Possible Causes
- Open or short in engine wire.
- Improper connector connection.
- Improper vacuum hose connection.
- Defective Positive Crankcase Ventilation (PCV) hose.
- Defective ignition system.
- Defective injector.
- Improper fuel pressure.
- Defective mass air flow meter.
- Defective engine coolant temperature sensor.
- Improper compression pressure.
- Improper valve clearance.
- Improper valve timing.
- Defective Variable Valve Timing and Lift (VVTL) system (Matrix 2ZZ-GE engine only).
- Defective ECM.