Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Camshaft Position Sensor (4.2L)
The Camshaft Position (CMP) sensor utilizes a Hall Effect sensor that serves a similar function as Crankshaft Position (CKP) sensor. CMP sensor is mounted on engine block in close proximity to camshaft. CMP sensor creates a 6X plus a sync signal for each revolution of the camshaft. These signals are for control of sequential fuel injection and for exhaust camshaft phaser control. CMP sensor is connected directly to PCM and consists of 12-volt reference circuit, low reference circuit and CMP sensor signal circuit.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.