Code P0603
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Northstar Engines and System Technical Discussion Discussion, Code P0603 in Cadillac Engine Technical Discussion; P0603 - Control Module Long Term Memory Reset Hmmm this is a new one, what does it mean?...
  1. #1
    planocolt is offline Cadillac Owners Member
    Automobile(s): 1999 sts
    Join Date
    Dec 2008
    Posts
    65

    Code P0603

    P0603 - Control Module Long Term Memory Reset

    Hmmm this is a new one, what does it mean?

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  3. #2
    Ranger's Avatar
    Ranger is online now Cadillac Owners Member
    Automobile(s): White Diamond '03 DHS (with floor shift)
    Join Date
    Jun 2004
    Location
    Woodstock Ill.
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    66
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    70,310

    Re: Code P0603

    Have you pulled battery power?

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