No CMP or SGC Signal
2002-2003 Mazda Protege5 2.0L I4
Description
The PCM is not receiving a Camshaft Position sensor or Signal Generator C signal. Without this signal, the PCM cannot determine camshaft position for sequential fuel injection and ignition timing, resulting in a no-start or severe running condition.
Symptoms
- Engine cranks but will not start
- Engine runs very rough if it starts
- Check Engine Light
- Backfiring
Common Causes
- Faulty CMP sensor
- Damaged CMP sensor wiring
- CMP sensor connector disconnected
- Damaged reluctor ring
- Timing belt or chain failure affecting cam signal
Diagnostic Steps
- Check for CMP sensor signal on scan tool during cranking
- Inspect CMP sensor connector and wiring
- Test CMP sensor resistance
- Check CMP sensor air gap
- Verify timing belt or chain condition
Repair Notes
Replace the CMP sensor if it is not producing a signal; check timing belt or chain condition.
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
P1345 on Other Vehicles
Common Questions
What does code P1345 mean on a 2002-2003 Mazda Protege5?
P1345 stands for "No CMP or SGC Signal". The PCM is not receiving a Camshaft Position sensor or Signal Generator C signal. Without this signal, the PCM cannot determine camshaft position for sequential fuel injection and ignition timing, resulting in a no-start or severe running condition.
What are the symptoms of P1345 on a Mazda Protege5?
Common symptoms of P1345 include: Engine cranks but will not start, Engine runs very rough if it starts, Check Engine Light, Backfiring.
What causes P1345 on a 2002-2003 Mazda Protege5?
Common causes of P1345 include: Faulty CMP sensor, Damaged CMP sensor wiring, CMP sensor connector disconnected, Damaged reluctor ring, Timing belt or chain failure affecting cam signal.