P0301

Test 1 - 2:

Test 3 - 5:

Test 6 - 8:

Test 9 - 12:

Test 13 - 16:

SYMPTOM
P0301-CYLINDER # 1 MISFIRE

TEST NOTE
This symptom is diagnosed using the 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
- Visual Inspection
- 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