Possible Causes
WARNING: This page is about a different car, the 2003 Nissan Pathfinder. 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.