The cam signal is irregular or out of step with the crank signal. The driver may notice a hard start, weak power or misfires.
Likely causes, most common first
- Stretched timing chain or incorrect timing
- Faulty camshaft sensor
- Damaged reluctor on the camshaft
- Poor wiring contact
Parts usually involved
- Camshaft position sensor
- Timing chain or belt
- Sensor connector
Test before you replace
Compare crank and cam signals on an oscilloscope and verify mechanical timing.
General guidance for generic OBD2 codes. Always follow the maker's procedure for the car in front of you.