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 (CMP) Sensor
The CMP sensor is a Hall effect sensor that detects the position of the camshaft. The CMP sensor identifies when piston number 1 is on its compression stroke. The PCM calculates the CMP signal and the crankshaft position (CKP) sensor signal to determine the camshaft to crankshaft position for correct fuel injection timing during the compression stroke. The CMP sensor is located on the left side rear of the cylinder head (Transit). The CMP sensor is mounted at the front of the engine block, above the crankshaft pulley (All others).
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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.