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P0300 OLDSMOBILE

P0300 OLDSMOBILE - Cylinder Misfire Detected Random Cylinders

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Possible causes
- Faulty spark plug (s)
- Faulty ignition coil (s)
- Clogged or faulty fuel injector (s)
- Intake air leak
- Fuel injectors harness is open or shorted
- Fuel Injectors circuit poor electrical connection
- Ignition coils harness is open or shorted
- Ignition coils circuit poor electrical connection
- Insufficient cylinders compression
- Incorrect fuel pressure
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Tech notes
The P0300 code means that a cylinder(s) is misfiring or is randomly misfiring. Start by checking for intake leaks, intake gaskets are common caused of multi-cylinder misfiring. If no leak are found the next step is to replace the spark plugs. If the problem persist more tests needs to be done to diagnose problem, see "Possible Causes".

There is a factory service bulletin for the following Oldsmobile models:

2000-2004 Oldsmobile Alero
2000-2005 Oldsmobile Silhouette
2002-2004 Oldsmobile Bravada
2000-2004 Oldsmobile Factory Service Bulletin OBDII Code P0300
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When is the code detected?
The control module monitors the crankshaft speed and has detected a misfire condition
Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
- Lack/loss of power
- Hard start
- Engine hesitation
P0300 OLDSMOBILE Description
When a misfire occurs, engine speed will fluctuate. If the engine speed fluctuates enough to cause the Crankshaft Position (CKP) sensor signal to vary, the Engine Control Module (ECM) can determine that a misfire is occurring.
OLDSMOBILE Technical Service Bulletins for P0300 code
2002 OLDSMOBILE BRAVADA ENGINE AND ENGINE COOLING:ENGINE Details
2003 OLDSMOBILE BRAVADA ENGINE AND ENGINE COOLING:ENGINE Details
2004 OLDSMOBILE BRAVADA ENGINE AND ENGINE COOLING:ENGINE Details
2002 OLDSMOBILE BRAVADA 061000 ENGINE AND ENGINE COOLING:ENGINE Details
2003 OLDSMOBILE BRAVADA 061000 ENGINE AND ENGINE COOLING:ENGINE Details
2004 OLDSMOBILE BRAVADA 061000 ENGINE AND ENGINE COOLING:ENGINE Details
2001 OLDSMOBILE BRAVADA ENGINE AND ENGINE COOLING:ENGINE Details
2000 OLDSMOBILE ALERO ELECTRICAL SYSTEM:WIRING Details
2000 OLDSMOBILE BRAVADA ELECTRICAL SYSTEM Details
2000 OLDSMOBILE SILHOUETTE ELECTRICAL SYSTEM:WIRING Details
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