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
The DTC P1346 Intake Camshaft Position (CMP) System Performance monitors the operation of the Camshaft Position (CMP) actuator system. CMP actuator system enables Powertrain Control Module (PCM) to change intake camshaft timing while the engine is running. CMP actuator solenoid controls the advance or retard of the camshaft. CMP actuator solenoid is controlled by a Pulse Width Modulated (PWM) signal from the PCM. CMP sensor monitors camshaft position or camshaft angle, and compares that position or phase to Crankshaft Position (CKP) sensor signal. PCM determines whether the camshaft angle is correct by comparing actual camshaft position to target camshaft position. By continuously analyzing input of CMP and CKP sensors, PCM can detect a failure in the CMP actuator system.
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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.