My next set of DTC's

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Cadillac DeVille 1985 to 2005 including:
1985-1992 Fleetwood, 1993 Sixty Special, All FWD Forum Discussion, My next set of DTC's in Past Cadillac Vehicle Discussion; Well I finally got rid of those pesky EGR codes. Yay! hers my next set to work on: PCM P0741 ...
  1. #1
    Mr.Pink is offline Cadillac Owners Member
    Automobile(s): 2001 Deville, 4.6L
    Join Date
    Mar 2013
    Jeff City, MO

    My next set of DTC's

    Well I finally got rid of those pesky EGR codes. Yay! hers my next set to work on:

    PCM P0741 - Torque Convert Clutch System Stuck Off
    I have no other codes associated with this one (like p18xx whatever it is about the solenoid) so Im thinking its the real thing.
    I have no noticeable transmision problems so, what to do? Just ignore it like I do with my AIR pump code?

    DIM P1540 - P1540 - Air Conditioning (A/C) Refrigerant Overpressure - Air Conditioning (A/C) Disabled
    Before I got the car, the previous owner tried refilling it with one of those AC kits because it wasnt blowing cold air. So I dont really know what the deal is with this one. I guess they overfilled it and so the compressor is automatically shut off? How do I correct this one?

    Looking forward to your answers! Thanks - PINK

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  3. #2
    70cougar is offline Cadillac Owners Enthusiast
    Automobile(s): 2002 DTS, 70 Cougar conv
    Join Date
    Dec 2009

    Re: My next set of DTC's

    Many people ignore P0741, and just live with lower gas mileage of maybe 1-2 mpg at cruising speeds, caused by higher engine revs without TCC lock-up. This works fine unless you have to pass emission testing where you live - P0741 will cause you to fail.

  4. #3
    basscatt's Avatar
    basscatt is offline Cadillac Owners 10000+ Posts
    Automobile(s): two 02 DHS's, 03 SLS, 95 Sedan DeVille, 89 Coupe DeVille
    Join Date
    Feb 2004

    Re: My next set of DTC's

    EVERYTHING you could possibly want to know
    about the P0741 code is right here - with pics of the problem -

    P1540 - Air Conditioning (A/C) Refrigerant Overpressure
    those mickey-mouse AC kits
    are probably responsible for DAMAGING more AC systems they they fixed -

    the typical - "a little more should make it even colder" mentality -

    connect a real set of guages -
    and adjust the pressure where it should be -

  5. #4
    Ranger's Avatar
    Ranger is offline Cadillac Owners Member
    Automobile(s): White Diamond '03 DHS (with DTS floor shift)
    Join Date
    Jun 2004
    Woodstock Ill.

    Re: My next set of DTC's

    Live with P0741 and clear it when it pops up (I do). Too expensive to fix and not worth it. Just do a search for it as it's been discussed a hundred times.

    As for the P1540, you could bleed off some pressure, but then you will still have the original problem the the previous owner tried to fix to deal with (unless it was truly low and he just added too much).

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