The crank and cam signals on bank 1 are out of step. The driver may notice a hard start, rattle at start-up, rough running or weak power.
Causes vary by car. Test before you order a part.
Likely causes, most common first
- Stretched timing chain or worn guides
- Timing belt or chain out of position
- Faulty cam phaser or VVT solenoid
- Faulty crank or cam sensor
Parts usually involved
- Timing chain or belt Find at suppliers
- Cam phaser Find at suppliers
- VVT solenoid Find at suppliers
- Camshaft position sensor Find at suppliers
Test before you replace
Verify mechanical timing and oil condition, and compare crank and cam signals before replacing sensors.
General guidance for generic OBD2 codes. Always follow the maker's procedure for the car in front of you.