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P0300 Cadillac

P0300 Cadillac - Cylinder Misfire Detected Random Cylinders

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P0300 Cadillac Comments |  Add Comment
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
Help with Possible causes What does this mean?
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 Cadillac models:

2000-2008 Cadillac Escalade
2000-2008 Cadillac Escalade EXT
2003-2008 Cadillac Escalade ESV
2000-2008 Cadillac Factory Service Bulletin OBDII Code P0300
Help with Tech Notes What does this mean?
When is the code detected?
The control module monitors the crankshaft speed and has detected a misfire condition
Possible symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
- Lack/loss of power
- Hard start
- Engine hesitation
P0300 Cadillac 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.

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CADILLAC Technical Service Bulletins for P0300 code
2010 CADILLAC CTS Engine And Engine Cooling:engine Details
2010 CADILLAC CTS Electrical System Details
2010 CADILLAC SRX Engine And Engine Cooling:engine Details
2010 CADILLAC SRX Electrical System Details
2010 CADILLAC CTS 061000 Engine And Engine Cooling:engine Details
More Bulletins Help with Technical Service Bulletins What does this mean?
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