Code result
P034B
Crankshaft Position Sensor - Crankshaft Direction Incorrect
High severity
What it means
The crankshaft is rotating in the wrong direction relative to the expected reference — typically only seen on stop-start systems where the engine briefly counter-rotates after shutdown.
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
Stop-start residual reverse rotation
highOne of the most commonly reported causes for this code — check this first.
Related help
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