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2003 Chevy Silverado EVAP Code P0449

Tiny
BUTCHW73
  • MEMBER
  • 2003 CHEVROLET SILVERADO
  • V8
  • 2WD
  • AUTOMATIC
  • 54,339 MILES
I have a code in My truck and it keeps coming back.
I tried to retighten the fuel cap and it is fine I inspected the seal and it is good and clean. I have replaced the EVAP control valve and still it pops right back up. How do you find the leaks on the hoses or In the sensor. Or where is the sensor?
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Saturday, January 23rd, 2010 AT 10:45 AM

1 Reply

Tiny
SCOTTY DEE
  • MECHANIC
  • 592 POSTS
Flowing this particular code can be a real bitch. You are going to need a scan tool to monitor fuel tank pressure as well as a smoke machine to determine if there are any leaks in the system. You will probably have to hire a technician to perform the necessary tests.

Look at it this way, you're already out the money for one part that didn't work, don't try for two!
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Wednesday, October 31st, 2018 AT 6:57 PM

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