dtc p300 what do i do to fix it

2003 CHEVROLET AVALANCHE

185,000 MILES

WOLFROM

MEMBER
2 POSTS
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I need to fix this it shows the check engine light when i go over railroad tracks and at times when i idle. and i changed the spark plugs all cables have been replaced what i wanna know is what do you do with a random or general misfire.

Dec 13, 2011 at 6:10 AM

RIVERMIKERAT

CAR REPAIR CONTRIBUTOR
6,110 POSTS

Same answer here. P0300 means an engine misfire has been detected, Make sure the plug wires are firmly seated on the plugs. Make sure the plugs are properly installed. Make sure the wires for the coil(s) are properly connected and that the grounds are clean and tight.

Dec 13, 2011 at 6:13 AM

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