P1351high severityPowertrain
Ignition Diagnostic Monitor Signal Lost
on 1997 Mazda 626 2.5L V6 · FWD
What this code means
The PCM has lost the ignition diagnostic monitor signal. The ignition system is not providing a confirmation signal back to the PCM that the ignition events are occurring as commanded.
Symptoms
- Check Engine Light
- Engine may not start
- Engine stalls
- Rough running
- Misfires on multiple cylinders
Common causes
- Faulty ignition module
- Damaged wiring between ignition system and PCM
- Failed ignition coil pack
- Corroded ignition system connector
- PCM IGF input circuit fault
Diagnostic steps
- Test ignition module output signal
- Inspect wiring from ignition system to PCM
- Check ignition coil primary and secondary resistance
- Test for spark at each cylinder
- Verify PCM receives IGF signal
Repair notes
Replace the ignition module or coil pack if the diagnostic monitor signal is absent.
Other Powertrain codes on this vehicle
P0001
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P0002
Fuel Volume Regulator Control Circuit Range/Performance
P0003
Fuel Volume Regulator Control Circuit Low
P0004
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P0010
Intake Camshaft Position Actuator Circuit/Open Bank 1
P0011
Intake Camshaft Position Timing Over-Advanced Bank 1
P0012
Intake Camshaft Position Timing Over-Retarded Bank 1
P0013
Exhaust Camshaft Position Actuator Circuit/Open Bank 1
P0014
Exhaust Camshaft Position Timing Over-Advanced Bank 1
P0015
Exhaust Camshaft Position Timing Over-Retarded Bank 1