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  1. 03-11-2008, 10:10 PM #1
    hmccall3
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    Default OBD-II port not working

    Hey guys, I have a 2001 Silvy that keeps tripping the CEL every time I fill up. It's a problem with the fuel canister purge valve. I have been using my code reader to reset the light, but now the reader wont power on or self test when plugged into the port. I tried the reader in other vehicles and it seems to work fine, so I'm thinking it may be the port itself.
    I have checked for loose wiring and such.
    Anyone have any insights on this?
    Thanks in advance for any help!
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  2. 03-11-2008, 11:02 PM #2
    Gmcsuvguy
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    There is a fuse for it... I can't remember which one it is in the fuse box right now...
    Ken Beida
    2010 GMC Sierra Crew Cab 4X4, 5.3L
    2009 GMC Sierra Denali, 6.2L = 403hp, AWD, Full load
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  3. 03-12-2008, 01:43 PM #3
    hmccall3
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    Default

    Thanks for the reply! I thought it may be a fuse issue, but the manual doesn't list a fuse for it specifically. Guess it's time to check each one individually.
    Thanks again
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  4. 03-12-2008, 03:39 PM #4
    Crawdaddy
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    I know on a Katrina truck, the OBD-II port didn't work because the power wire in the connector corroded to hell and didn't have a connection anymore. No power equals no OBD worky...
    Christopher

    1991 Chevy Suburban 1/2 ton 2WD w/ chevy SBC 350-3/4 ton drivetrain upgrade w/4.10 gears 194K miles
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  5. 03-13-2008, 01:16 AM #5
    30 Yr GM Tech Burn-out
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    Default

    check the cig ltr fuse.
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