Cabin Air Filter & DIM Error Code in 2003 STS
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Cadillac Seville / Cadillac Eldorado Forum Discussion, Cabin Air Filter & DIM Error Code in 2003 STS in Past Cadillac Vehicle Discussion; I changed out my cabin air filter in my 2003 STS and the damn thing slipped or didn't seat correctly ...
  1. #1
    JackinSanDiego is offline Cadillac Owners Member
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    Cabin Air Filter & DIM Error Code in 2003 STS

    I changed out my cabin air filter in my 2003 STS and the damn thing slipped or didn't seat correctly when inserting the 3rd filter (almost lost the 1st two but pulled them out with needle nose pliers). I was able to close and secure cover, and it seemed to change the vent air flow a little bit, but noticed that I had a code come up, Air Cond. Overpressure, DIM B1324.

    * Could the filter have unseated and fallen against the condenser, causing the error code?
    * The condenser was filthy when reaching in, is there anyway of cleaning it?

    And yes, it was a PITA to pull out and reinsert, but will try to re-install if you think that is the problem.

    * Also, when the "Service Engine Soon" light comes on, what is it trying to tell me?

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  3. #2
    rodnok01's Avatar
    rodnok01 is offline Cadillac Owners Connoisseur
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    Pull your codes as a P code has set the SES. The filter has nothing to do with the over pressure code.

  4. #3
    Ranger's Avatar
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    Re: Cabin Air Filter & DIM Error Code in 2003 Seville STS



    A/C overpressure is referring to the refrigeration system, not cabin air flow.

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    basscatt's Avatar
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    Re: Cabin Air Filter & DIM Error Code in 2003 Seville STS

    Quote Originally Posted by JackinSanDiego View Post
    I changed out my cabin air filter in my 2003 STS and the damn thing slipped or didn't seat correctly when inserting the 3rd filter (almost lost the 1st two but pulled them out with needle nose pliers). I was able to close and secure cover, and it seemed to change the vent air flow a little bit, but noticed that I had a code come up, Air Cond. Overpressure, DIM B1324.

    * Could the filter have unseated and fallen against the condenser, causing the error code?
    * The condenser was filthy when reaching in, is there anyway of cleaning it?

    And yes, it was a PITA to pull out and reinsert, but will try to re-install if you think that is the problem.

    * Also, when the "Service Engine Soon" light comes on, what is it trying to tell me?
    ========================
    Could the filter have unseated and fallen against the condenser
    doubtful -
    the condenser is located in front of the radiator -

    The condenser was filthy when reaching in
    I assume you mean the EVAPORATOR -

    is there anyway of cleaning it?
    not without pulling stuff apart -

    will try to re-install if you think that is the problem.
    I never re-installed one after removing mine the first time -
    never had any problem -

    Also, when the "Service Engine Soon" light comes on,
    what is it trying to tell me?

    it means an emissions-related problem exists -
    and should be checked out immediately -

    pull the codes -

    the code(s) will determine the action you need to take -

  6. #5
    Submariner409's Avatar
    Submariner409 is offline If it won't run, stick on fender vents
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    Re: Cabin Air Filter & DIM Error Code in 2003 Seville STS

    Quote Originally Posted by JackinSanDiego View Post
    * The [evaporator] was filthy when reaching in, is there anyway of cleaning it?
    I used the thin tip on the ol' Hoover hose. Left the damn cabin air filter out - the car is garaged and I don't park under trees or shrubbery. Lotsa airflow.


    Jack,
    Hint: Our HVAC systems will always try to maintain cabin air temperature - even when turned off. Don't want A/C on a nice day ?? Set the cabin temp to 60 = cool air flows through the car. Don't want A/C on a nice, cool fall day ?? Set the temp to 72. Moderately warm air flows through the car.

    Flows through the car ????? !!!!!! Yep - the outside air inlet door never fully closes and there are two flapper vents in the lower part of each rear fenderwell (a low pressure area at speed). "Cadillac Flow-Through Ventilation". When you lift the carpet and filler panels in the trunk, looking for the flapper vents, make sure the black multiple ground boxes are tight on their mounting studs. Common tail light/trunk equipment electrical problem area.

  7. #6
    JackinSanDiego is offline Cadillac Owners Member
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    Re: Cabin Air Filter & DIM Error Code in 2003 Seville STS

    You pros offer great guidance and save us time and gray hairs. And thanks for the help with understanding the air and ventilation system too.

    Okay, the Service Engine Soon keeps going on and off, rather, off and on. I pulled codes, received two, and this is what I got:

    PCM P0101 Mass Air Flow (MAF) Sensor Performance

    PCM P0174 Fuel Trim System Lean Bank 2

    What should I do Gents to correct?

    Thanks Again,

    J

  8. #7
    BigPimpinCaddy's Avatar
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    Re: Cabin Air Filter & DIM Error Code in 2003 Seville STS

    Quote Originally Posted by JackinSanDiego View Post
    You pros offer great guidance and save us time and gray hairs. And thanks for the help with understanding the air and ventilation system too.

    Okay, the Service Engine Soon keeps going on and off, rather, off and on. I pulled codes, received two, and this is what I got:

    PCM P0101 Mass Air Flow (MAF) Sensor Performance

    PCM P0174 Fuel Trim System Lean Bank 2

    What should I do Gents to correct?

    Thanks Again,

    J
    That specifically I had that would illuminate the SES light off and on

    Check for vacuum leaks in bank 2 (Front bank)
    I sprayed carb cleaner over the lines til I heard a rpm change, then kept spraying around the same area trying to pinpoint the leak

    ----------

    As for the MAF code, "Any loss of vacuum to the MAP sensor can cause this DTC to set."
    That's from a google search. Could possibly pinpoint both problems together...

    But, here's what the page fully said to look for
    Inspect for the following conditions: An incorrectly routed harness--
    Inspect the harness of the MAF sensor in order to verify that it is not routed too close to the following components:
    - The secondary ignition wires or coils
    - Any solenoids
    - Any relays
    - Any motors
    A low minimum air rate through the sensor bore may cause this DTC to set at idle or during deceleration.
    Inspect for any vacuum leaks downstream of the MAF sensor.
    A wide open throttle (WOT) acceleration from a stop should cause the MAF sensor g/s display on the scan tool to increase rapidly. This increase should be from 6-12 g/s at idle to 230 g/s or more at the time of the 1-2 shift. If the increase is not observed, inspect for a restriction in the induction system or the exhaust system.

    The barometric pressure (BARO) that is used in order to calculate the predicted MAF value is initially based on the MAP sensor at key ON.

    When the engine is running the MAP sensor value is continually updated near WOT. A skewed MAP sensor will cause the calculated MAF value to be inaccurate. The value shown for the MAP sensor display varies with the altitude. With the ignition ON and the engine OFF, 103 kPa is the approximate value near sea level. This value will decrease by approximately 3 kPa for every 305 meters (1,000 feet) of altitude.

    A high resistance on the ground circuit of the MAP sensor can cause this DTC to set.

    Any loss of vacuum to the MAP sensor can cause this DTC to set.

  9. #8
    Submariner409's Avatar
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    Re: Cabin Air Filter & DIM Error Code in 2003 STS

    Jack, For your 2003 STS MAF/mixture codes, first check the 3 band clamps on the intake ducting, the flex duct for cracks, and that damned useless intake resonator - it tends to pop out of its hole in the top of the flex duct - that causes immediate fuel mixture and airflow errors. ANY air leak at or after the MAF sets mixture codes.

    Here's an elegant solution, as well as making underhood (transmission level) checks easier. A 2" PVC pipe cap, $1.25 at any hardware store, painted semi-gloss black.

    More pictures and diagrams in my albums - click my username, open the profile, left column, 2 albums 6 pages of Seville/Northstar stuff.
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    Re: Cabin Air Filter & DIM Error Code in 2003 STS

    P0174
    This is a 2000+ engine, but yours will be similar. Check the EGR clean air line on the front cam cover. It's visible in the upper right of this picture, plugged in right next to the ICM connector.


  11. #10
    Submariner409's Avatar
    Submariner409 is offline If it won't run, stick on fender vents
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    Re: Cabin Air Filter & DIM Error Code in 2003 STS

    That's the PCV clean air line. ...................comes from the atmospheric side of the throttle butterfly in the TB.

    #1 is the PCV dirty air line - attached to the nipple on the cam cover to the left in your picture. Clean air line not depicted.

    Any leak in the dirty air line will cause mixture codes, too. Common problem areas are the rubber connector at the PCV valve/orifice and at the intake manifold fitting connector.

    Clean air is allowed into the left valve area, circulates down into the crankcase, then back up to the right valve area where the PCV valve (early) or metered orifice (late) feeds to the vacuum in the intake manifold.
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