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Thread: does the engine managemant light have to be on to have a fault code.

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    Regular Member davedave's Avatar
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    Default does the engine managemant light have to be on to have a fault code.

    hi people
    i think i might have a fault code , but i was wondering does the engine managemant light have to be on to have a fault
    cheers

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    Fault only active if engine management light is on when the engine is running.

    If its on when the ignition is on then there is an old fault stored that isn't causing problems anymore.

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    Regular Member davedave's Avatar
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    my vectra turbo keeps idling up and down and then very low when i slow the car down , and now its started cutting out when i slow the car right down , any ides anyone

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