P0301

Tests 1 - 3:

Tests 4 - 10:

Tests 11 - 14:

Test 15:

SYMPTOM
P0301 - CYLINDER # 1 MISFIRE

TEST NOTE
This symptom is diagnosed using the test P0300 - MULTIPLE CYLINDER MISFIRE.

WHEN MONITORED
With the engine running, after successfully performing a 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 misfire
- 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
- Misfire does not reoccur