P1351high severityPowertrain
IDM Input Circuit Malfunction
on 2005 Ford Explorer 4.6L V8 · AWD
What this code means
The Ignition Diagnostic Monitor (IDM) input circuit to the PCM has a malfunction. The PCM is not receiving the ignition confirmation signal from the ignition module.
Symptoms
- Check Engine Light
- Engine may not start
- Engine stalls
- Rough running
- Misfires
Common causes
- Faulty ignition module
- Damaged wiring between ignition module and PCM
- Failed coil pack
- Corroded connector
Diagnostic steps
- Test ignition module output signal
- Inspect wiring from ignition module to PCM
- Check IDM circuit for continuity
- Test ignition coil primary and secondary resistance
Repair notes
Replace ignition module if no IDM signal. Repair wiring.
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