Can a Faulty Crankshaft Position Sensor Cause Engine Stalling?
2 Answers
The crankshaft position sensor plays a crucial role in determining the position of the crankshaft, specifically its rotational angle. It typically works in conjunction with the camshaft position sensor to establish the fundamental ignition timing. Crankshaft Sensor: It generally collaborates with the camshaft position sensor to determine the basic ignition timing. There are typically three types of crankshaft sensors: magnetic induction type, Hall effect type, and optical type. The most common magnetic induction crankshaft position sensors are usually categorized as 2-wire or 3-wire. Sensor Inspection: To check the sensor, turn off the ignition switch and disconnect the crankshaft position sensor connector. Measure the resistance between terminal 1 and terminal 2 of the sensor; it should read between 400 to 600 ohms. If the reading falls outside this range, it indicates a fault in the crankshaft position sensor itself, and the sensor should be replaced.
A faulty crankshaft position sensor is no trivial matter—it absolutely puts your car at risk of stalling. This sensor precisely monitors the position and speed of the crankshaft's rotation, and the engine control unit (ECU) relies on it to accurately manage ignition timing and fuel injection. If the sensor fails, the ECU won't receive correct signals, disrupting coordination. The engine may run rough, lose power, or even stall outright—especially dangerous if it happens mid-drive. I’ve also encountered cases where cars struggled to start or failed to crank, all linked to this issue. Worse, a bad sensor can cascade into problems with the camshaft position sensor, triggering a chain reaction of issues—illuminated engine warning lights usually confirm the trouble. At the first sign of trouble, head to a professional repair shop for a diagnostic scan. Don’t gamble by driving; a highway stall is no joke. Replacing the sensor isn’t typically expensive, but proper installation and maintenance are key. Regular checks can prevent surprises.