Severity: Fix right away. Driving risks expensive damage or a breakdown.
The crankshaft position sensor is working, but its signal does not match what the computer expects, which can cause rough running and hard starts.
Check the sensor mounting and wiring, inspect the reluctor ring, and replace the sensor if the signal stays erratic.
The engine may stall or fail to start. Get it checked right away.
Avoid driving until it is checked — towing is the safer choice. The engine may stall or fail to start. Get it checked right away.
The most common causes are: Failing crankshaft position sensor; Damaged reluctor ring; Wiring interference; Loose sensor mounting. A scan tool and a visual check of the parts above is where a technician starts.
Check the sensor mounting and wiring, inspect the reluctor ring, and replace the sensor if the signal stays erratic.
