P0300 - Cylinder Misfire Detected Random Cylinders

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3  What does this mean?
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
  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"
  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 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.

P0300 Information for specific makes
P0300 ACURA Random Cylinder Misfire Detected
P0300 AUDI Random Cylinder Misfire Detected
P0300 BMW Combustion Misfires Several Cylinders
P0300 BUICK Cylinder Misfire Detected Random Cylinders   
P0300 CADILLAC Cylinder Misfire Detected Random Cylinders   
P0300 CHEVROLET Cylinder Misfire Detected Random Cylinders   
P0300 CHRYSLER Cylinder Misfire Fault Detected Random Cylinders
P0300 DODGE Cylinder Misfire Fault Detected Random Cylinders
P0300 FORD Random Misfire Detected   
P0300 GMC Cylinder Misfire Detected Random Cylinders   
P0300 HONDA Random Cylinder Misfire Detected
P0300 HUMMER Cylinder Misfire Detected Random Cylinders   
P0300 HYUNDAI Random/Multiple Cylinder Misfire Detected
P0300 INFINITI Cylinder Misfire Detected Random Cylinders
P0300 JEEP Cylinder Misfire Fault Detected Random Cylinders
P0300 KIA Random/Multiple Cylinder Misfire Detected
P0300 LEXUS Random Cylinder Misfire Condition
P0300 MAZDA Random Cylinder Misfire Detected
P0300 MERCEDES-BENZ Cylinder Misfire Detected Random Cylinders
P0300 MERCURY Random Misfire Detected
P0300 MINI Combustion Misfires Several Cylinders
P0300 MITSUBISHI Cylinder Misfire Detected Random Cylinders
P0300 NISSAN Cylinder Misfire Detected Random Cylinders
P0300 OLDSMOBILE Cylinder Misfire Detected Random Cylinders   
P0300 PONTIAC Cylinder Misfire Detected Random Cylinders
P0300 SATURN Cylinder Misfire Detected Random Cylinders
P0300 SCION Random Cylinder Misfire Condition
P0300 SUBARU Random Cylinder Misfire Detected
P0300 TOYOTA Random Cylinder Misfire Condition
P0300 VOLKSWAGEN Random Cylinder Misfire Detected
Related Information
Repair Importance Level: 3
 
1=Low 2=Medium 3=High  
Repair Difficulty Level: 3
 
1=Easy 2=Moderate 3=Hard  
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