Possible Causes
- Electrical Cause
- Yes
- Mechanical Cause
- Yes
- Monitor Description
- Inferred mixture strength below threshold, (richer mixture)
- Prioritized List of Possible Causes
- Blockage or restriction of air entering cylinder
- Restriction of fuel rail
- Blockage or restriction within exhaust manifold
- Fuel injector
- Friction in valve train components
- Continuously variable valve lift system failures