Possible Causes
- The engine control module has determined failures where some circuit quantity, reported via serial data, is below a specified range
- Intake air system blockage, restricting air from entering cylinders
- Specified cylinder, localized damage/restriction of fuel rail
- Specified cylinder, localized blockage/restriction within exhaust manifold
- Fuel injector failure
- Damage/friction in valve train components
- Camshaft profile switching system failure