor Module for the Upstream O2 Sensor circuit. The PCM will set the fault if it receives an FMI (Failure Mode Indicator) message from the Smart O2 Sensor Module. The PCM will illuminate the MIL lamp immediately when the diagnostic runs and fails. The PCM will turn off the MIL lamp diagnostic runs and passes in four consecutive drive cycles.

- When Monitored:
When the engine is running.

- Set Condition:
The Powertrain Control Module (PCM) will set the fault if it receives an FMI (Failure Mode Indicator) message from the Smart O2 Module.





Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Pre-Diagnostic Troubleshooting Procedure.

NOTE: Before replacing any O2 Sensor or O2 Sensor Module, check after treatment wiring harness for spread terminals. For wiring harness checking procedure, DO NOT back probe, use Electric Test Tool Kit ( Tool).

1. ACTIVE DTC
1. Turn the ignition on.
2. With the scan tool, record all Freeze frame data.
3. With the scan tool, erase DTCs.
4. Turn the ignition off for 75 seconds.
5. Start the engine and let idle for up to five minutes.
6. With the scan tool, read DTCs.

Did the DTC reset?

Yes

- Go To 2

No

- Perform the INTERMITTENT CONDITION diagnostic procedure. Intermittent Condition Test

2. CHECK THE O2 SENSOR 1/1 CIRCUITS FOR A SHORT TO VOLTAGE
1. Turn the ignition off.
2. Disconnect the O2 Sensor Module harness connector.
3. Turn the ignition on.
4. Measure the voltage on the:
- (K41) O2 Sensor 1/1 Signal circuit at the Smart O2 Sensor Module harness connector.
- (K103) O2 Sensor 1/1 Pump Cell Current Trim circuit at the Smart O2 Sensor Module harness connector.
- (K89) O2 Sensor 1/1 Positive Current Control circuit at the Smart O2 Sensor Module harness connector.
- (K902) O2 Sensor 1/1 Return circuit at the Smart O2 Sensor Module harness connector.

Is there voltage present on any circuit?

Yes

- Repair the short to voltage in the circuit where voltage was present.
- Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Powertrain Verification Test.

No

- Go To 3

3. OXYGEN SENSOR SOOTED
1. Remove the O2 Sensor 1/1.
2. Carefully clean the soot from the O2 Sensor.

NOTE: Do not tap or bang sensor to remove loose debris. This will damage the sensor.

3. Reinstall the O2 Sensor 1/1.
4. With the scan tool, erase DTCs.
5. Turn the ignition off for 75 seconds.
6. Start the engine and let idle for two minutes.
7. With the scan tool, read DTCs.

Did the DTC reset?

Yes

- Go To 4

No

- Repair complete.
- Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Powertrain Verification Test.

4. OXYGEN SENSOR AND O2 SENSOR CONTROL MODULE
1. Remove the O2 Sensor 1/1 and O2 Sensor 1/2.
2. Install the O2 Sensor 1/1 in the O2 Sensor 1/2 position.
3. Install the O2 Sensor 1/2 in the O2 Sensor 1/1 position.
4. With the scan tool, erase DTCs.
5. Turn the ignition off for 75 seconds.
6. Start the engine and let idle for two minutes.
7. With the scan tool, read DTCs.

Did the DTC change to P0138?

Yes

- Reinstall the O2 Sensor 1/2 back to it's original position and replace the O2 Sensor 1/1.
- Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Powertrain Verification Test.

No

- Replace the O2 Sensor Control Module. Return the O2 Sensors back to their original positions.
- Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Powertrain Verification Test.