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M
Mindy Posted on Feb 27, 2016
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Pcm vacuum diafram cadillac eldorado

Would like diafram of where pcm vacuum hoses run

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Dale Long

  • 192 Answers
  • Posted on May 04, 2009

SOURCE: pcm codes for check engine warning

P1139 = HO2S Insufficient switching Bank 1 Sensor 2
P1140 = HO2S Transition Time Ratio Bank 1 Sensor 2
Heated O2 sensor post converter

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Mike Butler

  • 6674 Answers
  • Posted on May 07, 2009

SOURCE: Check engine light on, 1997 cadillac Deville.PCM codes

PO135 is oxygen sensor Bank1 sensor1. PO404 is EGR.
personally, I'd pull EGR off, clean pintle good with throttle body cleaner or carb cleaner, re-install, erase codes & try it for a while & see if it code(s) come back.

grimm_army

  • 43 Answers
  • Posted on Jun 19, 2009

SOURCE: 1997 cadillac eldorado running hot

Sometimes a vacuume leak can cause overheating problems too.

brandon day

  • 173 Answers
  • Posted on Apr 03, 2010

SOURCE: Where is the pcm located on the 1998 cadillac

pcm is under the hood wher the air filter is

saailer

David Burbee

  • 1871 Answers
  • Posted on Aug 06, 2010

SOURCE: what is pcm p 1483 code on a 1997 cadillac mean ?

Hello! A P1483= Engine cooling system performance...Is; Temperature gauge reading normal (thermostat)...Radiator full, no leaks...Cooling fan operation normal...Upper radiator hose hot when engine reaches normal operating temperature (thermostat)...If not, these are common causes of a P1483...

Guru......Saailer



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1984 Cadillac Eldorado. Wiring for the oil pressure switch please.
Question edited for clarity.
Question moved to model category.

Help in the link. Also click on the images tab

https://www.google.com/search?q=1984+cadillac+eldorado.oil+pressure+switch+wiring+diagram

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Aug 25, 2023 • 1984 Cadillac Eldorado
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2000 Cadillac Eldorado EVAP system
DTC P0452 Fuel Tank Pressure Sensor Circuit Low Voltage

The fuel tank pressure sensor is located on top of the fuel tank.

Circuit Description
The fuel tank pressure sensor measures the pressure (or vacuum) in the fuel tank. The powertrain control module (PCM) provides the sensor with a reference voltage, a signal circuit, and a ground. The sensor returns a signal voltage to the PCM relative to the pressure in the fuel tank. The PCM should see a signal voltage increase as the pressure in the tank decreases (more vacuum). As the pressure in the tank increases (less vacuum), the PCM should see a signal voltage decrease. The PCM uses the sensor signal to test the integrity of the EVAP system. If the PCM detects a signal voltage that is too low, DTC P0452 will set.


Your best bet , take your vehicle to a qualified repair shop.
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Sep 09, 2021 • 2000 Cadillac Eldorado
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1answer

1995 cadillac eldorado . Idle surging . Replaced the TPS ,The Isc . PCM replaced a year ago. No current obd1 codes . Pd codes all normal parameters ranges. pcm supposed to alternate +to-
Surging idle is almost always caused by a vacuum leak, not an electrical issue.
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Jan 19, 2019 • Cadillac Eldorado Cars & Trucks
0helpful
1answer

What is code pcm 1545 on a 2000 caddy
clutch relay A/C control.
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Feb 23, 2013 • 2000 Cadillac Eldorado
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1995 cadillac eldorado with new battery ran good one day and the next day would not start, no warning display, no lights, no nothing but a faint 'buzzing' sound when the key is turned in the i
you can check the plugs on the computer (ecm/pcm)
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Nov 02, 2012 • 1995 Cadillac Eldorado
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1answer

How to fix code P0603 code on 1996 cadillac eldorado
P0603 - Internal Control Module Keep Alive Memory Error

Possible causes- Loose or poor battery terminal connection
- Low battery charge
- ECM/PCM power supply circuit is open or shorted
- ECM/PCM Programing
- Faulty ECM/PCM
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Jun 15, 2012 • Cars & Trucks
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Where is the engine computer located on the 97 cadillac eldorado?
To Remove:
  1. Before servicing the vehicle, refer to the Cautions and Warnings in the beginning of this section.
  2. Record the Transaxle Fluid and Engine Oil Life Indexes
  3. Remove or disconnect the following:
    • The negative battery cable gm_car_cad_sev_intk_air_duct_resontr.gif

    • The screw retaining the intake air duct/resonator (C) to the PCM housing gm_car_cad_sev_air_clenr_cov.gif

    • Air filter housing clamps on top of the air cleaner housing assembly
    • Intake air duct/resonator assembly (B) partially up and remove the air cleaner cover (C) and the PCM
    • Air cleaner element assembly, slide toward the fender to separate the air cleaner element assembly from the air inlet assembly gm_car_cad_sev_pcm_rem.gif

    • PCM connector attaching bolts
    • Two PCM connectors
    • PCM (A)
To Install:
NOTE: If the PCM is being programmed using the Off-Board method, perform the programming before continuing with the steps listed below.
  1. Install or connect the following:
    • PCM
    • PCM connectors; torque connector screws
      1. Torque to: 71 lb-in. (8 Nm)
    • Air cleaner cover onto the air inlet housing
    • Snap the assembly clamps into place
    • Align the intake air duct/resonator assembly
    • The screw onto the intake air duct/resonator assembly
      1. Torque to: 27 lb-in. (3 Nm)
    • Connect the negative battery cable
  2. Program the PCM, if required.
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Jan 28, 2011 • 1997 Cadillac Eldorado
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SeaFoam in my 94 Cadillac Eldorado. Bad idea!
I doubt the Sea Foam had anything to do with that. I'd check for a vacuum hose off, especially by the PCV valve. Maybe a broken hose or the PCV valve itself might be stuck. Maybe just put a new one in, they are not that spendy. No vacuum would explain the brakes not working.
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Jan 31, 2010 • 1994 Cadillac Eldorado
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1995 cadillac eldorado revs up by it self
CSP, It sounds like you have a vacuum leak that is causing the IAC ( idle air control ) motor to move in and out trying to control the idle. Check all vacuum hoses on the engine for disconnect, cracked or damaged. If the hoses crack when you bend them, they need to be replaced.
Let me know what you find and we can go from there.
Regards,
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Feb 24, 2009 • 1995 Cadillac Eldorado
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1answer

Transmission problem
if AAMCO charged you for this faulty diagnosis (sounds like they guessed), because the PCM rarely is the problem on any GM product, less than 3% is the factory stat, and yes they track these things, anyway if they charged u make them refund the money because they screwed up, u say a pin is an open circuit? that is where to concentrate your focus.i
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Jan 09, 2009 • 1994 Cadillac Eldorado
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1984 Cadillac Eldorado. Wiring for the oil pressure switch please.

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