3.5L Code 25 - High RPM @ Idle

Discussion in 'General Motoring' started by Bob Shuman, May 11, 2008.

  1. Bob Shuman

    Bob Shuman Guest

    My son's 1996 3.5L Eagle Vision TSI (92K miles) has started idling at ~1600
    RPM (even when the engine is warm). The check engine light is lit and the
    on/off/on/off/on key trick displays a code 25, which appears to be related
    to the AIS.

    I've cleaned the two throttle bodies and attempted to find any loose or
    cracked vacuum lines, but they all appear to be fine. At this point, I'd
    appreciate ideas on other possible causes and any troubleshooting procedures
    that might be employed to try to isolate the problem.

    Otherwise, the car looks great and seems to run pretty well for being 12+
    years old. Thanks in advance for your thoughts.

    Bob Shuman, May 11, 2008
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  2. Bob Shuman

    Mike Guest

    Code 25: A short or open condition detected in one or more of the idle air
    control motor circuits.
    Mike, May 11, 2008
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  3. Bob Shuman

    Joe Pfeiffer Guest

    What did you find when you inspected the AIS motor and its wiring?
    Joe Pfeiffer, May 12, 2008
  4. Bob Shuman

    Bob Shuman Guest

    Everything looked good from a physical connection standpoint. Is there a
    test procedure that can be performed with a simple DVM to verify the wiring
    continuity? Thanks.

    Bob Shuman, May 12, 2008
  5. Bob Shuman

    Joe Pfeiffer Guest

    I don't have an FSM for the first-generation LH body, sorry.
    Joe Pfeiffer, May 12, 2008
  6. Bob Shuman

    Bob Shuman Guest

    My son has an appointment at the local 5-star Chrysler dealer tomorrow. He
    told them it had a CEL and code 25 and was warned it will be $125 for the
    diagnostic only ...I'll let you know what they find so others can hopefully

    BTW, The car was mine originally and is now officially 12+ years old. Since
    I've done all the maintenance over those years, it has been back to the
    dealer only twice and both times were to perform recalls, with no cost to
    the owner.

    Bob Shuman, May 13, 2008
  7. Get the specific obd2 code, for $125 you could get yourself a decent code
    Phillip Mcracken, May 14, 2008
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