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check engine light not working

  1. Check engine light doesnt work 2009 cts4

    2008-2013 Cadillac CTS General Discussion
    My check engine light doesn't work at all. Maybe something to do with the pcm? Next step is to check for power to the light from the brown/white stripe wire at the back of the instrument cluster. Anyone else had this issue? I get a P0650 code on scanner. MIL control circuit. Are there any fuses...
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