The crankshaft position (CKP) sensor is a magnetic transducer mounted on the engine block adjacent to a pulse wheel located on the crankshaft. By monitoring the crankshaft mounted pulse wheel, the CKP is the primary sensor for ignition information to the Powertrain Control Module (PCM).
Removal & Installation
4.6L, 5.4L & 6.8L Engines
- Disconnect the negative battery cable.
- Raise and safely support the vehicle.
- Remove the splash shield.
- Remove the accessory drive belt from the A/C compressor pulley.
- Disconnect and detach the Crankshaft Position (CKP) sensor electrical connector and move the wiring harness aside.
- Detach the wiring harness from the bracket.
Disconnect the A/C compressor field coil electrical connector.
NOTEIt is not necessary to remove the A/C compressor bolts.
- Loosen the bolts enough to slide the A/C compressor down one inch, allowing access for CKP sensor removal.
- Remove the CKP sensor bolt and the crankshaft sensor.
- Installation is the reverse order of removal. Tighten the sensor bolt to 89 inch lbs. (10 Nm).
- Ensure the ignition switch is in the OFF position.
Remove the bolt and move the ground cable aside.
- Disconnect the Crankshaft Position (CKP) sensor electrical connector.
- Remove the mounting bolt and CKP sensor.
- Installation is the reverse order of removal. Apply clean engine oil to the O-ring before installing.
Inspect the air cleaner and inlet duct. Check all engine vacuum hoses for damage, leaks, cracks, kinks and proper routing. Check Electronic Control (EC) system wiring harness for proper connections, bent or broken pins, corrosion, loose wires and proper routing. Check the powertrain control module (PCM), sensors, and actuators for physical damage.
Basic circuit checks help to minimize pinpoint test steps by providing a procedure to diagnose harness faults associated with the Electronic Engine Control (EC) System: