Sevice Stability System inmessage center, and P0449 code
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Cadillac Escalade, EXT and ESV Forum - 1999 - 2006 Discussion, Sevice Stability System inmessage center, and P0449 code in Cadillac Escalade Forums; The message center in my 2002 Escalade shows a Service Stability System warning. Theonly code displayed is P0449, which is ...
  1. #1
    hcubed is offline Cadillac Owners Member
    Automobile(s): 2002 Escalade
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    Sevice Stability System inmessage center, and P0449 code

    The message center in my 2002 Escalade shows a Service Stability System warning. Theonly code displayed is P0449, which is for the evaporative emission control system vent valve/solenoid curcuit malfunction.
    No other codes are present. I can erase the code, and the OBD II shows no codes present or pending.
    I replaced the intake manifold mounted vent solenoid yesterday, but it made no difference. The P0449 code would come back up, and the message center warning would repeat.
    The brakes and throttle are not affected at all. The car drives and operates correctly, regardless of the code and warning.
    I can stop at the side of the road, shut the engine off, restart and drive for various distances, feet or sometimes miles before the message center warning reappears.
    Whats up? Any ideas from an expert?
    Thanks in advance

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  3. #2
    the cadillac man's Avatar
    the cadillac man is offline Cadillac Owners Master
    Automobile(s): 03 cadillac escalade
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    Quote Originally Posted by hcubed
    The message center in my 2002 Escalade shows a Service Stability System warning. Theonly code displayed is P0449, which is for the evaporative emission control system vent valve/solenoid curcuit malfunction.
    No other codes are present. I can erase the code, and the OBD II shows no codes present or pending.
    I replaced the intake manifold mounted vent solenoid yesterday, but it made no difference. The P0449 code would come back up, and the message center warning would repeat.
    The brakes and throttle are not affected at all. The car drives and operates correctly, regardless of the code and warning.
    I can stop at the side of the road, shut the engine off, restart and drive for various distances, feet or sometimes miles before the message center warning reappears.
    Whats up? Any ideas from an expert?
    Thanks in advance
    I'd say the solenoid is failing which will need replacing.

  4. #3
    hcubed is offline Cadillac Owners Member
    Automobile(s): 2002 Escalade
    Join Date
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    Re: Sevice Stability System inmessage center, and P0449 code

    As I stated in my first post, I replaced the solenoid yesterday, and it did no good. Brand new solenoid, $50.00 worth......no joy.
    Is the one you are referring to the one mounted just behind the throttle body on the intake manifold?

  5. #4
    the cadillac man's Avatar
    the cadillac man is offline Cadillac Owners Master
    Automobile(s): 03 cadillac escalade
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    Quote Originally Posted by hcubed
    As I stated in my first post, I replaced the solenoid yesterday, and it did no good. Brand new solenoid, $50.00 worth......no joy.
    Is the one you are referring to the one mounted just behind the throttle body on the intake manifold?
    Nope the evap canister is under the truck that is the area you need to be checking.

  6. #5
    hcubed is offline Cadillac Owners Member
    Automobile(s): 2002 Escalade
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    Re: Sevice Stability System inmessage center, and P0449 code

    Sorry, but you guys had it wrong.
    The wiring for the evap cannister solenoid valve that I changed under the hood had been chewed in half by a squirrel or other rodent. Fixed the damaged wires, erased the code and all is well.

  7. #6
    the cadillac man's Avatar
    the cadillac man is offline Cadillac Owners Master
    Automobile(s): 03 cadillac escalade
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    Quote Originally Posted by hcubed
    Sorry, but you guys had it wrong.
    The wiring for the evap cannister solenoid valve that I changed under the hood had been chewed in half by a squirrel or other rodent. fixed the damaged wires, erased the code and all is well.
    Ok that was a bit odd but at least you got it fixed.

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