What do I do for a 2003 4X4 Chevrolet Avalanche 1500 shows a DTC p300

Tiny
WOLFROM
  • MEMBER
  • 2003 CHEVROLET AVALANCHE
  • 185,000 MILES
I need to fix this it shows the check engine light when I go over railroad tracks and at times when I idle.
Tuesday, December 13th, 2011 AT 5:50 AM

1 Reply

Tiny
RIVERMIKERAT
  • MECHANIC
  • 6,110 POSTS
Engine misfire detected. Check the plugs. Make sure they're properly installed. Make sure the plug wires are properly connected. Check the connectors and grounds for the coil(s).
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Tuesday, December 13th, 2011 AT 5:58 AM

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