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Hummer h2 P0300 engine misfire

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  #1  
Old 06-10-2020, 09:48 PM
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Default Hummer h2 P0300 engine misfire

What is my car
 
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  #2  
Old 06-11-2020, 12:17 AM
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according to your scanner it is a truck not a car and the manufacturer is HUMMER
 
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Old 06-11-2020, 04:48 PM
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Originally Posted by Tran
What is my car
Does it look like this?


 
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Old 06-11-2020, 09:55 PM
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My car’s check engine light illuminates my dashboard.. It’s Hummer H2 2005.. I dont know what part in my car has something wrong?
 
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Old 06-11-2020, 11:22 PM
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Dum Gai, Sum Ting Wong.
 
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Old 06-11-2020, 11:31 PM
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Originally Posted by hummerz
Dum Gai, Sum Ting Wong.
What does that mean?
 
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Old 06-12-2020, 08:04 AM
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The ECM computer is telling you the engine is misfiring. You can hunt it down yourself or take to a mechanic. Typical issues are spark plug issue, coil pack issue, vacuum issue, fuel psi, crank or cam sensor issue, head gasket leak...
good luck
 
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Old 06-12-2020, 06:41 PM
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GM P0300 Causes

  • Faulty or worn spark plugs
  • Faulty spark plug wires or coils
  • Faulty fuel injector
  • Vacuum leak
  • Low fuel pressure
  • Camshaft sensor defective
  • Crankshaft sensor defective
  • Engine timing off
  • Leaking head gasket
  • Low engine compression
  • Poor quality fuel
 
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  #9  
Old 06-12-2020, 07:19 PM
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Originally Posted by Mule
The ECM computer is telling you the engine is misfiring. You can hunt it down yourself or take to a mechanic. Typical issues are spark plug issue, coil pack issue, vacuum issue, fuel psi, crank or cam sensor issue, head gasket leak...
good luck
thank you!
 
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  #10  
Old 06-12-2020, 07:20 PM
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Originally Posted by hummerz

GM P0300 Causes

  • Faulty or worn spark plugs
  • Faulty spark plug wires or coils
  • Faulty fuel injector
  • Vacuum leak
  • Low fuel pressure
  • Camshaft sensor defective
  • Crankshaft sensor defective
  • Engine timing off
  • Leaking head gasket
  • Low engine compression
  • Poor quality fuel
thank you!
 
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