Possible Causes
- Electrical Cause
- Mechanical Cause
- Monitor Description
- The powertrain control module has detected that the actual ignition timing is different to that requested for optimal catalyst heating
- Prioritized List of Possible Causes
- Intake system leak
- Positive crankcase ventilation system leak
- Engine crankcase breather system components incorrectly installed
- Engine vacuum system leak
- Brake booster leak
- Intake system restricted
- Accessory drive belt overloaded or failed
- Accessory drive belt tensioner or pulley seized