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.
Circuit Description
Camshaft Position (CMP) sensor is mounted on top of engine block at rear of valley cover. CMP works in conjunction with CMP reluctor (1X). Reluctor is located on inside engine, immediately in front of rear cam bearing. CMP sensor is used to determine whether a cylinder is on a firing or exhaust stroke. As camshaft rotates, reluctor wheel interrupts a magnetic field produced by magnet inside sensor. Sensor produces signal sent to PCM. PCM uses 1X signal along with CKP sensor 24X signal to determine crankshaft position and stroke. A slightly longer cranking time may be a symptom of this DTC. Conditions for setting DTC:
- Ignition voltage is 5-17 volts.
- Engine speed is less than 4000 RPM.
- PCM detects CMP-to-CKP mismatch has occurred for 10 seconds.
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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.