P1391high severityPowertrain
Intermittent Loss Of CKP Or CMP Sensor Signal
on 2014 Jeep Wrangler 3.6L V6 · 4WD
What this code means
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.
Other Powertrain codes on this vehicle
P0001
Fuel Volume Regulator Control Circuit/Open
P0002
Fuel Volume Regulator Control Circuit Range/Performance
P0003
Fuel Volume Regulator Control Circuit Low
P0004
Fuel Volume Regulator Control Circuit High
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