Can a crankshaft sensor cause the engine to stumble or hesitate?

Yes, a faulty crankshaft position sensor (CKP sensor) can absolutely cause an engine to stumble or hesitate. The CKP sensor is crucial because it tells the Engine Control Unit (ECU) where the crankshaft is in its rotation. This information is vital for precise fuel injection and ignition timing.

If the CKP sensor is malfunctioning, the ECU might receive inaccurate or intermittent signals. This leads to:

* Incorrect fuel delivery: The engine may receive too much or too little fuel at the wrong time.

* Poor ignition timing: Spark plugs might fire at the wrong moment, resulting in misfires.

* Rough idle: The engine might idle poorly or stall.

* Hesitation under acceleration: The engine might stumble or hesitate when you accelerate.

* Lack of power: Overall engine performance may be reduced.

* Check engine light: A malfunctioning CKP sensor will almost certainly trigger a check engine light.

Therefore, a stumbling or hesitating engine is a strong indication that the CKP sensor could be a potential culprit, although other issues can cause similar symptoms. A proper diagnosis from a mechanic is necessary to pinpoint the exact cause.