P0300

Test 1 - Test 3:

Test 4 - Test 6:

Test 7 - Test 9:

Test 10 - Test 12:

Test 13 - Test 16:

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
- Intermittent misfire
- Visual inspection
- (F142), (K334) ASD relay output circuit
- Engine mechanical problem
- Ignition coil
- Coil control circuit
- Spark plug
- Checking fuel pressure
- Fuel pump inlet strainer plugged
- Restricted fuel supply line
- Fuel pump module
- Checking fuel leak down
- Fuel injector
- Injector control circuit
- PCM