Home Auto Repair How to Replace the Crank Sensor on a 1995 Buick LeSabre

How to Replace the Crank Sensor on a 1995 Buick LeSabre


The crankshaft position sensor (CKP) in your 1995 Buick LeSabre measures crankshaft position, rotation and engine speed. The computer uses information from this and other sensors to control ignition timing. So, a bad crankshaft sensor can prevent your vehicle engine from starting. The sensor seats behind the harmonic balancer puller and fits into a bracket hole. Since you do not have to adjust the sensor, you can replace it by removing a few components using common tools and a torque wrench.

Tools Used: Tools, Wrench, 24-inch box-end wrench, Lug wrench, Floor jack, Jack stand, Door panel remover tool, Ratchet, Socket set, Breaker bar, 28 mm socket, 3-jaw puller, Ratchet extension, Torque wrench

Replace Crank Sensor

Removing the Crankshaft Position Sensor

Remove the negative (black) battery cable with a wrench. Note the serpentine belt routing so that you can reinstall it during the reassembly process. Rotate the belt tensioner pulley away from the belt and hold the belt in that position. Use a 24-inch, or larger box-end wrench. The tensioner pulley is located to the left of the alternator. As you hold the pulley away from the belt, slip the belt off the alternator pulley. Slowly release the tensioner and slip the belt off the crankshaft pulley. Leave the belt installed on the rest of the accessory pulleys.

Loosen the lug nuts on the front, passenger-side wheel assembly with a lug wrench. Lift the front, passenger-side wheel assembly off the ground with a floor jack and support the vehicle on a jack stand. Remove the wheel assembly and the wheel well splash shield. Use a door panel remover tool and ratchet and socket, as needed, for the splash shield.