Possible Causes
WARNING: This page is about a different car, the 2002 Nissan Pathfinder and 2002 Infiniti QX4. However, it is still accessible from the selected car via links, so may be relevant.
ECM illuminates MIL and sets appropriate DTC P0300-P0306 when one cylinder misfires or multiple cylinders misfire. Possible causes are:
- Wrong spark plugs.
- Insufficient compression.
- Incorrect fuel pressure.
- Injector circuit is open or shorted.
- Defective fuel injectors.
- Intake air leak.
- Ignition secondary circuit is open or shorted.
- Lack of fuel.
- Defective drive plate or flywheel.
- Defective HO2S 1.
- Incorrect PCV hose connection.