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Infiniti >
Engine Codes > P0300
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Most Infiniti Models |
DTC: P0301-P0308
Trouble diagnosis name:
P0301 No.1 cylinder misfire detected >> Search Bulletins/Recalls for P0301
P0302 No.2 cylinder misfire detected >> Search Bulletins/Recalls for P0302
P0303 No.3 cylinder misfire detected >> Search Bulletins/Recalls for P0303
P0304 No.4 cylinder misfire detected >> Search Bulletins/Recalls for P0304
P0305 No.5 cylinder misfire detected >> Search Bulletins/Recalls for P0305
P0306 No.6 cylinder misfire detected >> Search Bulletins/Recalls for P0306
P0307 No.7 cylinder misfire detected >> Search Bulletins/Recalls for P0307
P0308 No.8 cylinder misfire detected >> Search Bulletins/Recalls for P0308
Diagnosis Logic
When a misfire occurs in one of the cylinders, engine speed will fluctuate. If the engine speed fluctuates enough to cause the crankshaft
position (CKP) sensor (POS) signal to vary, ECM can determine that a misfire is occurring.
DTC detecting condition:
- Multiple cylinder misfire.
Possible cause:
- Improper spark plug
- Insufficient compression
- Incorrect fuel pressure
- The injector circuit is open or shorted
- Fuel injectors may be faulty
- Intake air leak
- The ignition signal circuit is open or shorted
- Lack of fuel
- Drive plate or flywheel
- Front heated oxygen sensor may be faulty
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