Altima L4-2.5L (QR25DE) Hybrid (2007)
DIAGNOSTIC FLOW CHART
Diagnostic Inspection
DIAGNOSTIC INSPECTION
Refer to section EC in the Service Manual under "P0300, P0301, P0302, P0303, P0304 MISFIRE" for details on the following inspection items.
1. Check operation of ignition coils and spark plugs.
2. Check fuel pressure.
3. Check fuel quality and condition make sure diesel fuel has not been introduced into the fuel tank.
4. Check intake air leaks and PCV hose connections.
5. Check function of fuel injectors - listen to each fuel injector operating sound.
6. Check MASS AIR FLOW SENSOR.
7. Check A/F SENSOR.