Intermittent Loss Of CKP Or CMP Sensor Signal
2007-2011 Dodge Nitro 3.7L V6
Description
The PCM has detected an intermittent loss of the crankshaft position sensor or camshaft position sensor signal. The signal drops out momentarily during engine operation, which can cause misfires and stalling.
Symptoms
- Check Engine Light
- Intermittent stalling
- Engine misfires
- Rough idle
- Difficulty starting
Common Causes
- Faulty CKP or CMP sensor
- Damaged sensor wiring or connector
- Corroded sensor connector pins
- Excessive sensor air gap
- Damaged reluctor ring or tone wheel
Diagnostic Steps
- Monitor CKP and CMP sensor signals on scan tool for dropouts
- Wiggle test sensor wiring while engine is running
- Inspect sensor connectors for corrosion or looseness
- Measure sensor air gap
- Inspect reluctor ring for missing or damaged teeth
Repair Notes
Replace the sensor that is dropping signal; inspect wiring and connectors for intermittent contact.
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
P1391 on Other Vehicles
Common Questions
What does code P1391 mean on a 2007-2011 Dodge Nitro?
P1391 stands for "Intermittent Loss Of CKP Or CMP Sensor Signal". The PCM has detected an intermittent loss of the crankshaft position sensor or camshaft position sensor signal. The signal drops out momentarily during engine operation, which can cause misfires and stalling.
What are the symptoms of P1391 on a Dodge Nitro?
Common symptoms of P1391 include: Check Engine Light, Intermittent stalling, Engine misfires, Rough idle, Difficulty starting.
What causes P1391 on a 2007-2011 Dodge Nitro?
Common causes of P1391 include: Faulty CKP or CMP sensor, Damaged sensor wiring or connector, Corroded sensor connector pins, Excessive sensor air gap, Damaged reluctor ring or tone wheel.