1997 Pontiac Sunfire crankshaft censer

Fig. 1: View of the Crankshaft Position Sensor (CKP) location-2.2L engines

Unfasten the Crankshaft Position (CKP) sensor retaining bolt-2.2L engine shown
After the Crankshaft Position (CKP) sensor retaining bolt has been removed, grasp the sensor and pull it from its bore in the engine block using a slight twisting motion-2.2L engine shown

Fig. 2: The Crankshaft Position (CKP) sensor location-2.3L/2.4L engines

Disconnect the negative battery cable.
Raise the vehicle and support it with jackstands.
Unplug the sensor harness connector at the sensor.
Unfasten the retaining bolt, then remove the sensor from below the coil pack on 2.2L engines, and above the oil filter on the 2.3L/2.4L engines. Inspect the sensor O-ring for wear, cracks or leakage and replace if necessary.

To install:
Lubricate the O-ring with clean engine oil, then place it on the sensor.
Install the sensor and tighten the retaining bolt to 71 inch lbs. On the 2.2L engine and 88 inch lbs. (10 Nm) on the 2.3L/2.4L engine.
Attach the sensor harness connector.
If removed, install the steering linkage shield.
Lower the vehicle.
Connect the negative battery cable.