1990 Seville Engine light!
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Cadillac Seville / Cadillac Eldorado Forum Discussion, 1990 Seville Engine light! in Past Cadillac Vehicle Discussion; P049 (E049) .............................. Air Injection Reaction (AIR) System Fault How do i fix this code...? Also my radiator fans are ...
  1. #1
    BDCadillac is offline Cadillac Owners Member
    Automobile(s): 1990 Cadillac Seville
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    1990 Seville Engine light!

    P049 (E049) .............................. Air Injection Reaction (AIR) System Fault

    How do i fix this code...?

    Also my radiator fans are not working or either not kicking on how can i fix them without buying new ones. What temperature should the turn on at? I think it may be a fuse or relay or something.

    Proud owner of a 1990 Diamond white Mint Condition Cadillac Seville

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  3. #2
    MoistCabbage's Avatar
    MoistCabbage is online now Cadillac Owners 10000+ Posts
    Automobile(s): Crimson 2001 Seville STS, 1990 Seville (RIP)
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    You'll have to verify that the pump works, that all hoses/piping are undamaged and connected, that the check valves are functional, and that the diverter valve is functional. A FSM would be very helpful.

  4. #3
    drewsdeville is offline Cadillac Owners Master
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    Re: 1990 Seville Engine light!

    I wrote up a summary of this system's operation a while back. Check here:

    http://www.cadillacforums.com/forums...solutions.html

  5. #4
    basscatt's Avatar
    basscatt is offline Cadillac Owners 10000+ Posts
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    Re: 1990 Seville Engine light!

    rusted out diverter valve was a very common problem - start there

  6. #5
    drewsdeville is offline Cadillac Owners Master
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    Re: 1990 Seville Engine light!

    The diverter valve assembly is plastic...

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