P0337: Crankshaft Position Sensor A Circuit Low
Do not keep driving
Expect stalling or a no-start. Not a code to drive on.
What this code means
The crankshaft sensor signal is below its valid range — a short to ground, or a sensor no longer generating output. Where the sensor is an inductive type it generates its own voltage, so a low reading can mean a collapsed winding; where it is a Hall-effect type it needs a supply, and a lost supply reads the same way. Establishing which type is fitted changes the test entirely.
Likely causes
Start here
- Faulty crankshaft position sensor · moderate
- Wiring shorted to ground · moderate
- Failed sensor reference voltage supply · moderate
Less common
- Corroded or loose connector · easy
- Damaged sensor cable shielding · moderate
Symptoms
Components involved
Information, not instruction
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Community experience
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