P0335: Crankshaft Position Sensor A Circuit Malfunction
Your crankshaft position sensor has failed or the circuit is broken. This sensor tells the engine computer exactly where the crankshaft is at all times, which is critical for ignition timing and fuel injection. Without it, the engine often won't start.
Symptoms
- Engine stalls suddenly
- Hard or no-start condition
- Check engine light
- Engine cranks but won't fire
- Intermittent stalling at speed
Causes (Ranked by Likelihood)
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DIY Fix Steps
⚠ Safety first: work on a cold engine, chock wheels, use jack stands - never rely on a floor jack alone.
CKP sensor is typically near the crankshaft pulley (front of engine) or on the bell housing (transmission side). Check a vehicle-specific repair guide for exact location.
Before replacing sensor, check connector for corrosion or damage. Wiggle harness with engine running - if stalling occurs, it's a wiring issue.
Remove the single bolt holding the sensor. Pull sensor out. Compare old and new sensors - should be identical. Apply a drop of engine oil to O-ring if equipped. Torque bolt to spec (8-12 ft-lbs typically).
Clear DTC. Start engine. Some vehicles require a "relearn" procedure after CKP replacement - check if your vehicle needs a crank relearn.