P0335 Ford F-150
Crankshaft Position Sensor A Circuit Malfunction · Powertrain Code · Critical · Repair: Moderate
What is P0335?
The crankshaft position sensor circuit has a malfunction. Engine may crank but not start, or stall intermittently.
When the Ford F-150 triggers code P0335 (crankshaft position sensor a circuit malfunction), it typically points to an issue in the powertrain system. This is a critical severity code, so address it promptly to avoid further damage or safety concerns. Below you'll find the most common causes, symptoms, and repair options specific to the Ford F-150.
This repair is rated moderate, meaning some experience and specialty tools required.
Diagnostic data on this page is compiled from publicly available repair resources and technical service bulletins. Always have a qualified mechanic confirm the diagnosis before authorizing repairs on your Ford F-150.
Common Causes on Ford F-150
- Failed crankshaft position (CKP) sensor
- Damaged reluctor ring (tone wheel) on the crankshaft
- CKP sensor wiring shorted or open from heat damage near exhaust
- Excessive crankshaft endplay or bearing wear
Symptoms
- Check engine light
- Engine cranks but will not start (no spark/fuel)
- Intermittent stalling while driving
- Rough running or random misfires
- Tachometer drops to zero intermittently
Notes for Ford F-150
If the engine cranks but will not start and there are no other codes, the CKP sensor is the prime suspect — carry a spare on long trips if yours is high mileage.