For Shop Owners

P0300 CHEVROLET - 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 commonly caused of multi-cylinder misfiring. If no leak is found the next step is to replace the spark plugs. If the problem persists more tests needs to be done to diagnose the problem, see "Possible Causes".

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

2000 Chevrolet S-10
2000-2008 Chevrolet Camaro
2000-2008 Chevrolet Lumina
2000-2008 Chevrolet Cavalier
2000-2003 Chevrolet Impala
2000-2003 Chevrolet Malibu
2000-2003 Chevrolet Monte Carlo
2000-2003 Chevrolet Silverado
2000-2003 Chevrolet Suburban
2000-2003 Chevrolet Tahoe
2000-2003 Chevrolet Venture
2001-2008 Chevrolet Express
2002-2008 Chevrolet Astro
2000-2003 Chevrolet Avalanche
2000-2003 Chevrolet Trailblazer
2003-2008 Chevrolet Blazer
2003-2008 Chevrolet S-10
2003-2008 Chevrolet Trailblazer EXT
2000-2008 Chevrolet Factory Service Bulletin OBDII Code P0300

2002 Chevrolet Blazer P0300 Misfire Diagnostics





User Submitted Video
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 CHEVROLET 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.
OBDII Code P0300 Chevrolet - Cylinder Misfire Detected Random Cylinders - k1no-portal.ru

P0300 CHEVROLET Information for specific Chevrolet models

Need more help?

Do you need more help with the P0300 Chevrolet code? Ask a question to our users or find an automotive repair shop near you to help fix the OBDII code

P0300 CHEVROLET Comments

Help us improve k1no-portal.ru. Leave a comment below or tell us if the information above help you fix the code. What are the symptoms on your vehicle for the P0300 Chevrolet code? Have you replaced any parts?
Any information is appreciated. Thanks
Repair Importance Level: 3
1=Low 2=Medium 3=High
Repair Difficulty Level: 3
1=Easy 2=Moderate 3=Hard

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