2004 Chevy Impala Trouble code 455

Tiny
HIGGY5192
  • MEMBER
  • 2004 CHEVROLET IMPALA
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 126,384 MILES
Hi guys. My Impala has a error code 455 and I am wondering how to fix this. I know that it cannot be the gas cap because of the fact that it is not loose and fits snugly. I have pretty much narrowed it down to a emission control leak. I do not know much about cars, so what is this "emission control system" and how do I fix this leak? If you could please put your answer in as simple of terms as possible, that would be greatly appreciated. Thanks a bunch!
Tuesday, October 12th, 2010 AT 4:46 PM

1 Reply

Tiny
MMPRINCE4000
  • MECHANIC
  • 8,548 POSTS
The PCM is indicating a "gross leak or no flow".

The system includes purge and flow solenoids which route tank gas vapor back to intake.

You would need to have the solenoids tested for correct operation. A dealer or trusted garage can do this.
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Wednesday, October 13th, 2010 AT 9:15 AM

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