P0300

Tests 1 - 4:

Tests 5 - 7:

Tests 8 - 11:

Test 12:

SYMPTOM
P0300-MULTIPLE CYLINDER MISFIRE

WHEN MONITORED
Any time the engine is running, and the adaptive numerator has been successfully updated.

SET CONDITION
When more than a 2% (2.5% LEV) misfire rate is measured during two trips. Above 3000 RPM 1 trip less than 3000 RPM 2 trip.

POSSIBLE CAUSES
- Misfire conditions no longer exist
- Fuel system problem
- Secondary ignition or mechanical problem
- Erratic CAM/crank sensor signals
- Engine mechanical problem
- Other possible causes for misfire