Severity: Fix right away. Driving risks expensive damage or a breakdown.
The computer is getting no usable signal from the sensor that tracks the crankshaft's position and speed, which it needs to time spark and fuel. Without it, the engine may not start.
Inspect the wiring and connector, clean the sensor tip, and replace the sensor if it gives no signal.
The engine may stall without warning or refuse to start. Do not rely on the car until this is fixed.
Avoid driving until it is checked — towing is the safer choice. The engine may stall without warning or refuse to start. Do not rely on the car until this is fixed.
The most common causes are: Failed crankshaft position sensor; Damaged wiring or connector; Damaged reluctor ring on the crankshaft; Debris on the sensor tip. A scan tool and a visual check of the parts above is where a technician starts.
Inspect the wiring and connector, clean the sensor tip, and replace the sensor if it gives no signal.
