P0300 Multiple Cylinder Misfire

SYMPTOM LIST
P-0300 MULTIPLE CYLINDER MIS-FIRE

TEST NOTE:
All symptoms listed above are diagnosed using the same tests. The title for the tests will be P-0300 MULTIPLE CYLINDER MIS-FIRE.

WHEN MONITORED
With the engine running, after successfully performing Crank Sensor learn.

SET CONDITION
When more than a 2% misfire rate is measured during two trips, or with a 10% to 30% misfire rate during one trip.

POSSIBLE CAUSES
- Other possible causes for mis-fire
- Cam, crank, valve timing, or vacuum problem
- Electronic ignition coil output low
- Engine mechanical problem
- Secondary ignition pattern irregular
- Fuel contamination
- Fuel pressure leak down out of specification
- Fuel pump amperage out of specification
- Fuel pump capacity out of specification
- Fuel pump pressure out of specification
- Mis-fire does not reoccur