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

1. Test ignition module output signal
2. Inspect wiring from ignition module to PCM
3. Check IDM circuit for continuity
4. Test ignition coil primary and secondary resistance

Repair notes

Replace ignition module if no IDM signal. Repair wiring.

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