P0303

Tests 1 - 2:

Tests 3 - 6:

Tests 7 - 8:

SYMPTOM
P0303-CYLINDER # 3 MISFIRE

TEST NOTE
This symptom is diagnosed using the test 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 1% misfire rate is measured during two trips, or with a 6% to 30% misfire rate during one trip.

POSSIBLE CAUSES
- Intermittent misfire
- Secondary ignition
- Engine mechanical problem
- Fuel system problem
- Erratic CAM/CRANK sensor signals
- Other possible causes for misfire
- PCM