P0307

Tests 1 - 5:

Tests 6 - 9:

SYMPTOM
P0307-CYLINDER # 7 MISFIRE

TEST NOTE
This symptom is diagnosed using the test note P0300-MULTIPLE CYLINDER MIS-FIRE.

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

SET CONDITION
When more than a 2% (1.5% LEV) misfire rate is measured during two trips (one trip California), or with a 10% to 30% misfire rate during one trip.

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