Signal Too High. Intermittent Fault

Checking Wiring And Connections
- Check cable between heated oxygen sensor (HO2S) terminal 2 and engine control module (ECM) # A14 (for diagnostic trouble code (DTC) EFI-521)/ # A29 (for diagnostic trouble code EFI-522) for an intermittent short-circuit to supply voltage.

Fault-tracing Information
- For intermittent faults fault-tracing is not followed by a verification because the fault is not present at this moment.
- Do you want to repeat fault-tracing?

Yes:
^ Return to Checking Wiring And Connections section above.

No:
^ Operation done