P0335 — Crankshaft Position Sensor (CKP) circuit fault — signal missing or unstable. Engine may not start at all, may stall while driving, or run with dropouts

What it means

Common causes

• The CKP sensor itself — inductive or Hall-effect, wears out or cracks
• Damaged wiring — often chafed near a bracket
• Corroded or oiled CKP connector
• Damaged reluctor teeth on flywheel or crank pulley — after starter/flywheel work
• Metal shavings stuck to sensor face (magnetized) — typical after clutch wear
• Wiring open or shorted to ground/power — verify with multimeter and scope
• Failed ECM — rare but possible after water intrusion

How to diagnose

1. 01

   Read all stored and pending codes with an OBD-II adapter — get the full picture, not just the one code.

2. 02

   Capture freeze-frame data (RPM, coolant temperature, engine load) at the exact moment the code triggered.

3. 03

   Inspect the named subsystem with our app's AI explanation — get vehicle-specific causes for your make, model and year.

Related codes

• P0016 Correlation between crankshaft and intake camshaft on Bank 1 is out of spec. ECM sees the two sensors reporting mismatched positions — timing is physically off
• P0017 Correlation between crankshaft and exhaust camshaft on Bank 1 is out of spec. The two sensors disagree beyond the accepted window
• P0336 CKP sensor signal is out of expected range. Engine occasionally stalls or is hard to start when hot
• P0340 Camshaft Position Sensor (CMP) circuit fault. Engine doesn't know when to inject fuel to specific cylinders — falls back to synchronous injection, fuel economy worsens
• P0341 CMP signal doesn't match expected range. Engine sees camshaft phasing drifting
• P0328 Knock Sensor 1 Circuit High