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Engine Light Issues

This is a discussion on Engine Light Issues within the General Help forums, part of the LSx Technical Help Section category; i have a 2007 silverado classic with 4.8l V8. the engine light is on and i put the reader on ...

  1. #1
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    Black
    2002 Camaro Z28

    Engine Light Issues

    i have a 2007 silverado classic with 4.8l V8. the engine light is on and i put the reader on it and it said the HVAC. i cleared it and it still comes back. what can i do to get rid of it or fix it? the codes are...

    P0442 - EVAP Emission Control System Leak (small).
    P0449 - EVAP Emission Control System Vent Vlv/SoL Malf.

    i have no idea what this means, hope someone can tell me what to do to fix this thanks.

  2. #2
    Member Goldcuffs's Avatar
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    2000 Trans Am

    How many miles are on the truck? I believe the emission systems on those are warrantied for 80,000 miles. If it's over that put a vent solenoid on it. (it's near the fuel tank under the truck)

  3. #3
    Give me a place to stand. levityinc3's Avatar
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    2000 SS '89 IROC-Z

    Yeah probably your cat or an o2 sensor.

  4. #4
    Junior Member
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    red
    1967camaro & 02 trans am

    po449 is a evap emisions vent valve problem, you will need a new vent valve. there is a updated part now for this problem. gm has updated a new style vent valve need to go to dealer if you are out of factory warranty the dealer might good will repairs.

  5. #5
    Single Malt rbob93's Avatar
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    Sebring Silver
    2000 CamaroSS

    PO442 could be as simple as your gas cap not installed correctly

    A bad gas cap or non conforming one ( non genuine replacement)
    A small leak or hole in a fuel vapor hose or tube
    Some other small leak in the EVAP system
    Or a faulty O-ring seal
    Last edited by rbob93; 03-02-2009 at 07:43 PM.

  6. #6
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    2002 Camaro Z28

    ya the truck has 73000. ok thanks guys

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