How to Replace the Crankshaft Sensor in the 1996 Cavalier LS 2.4 Liter Engine

The 1996 Cavalier, equipped with the 2.4-liter engine, uses a distributor-less ignition system that features a crankshaft position sensor. The onboard computer uses the signal from the crankshaft position sensor to calculate engine speed and position of the crankshaft in its rotation. With this information, the onboard computer can accurately control ignition timing and fuel injector operation. The average home mechanic will need about an hour and basic hand tools, to replace this sensor when it fails.

Instructions

1

Apply the parking brake securely and wedge wheel chocks against the front and back of the rear tires. Raise and support the front of the Cavalier using a floor jack and jack stands positioned under the front subframe.

2

Position the drain pan under the oil filter. Remove the oil filter using an oil filter wrench to gain added access to the crankshaft position sensor located above it. Allow the engine oil to drain into the pan.

3

Unplug the crankshaft position sensor electrical connector. Remove the 10-mm sensor-retaining bolt using a socket and ratchet. Twist the sensor back and forth a few times to loosen it and slide the sensor out of the engine.

4

Lubricate the seal on the new sensor and slide it into position in the engine. Reinstall the retaining bolt and plug the sensor electrical connector into the new sensor. Lubricate the new oil filter's O-ring seal with clean oil and install the new oil filter. Tighten the filter hand tight.

5

Remove the jack stands and lower the front of the Cavalier to the ground. Check the engine oil level and top it off as necessary to replace the oil that was lost during the repair. Start the engine and check for oil leaks.