Code result
P0339
Crankshaft Position Sensor A Circuit Intermittent
High severity
What it means
The crankshaft position sensor A signal jumps or drops out intermittently — connector, sensor air gap, or damaged tone wheel. The PCM may detect a "false" stall or misfire spike when the signal drops.
Is it safe to drive?
No — stop driving
This code points to a problem that can cause damage or affect safety. Avoid driving and have the vehicle diagnosed promptly.
Most likely causes
Intermittent connector
highOne of the most commonly reported causes for this code — check this first.
Tone wheel chipped or contaminated
mediumA plausible cause — test and verify before replacing parts.
Connector with intermittent contact under vibration
lowLess common, but worth ruling out after the more likely causes.
Related help
Get the full diagnosis
Add your vehicle and see step-by-step repair help, recalls, and TSBs in Wrenchify.
Diagnose P0339 freeNo credit card required