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Ses p0446

This is a discussion on Ses p0446 within the General Help forums, part of the LSx Technical Help Section category; Evaporative Emission Control System Vent Control Circuit Anyone know what this means ?...

  1. #1
    Junior Member
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    98Z28

    Ses p0446

    Evaporative Emission Control System Vent Control Circuit

    Anyone know what this means ?

  2. #2
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    98Z28

    Okay , a little more info. Read a post about this so I guess I can rule out gas cap loose the last time I filled up. About three days before light.

    I did get plugs and wires about two weeks ago, so maybe loose or not connected plug or bad vacumm on top passengers side. Is this correct?

  3. #3
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    EVAP codes can be a PITA to diagnose. Friend of mine had P0442, small leak found after pressurizing the system with smoke, girlfriends car kept throwing P0440 large leak, replaced the gas cap and stayed off for 6 months - now rearing it's ugly head again. Maybe you can find something in this link: www.gearchatter.com/viewtopic8704.php

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