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Cadillac Allante Forum Discussion, engine light in Past Cadillac Vehicle Discussion; just brought a 91 pearl wt with maroon int 35000 mi. The service engine comes on at low idle and ...
  1. #1
    cdechiaro is offline Cadillac Owners Member
    Automobile(s): 1991 Allante
    Join Date
    Sep 2010
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    engine light

    just brought a 91 pearl wt with maroon int 35000 mi. The service engine comes on at low idle and goes away after 3500 rpm and stays off untill the idle slowes down then comes on agian anny advice

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  3. #2
    OffThaHorseCEO is offline Cadillac Owners Connoisseur
    Automobile(s): 2004 Cadillac SRX V8 AWD, 1989 Cadillac Allanté: Pearl White
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    Re: engine light

    on your climate control center, press and hold "off" and "warmer" (which could be the red square, i dont know if the climate control unit changed by 1991)

    if you did it right all your gauges should light up completely for a second, then the DIC should start showing codes.

    right those down and post them here...

  4. #3
    cdechiaro is offline Cadillac Owners Member
    Automobile(s): 1991 Allante
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    Re: engine light

    Thanks will try

  5. #4
    carnut is offline Cadillac Owners Master
    Automobile(s): 1988 Allante' (sold), 1984 Eldorado, 84 Sedan DeVille
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    Re: engine light

    Hold those buttons for at least 10 seconds to allow it to display any codes.

  6. #5
    OffThaHorseCEO is offline Cadillac Owners Connoisseur
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    Re: engine light

    i meant write by the way, of course i would overlook that

    anyway, did you find any codes?

  7. #6
    cdechiaro is offline Cadillac Owners Member
    Automobile(s): 1991 Allante
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    Re: engine light

    work is getting in the way will get soon and post codes. also car was in shop getting a new top. just got back today.

  8. #7
    cdechiaro is offline Cadillac Owners Member
    Automobile(s): 1991 Allante
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    Re: engine light

    Just got a chance to get the codes from my car the one listed as current is eo90 or ed 90 could not make out if it was a d or o anny help on thos wpuld be appreciated

  9. #8
    OffThaHorseCEO is offline Cadillac Owners Connoisseur
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    Re: engine light

    it would be a zero. i couldnt find anything for E090 though.

    here are possible matches:
    E020 Open Fuel Pump Circuit
    E030 ISC Circuit Problem
    E040 Power Steering Pressure Switch Circuit Problem
    E060 Cruise - Transmission Not in Drive CRUISE

    based on you describing the light comin on at low idle i would say its this
    E030 ISC Circuit Problem

    ISC is the idle speed control, which tells the motor what speed to idle at. mine is acting up right now as well. you can pay $100+ for a brand new part at the auto parts store or grab one from a salvage yard for under $20. Ive been told that it can come from any 4.1,4.5 or 4.9 motor which makes your chances of finding one veeeeery good.


    heres the whole list if youre interested:

    Cadillac Allante models, 1987, 1988, 1989, 1990, 1991, 1992
    may also apply to other Cadillac models of the period.

    Codes ABS, ECM, BCM
    ABS - Anti-Lock Diagnostic Codes

    1 Left Front Valve Problem
    2 Right Front Valve Problem
    3 Right Rear Valve Problem
    4 Left Rear Valve Problem
    5 LF WSS Low Output
    6 RF WSS Low Output
    7 RR WSS Low Output
    8 LR WSS Low Output
    9 LF/RR WSS Signal Error
    10 RF/LR WSS Signal error
    11 Valve Relay Circuit Problem
    12 Replenishing Valve Circuit Problem
    13 Improper Booster Sequence - Pressure
    14 Improper Booster Sequence - Piston Travel
    15 Improper Booster Sequence - Brake Light Switch
    16 EBCM error


    ECM Diagnostic Codes

    E012 No distributor signal
    E013 Rt. Oxygen Sensor Not ready
    E014 Shorted Coolant sensor Circuit AIR
    E015 Open Coolant sensor Circuit AIR
    E016 Generator Voltage Out of Range / All solenoids, Except Shift Solenoids
    E017 Left Oxygen Sensor Not ready
    E019 Shorted Fuel Pump Circuit
    E020 Open Fuel Pump Circuit
    E021 Shorted Throttle Position sensor circuit VCC
    E022 Open Throttle Position sensor circuit VCC
    E023 EST/Bypass Circuit problem AIR
    E024 Speed sensor Circuit problem VCC, CRUISE
    E026 Shorted Throttle Switch Circuit EGR
    E027 Open throttle Switch Circuit EGR
    E028 Open third or Fourth Gear Circuit or Shorted 2-3 / Shift solenoid VCC, CRUISE
    E029 Shorted third gear Switch Circuit or Open 2-3 / Shift solenoid VCC, CRUISE
    E030 ISC Circuit Problem
    E031 Shorted MAP Sensor Circuit AIR
    E032 Open MAP Sensor Circuit AIR
    E034 MAP Sensor Signal Too High AIR
    E037 Shorted MAT Sensor Circuit AIR
    E038 Open MAT Sensor Circuit AIR
    E039 VCC Engagement Problem VCC
    E040 Power Steering Pressure Switch Circuit Problem
    E041 Cam Sensor Circuit Problem
    E042 Left Oxygen Sensor signal Lean / AIR, CL canister purge
    E043 Left Oxygen sensor Signal signal Rich / AIR, CL canister purge
    E044 Rt. Oxygen Sensor Signal Lean / AIR, CL canister purge
    E045 Rt. Oxygen Sensor Signal Rich / AIR, CL canister purge
    E046 Right to Left Bank Fueling Imbalance
    E047 BCM - ECM Data Problem
    E048 EGR systém Fault EGR
    E049 AIR Management Systém Fault AIR
    E052 ECM Memory Reset Indicator
    E053 Distributor Signal Interrupt
    E055 TPS Misadjusted
    E056 Open Fourth Gear Switch circuit or Shorted 3-4 / Shift solenoid VCC
    E057 Shorted Fourth Gear Switch circuit or Open 3-4 / Shift solenoid VCC
    E059 Trans. Temperature sensor circuit problem VCC
    E060 Cruise - Transmission Not in Drive CRUISE
    E061 Cruise - Vent Solenoid circuit Problem CRUISE
    E062 Cruise - Vacuum Solenoid Circuit Problem CRUISE
    E063 Cruise - Car Speed And Set Speed / Difference Too high CRUISE
    E064 Cruise - Car Acceleration Too High CRUISE
    E065 Cruise - Servo Position Sensor Failure CRUISE
    E066 Cruise - Engine RPM Too High CRUISE
    E067 Cruise - Switch Shorted During Enable CRUISE


    BCM Diagnostic Codes

    B110 Outside Air Temperature Circuit Problem
    B111 A/C High Side Temperature Circuit Problem
    B112 A/C Low Side Temperature Circuit Problem / A/C Clutch
    B113 In - Car Temperature Circuit Problem
    B115 Sunload Temperature circuit Problem
    B119 Twilight Sentinel Photosensor circuit Problem / Twilight Sentinel
    B120 Twilight Sentinel Delay pot Circuit Problem
    B122 Panel Lamp Dimming Pot Circuit Problem
    B124 Speed Sensor Circuit Problem
    B127 PRND321 Sensor Circuit Problem / Park Break Relase
    B132 Oil Pressure Sensor Failure
    B334 Loss Of ECM Data
    B335 Loss Of CCDIC Data
    B336 Loss Of IPC Data
    B337 Loss Of Programmer Data / A/C Clutch, Park Brake Relase
    B410 Charging System Problem
    B411 Battery Volts Too low
    B412 Battery Volts Too High
    B420 BCM Output Driver / 1 Failure
    B421 BCM Output Driver / 2 Failure
    B440 Air Mix Door Problem
    B441 Cooling Fans Problem
    B446 Low A/C Refrigerant Condition Warning
    B447 Very Low A/C Refrigerant Condition Warning / A/C clutch
    B448 Very Low A/C Refrigerant Pressure Condition / A/C clutch
    B449 A/C High Side Temperature Too High / A/C clutch
    B450 Coolant Temperature Too High / A/C clutch
    B480 Loss of ABS Communication
    B481 ABS Fault
    B552 BCM Memory Reset Indicator
    B556 BCM EEPROM Error

    got it from Stealth at cadillacforum .com

    edit: woooow really? you guys censor the name of other cadillac forums? thats petty.

  10. #9
    tvbest is offline Cadillac Owners Member
    Automobile(s): allante
    Join Date
    Sep 2010
    Age
    38
    Posts
    7

    Re: engine light

    my 92 was doing the same thing and I put some fuel injector (lucas)cleaner in the gas tank. I put in a full bottle on a half of tank of gas. I did it twice and now I have no problems.

  11. #10
    Moose123 is offline Cadillac Owners Member
    Automobile(s): 1988 Allante
    Join Date
    Mar 2009
    Posts
    88

    Re: engine light

    I was thinking you might also want to make sure you have a good gas cap...Make sure it clicks and seals. May be a long shot but I beleave in starting with the easy items first.

  12. #11
    cdechiaro is offline Cadillac Owners Member
    Automobile(s): 1991 Allante
    Join Date
    Sep 2010
    Posts
    11

    Re: engine light

    Found the problem the cam sensor was faulting. went off at high revs. Talked to Dick at allantesource changeing distrbutor and all wires and plugs he says its easier than trying to change sensor allso cheeper. Was going to change plugs and wires anny way

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