P0338: Crankshaft Position Sensor A Circuit High
Do not keep driving
Expect stalling or a no-start. Have it diagnosed rather than driven.
What this code means
The crankshaft sensor signal is above its valid range — a short to supply, or an open ground. An open signal return will float the input high and produce this code with a perfectly healthy sensor, so check the ground path before ordering a part.
Likely causes
Start here
- Wiring shorted to voltage · moderate
- Open sensor ground circuit · moderate
- Faulty crankshaft position sensor · moderate
Less common
- Corroded or loose connector · easy
Symptoms
Components involved
Information, not instruction
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Have anything you intend to act on checked by a trained person against the manufacturer's own procedure for your vehicle. Nothing here replaces that procedure.
Community experience
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