Faulty Signal

Faulty signal

Checking the component




- Ignition off
- Check that the front heated oxygen sensors (HO2S) bank 1 and bank 2 have not been switched (mounted in the incorrect bank of cylinders)
- Remedy as necessary.

Other information:
- To access or replace the front heated oxygen sensors (HO2S), see Heated oxygen sensor (HO2S), replacing Heated Oxygen Sensor (HO2S), Replacing.

Have the heated oxygen sensors (HO2S) been switched?

Yes - Verification

No - Checking the fuel injection system for leakage

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Checking the fuel injection system for leakage
- Check the fuel injection system for leakage
- Remedy as necessary.
If no faults are found during the checks and the fault recurs as permanent, replace both heated oxygen sensors (HO2S).

Other information:
- To access or replace the front heated oxygen sensors (HO2S), see Heated oxygen sensor (HO2S), replacing Heated Oxygen Sensor (HO2S), Replacing.


Continue - Verification

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Verification




Verification

Verification

Hint: After carrying out the repair, check that the fault has been remedied.








- Ignition off
- Reconnect the connectors, reinstall components etc.
- Start the engine. Allow the engine to idle for 10 minutes
- Read off diagnostic trouble codes (DTCs).
The fault has been remedied if status of the diagnostic trouble code (DTC) is intermittent.





Is the status of the diagnostic trouble code (DTC) intermittent?

Yes - VERIFIED

No - VERIFICATION FAILED

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VERIFICATION FAILED - Fault-tracing information

VERIFIED - Fault Found

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Fault-tracing information




Information

Fault-tracing information
The fault should have been detected and remedied. As this is not the case fault-tracing has failed.
Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.

Do you want to exit fault-tracing?

Yes - FAULT-TRACING FAILED

No - Attempt New Test

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FAULT-TRACING FAILED - FAULT-TRACING FAILED

Attempt New Test - Checking the component

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