Circuit/System Verification
WARNING: This page is about a different variant/trim than selected.
- Ignition - On / Vehicle - In Service Mode
- Verify there are no DTCs set related to the following component/system: Heated Oxygen Sensor Heater
- If a related DTC is set
- Go to next step: If a related DTC is not set
- Engine - Running
- Verify the scan tool parameter: Heated Oxygen Sensor/Heated Oxygen Sensor 2 = Between Lambda 0.8 and 1.1
- If not between Lambda 0.8 and 1, 1
Refer to: Circuit/System Testing
- Go to next step: If between Lambda 0.8 and 1.1
- If not between Lambda 0.8 and 1, 1
- Verify the scan tool parameter: Heated Oxygen Sensor/Heated Oxygen Sensor 2 = The value should not spike or drop out.
Perform the action while monitoring the parameter:
- Wiggle the harness and connector: B52 Heated Oxygen Sensor
- Wiggle the harness and connector: K20 Engine Control Module
- If the value spikes or drops out
Repair as necessary - Wiring / Terminal (s) / Electrical Connector (s)
- Go to next step: If the value does not spike or drop out
- 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.
Verify the DTC does not set.
- If the DTC sets
Refer to: Circuit/System Testing
- Go to next step: If the DTC is not set
- If the DTC sets
- All OK.