Circuit/System Testing
WARNING: This page is about a different car, the 2009 GMC Sierra, 2009 GMC Cab & Chassis Sierra, 2009 Chevrolet Silverado, and 2009 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
- Ensure that the CMP sensor circuits are not routed too closely to the fuel injector wiring, after-market add-on electrical equipment, solenoids, relays, or motors.
- Inspect the CMP sensor for physical damage, loose or improper installation, foreign material passing between the sensor and the reluctor wheel, timing gear misalignment, or front engine cover damage.
- Inspect the CMP reluctor wheel for physical damage, improper installation, or excessive endplay or looseness.
- If no other condition is found, replace the CMP sensor.