Signal Too Low. Intermittent Fault

Checking Cables and Terminals
- Check cable between front heated oxygen sensor (HO2S) terminal 4 and engine control module (ECM) # A32 for an intermittent short-circuit to ground.
- Check cable between the front heated oxygen sensor terminal 3 and engine control module # A33 and the cable between the rear heated oxygen sensor terminal 3 and engine control module # A19 for an intermittent short-circuit to ground.
- Check cable between rear heated oxygen sensor terminal 4 and control module # A34 for an intermittent short-circuit to ground.
- Proceed to: Fault-tracing Information section below.

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:
^ Proceed to: Checking Cables and Terminals section above.

No:
^ Operation done.