P1336high severityPowertrain
Crankshaft/Camshaft Sensor Range/Performance
on 2018 Ford Flex 3.5L V6 EcoBoost · AWD
What this code means
The PCM has detected a synchronization or erratic signal from the crankshaft position (CKP) or camshaft position (CMP) sensors. The signals do not correlate properly, indicating potential timing issues.
Symptoms
- Check Engine Light
- Engine misfires
- Rough idle
- Poor acceleration
- Stalling
- Difficulty starting
Common causes
- Faulty crankshaft position sensor
- Faulty camshaft position sensor
- Damaged reluctor/tone ring
- Timing chain stretched or jumped (common on 4.0L SOHC)
- Faulty starter motor affecting signal
- Wiring damage
Diagnostic steps
- Test CKP and CMP sensor signals on oscilloscope
- Inspect sensor gap and reluctor ring
- Check timing chain condition — especially on 4.0L SOHC
- Inspect sensor wiring and connectors
- Verify battery and starter motor condition
Repair notes
Replace faulty sensor. On 4.0L SOHC, inspect timing chain guides — a broken chain guide is a known failure.
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