Signal Too Low. Intermittent Fault

Checking Wiring And Connections
- 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 engine control module # A34 for an intermittent short-circuit to ground.
- Check cable between idle air control (IAC) valve terminal 3 and engine control module # A11 for an intermittent short-circuit to closing coil signal cable.

Then continue with:
^ Proceed to test step below.

Fault-tracing Information
For intermittent faults fault-tracing is not followed by a verification because the fault is not present at this moment.