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2007 Chevy Avalanche Code P0449

Tiny
SHANAHAN22
  • MEMBER
  • 2007 CHEVROLET AVALANCHE
  • V8
  • 4WD
  • AUTOMATIC
  • 98,000 MILES
My check engine light came on I had the code read and it says its the evaporative emission system vent control circuit intermittent? What needs to be replaced and is it difficult
Sunday, May 9th, 2010 AT 8:24 PM

1 Reply

Tiny
MHPAUTOS
  • MECHANIC
  • 31,938 POSTS
Hi there,

An intermittent fault will be a real pain to track down if you are not very familiar with auto electrical systems, you will need some testing hear, a ECU safe (diode test light) a multi meter and a variety of back probes and a fair amount of patents, if in doubt get this looked at by a mechanic.

Mark (mhpautos)
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Monday, May 10th, 2010 AT 4:10 AM

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