Ignition Diagnostic Monitor Signal Lost
2014-2021 Mazda Mazda6 2.5L I4
Description
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.
Related Codes
Other Powertrain Codes
- P0001Fuel Volume Regulator Control Circuit/Open
- P0002Fuel Volume Regulator Control Circuit Range/Performance
- P0003Fuel Volume Regulator Control Circuit Low
- P0004Fuel Volume Regulator Control Circuit High
- P0010Intake Camshaft Position Actuator Circuit/Open Bank 1
- P0011Intake Camshaft Position Timing Over-Advanced Bank 1
- P0012Intake Camshaft Position Timing Over-Retarded Bank 1
- P0013Exhaust Camshaft Position Actuator Circuit/Open Bank 1
- P0014Exhaust Camshaft Position Timing Over-Advanced Bank 1
- P0015Exhaust Camshaft Position Timing Over-Retarded Bank 1
P1351 on Other Vehicles
Common Questions
What does code P1351 mean on a 2014-2021 Mazda Mazda6?
P1351 stands for "Ignition Diagnostic Monitor Signal Lost". 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.
What are the symptoms of P1351 on a Mazda Mazda6?
Common symptoms of P1351 include: Check Engine Light, Engine may not start, Engine stalls, Rough running, Misfires on multiple cylinders.
What causes P1351 on a 2014-2021 Mazda Mazda6?
Common causes of P1351 include: Faulty ignition module, Damaged wiring between ignition system and PCM, Failed ignition coil pack, Corroded ignition system connector, PCM IGF input circuit fault.