Question about 1994 Cadillac DeVille

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''What is PO48 Current'' and ''PCM?''

When I press the off and warmer buttons to get codes, "PO48 Current" came up. What is this? Also what is "PCM?"?

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Po48 is an EGR system malfunction in the PCM...powertrain control module AKA computer..brain....The EGR valve isnt opening when it should. Either it leaks or there is no vacuum supply or the passage is blocked with carbon

Posted on Nov 20, 2008

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1996nourthstar eldirado hard start then surges while idle


Could be a lot of things, but the fuel pressure regulators break frequently and that causes an extended crank. As a matter of fact, if it were my car, I would just put one on.

Is the " service engine soon" light on? If is, I would start there. I think checking the codes is easy on that year. Turn the key on. Press and hold the "off" and "warmer" buttons on the climate controls until the instrument cluster lights up like a tree. Release the buttons and let us know if there are PCM codes. They are 'Pxxxx' format. If there aren't any, it will say no PCM codes.

It could also have a vacuum leak, or a clogged injector. Something like that...

Nov 10, 2014 | 1996 Cadillac Eldorado

1 Answer

How do you find fault codes on a 91 cadillac deville


Turn your key to run (engine not running).
Press and hold the OFF and Warmer buttons on your A/C Heater Control Head.
All the segments will light up.
Look over at your FDC (Fuel Data Center).
Codes will be ran starting with E, then EE, then F, then FF and ending with .7.0.
The E codes are engine codes (current and history) and the F codes are body.

Oct 23, 2013 | Cadillac DeVille Cars & Trucks

2 Answers

Can i recive codes from my climate contral panel on a 1996 caddy


To check the computer for CODES:
1. Ignition switch ON. Engine OFF
2. Simultaneously push and hold the OFF and WARMER buttons on the climate control panel for 3 seconds and release them
3. See if you get codes such as AC1347 or AC1348 or some other LETTER/NUMBER combination display on the fuel data display along with HISTORY or CURRENT with each code or codes that display...
- AC1312 = AC high side temp sensor has an open circuit.
- AC1314 = Evaporator inlet temp sensor has an open circuit.
- AC1348 = Very low AC refrigerant condition.

Try addind about 1/2 can of freon to the system and see if the compressor engages. If not, you will need to perform some diagnostic tests on the above codes. I can e-mail you the pictures and directives on how to fix the codes, But first you need to clear (ERASE) the codes from the computer and see which codes return as current or history codes which should display just after each code.

4. After the code or codes display you will see PCM?
5. Turn ignition OFF.

To clear the codes:
1. Re-enetr diagnostics like you did before and when you see PCM?
2. Push and release the LO button and you will see IPC?.
3. Push and release the LO button and you will see ACM?.
4. Push and release the HI button and you will see ACM CODES?
5. Push and release the LO button and you will see ACM CLEAR CODES?
6. Push and release the HI button and you will see ACM CODES CLEAR.
7. Turn OFF ignition key and wait 2 minutes and re-enter diagnostics like I told you in the previous e-mail and let me know what codes appear and if they are CURRENT or HISTORY.

Hope helped.

May 26, 2010 | 1996 Cadillac Eldorado

2 Answers

I have a 93 caddy deville and cannot find a site to tell me what the codes mean


this site has alot of info:

http://myweb.accessus.net/~090/dtcobd1.html

Hope this is what you need!!!

ABS (Antilock Brake System)
AMP (Amplifier)
DDM (Door Driver Module)
DIM (Dash Integration Module)
IPC (Instrument Panel Cluster)
IPM (Instrument Panel Module)
IRC (Integrated Radio Module)
PCM (Powertrain Control Module)
RFA (Remote Function Actuation)
RIM (Rear Integration Module)
SDM (Sensing and Diagnostic Module) Includes airbag crash data. Under RF seat
VTD (Vehicle Theft Deterrent)
MSM (Memory Seat Module)
TTM (Tilt/Telescoping Module)
RSS (Road Sensing Suspension)
____________________________________________________________

How To Pull Codes To check for Diagnostic Trouble Codes stored in the computer, turn the ignition on, then hold down the OFF and WARMER (for digital dash) or OFF and passenger-WARMER buttons (for analog dash) or OFF and "Info ^" buttons (if you have temperature dials) until all of the dash lights come on. The digital display will then show any codes stored. Be prepared to write them down. When it's done, you will probably see "PCM?" At that point, press the OFF button 3 or 4 times until the dash goes back to normal, or just turn off the ignition.

Oct 09, 2009 | 1993 Cadillac DeVille

2 Answers

How can I check the computer for alarms in the past and how do I clear them so I can trouble shoot a problem? where do I get a list of the code? for a 1999 Cadillac deville. Thanks


HOW TO "ENTER" DIAGNOSTIC MODE OBDII

To enter diagnostic mode, proceed as follows:

1. Turn ignition "ON." Engine can be either OFF or RUNNING.

For cars equipped with the Digital Instrument Panel Display (Digital IPC):
2. Simultaneously press the "OFF and "WARMER" (red) buttons on climate control center (CCC) until all display segments (IPC and CCP) are illuminated

For cars equipped with the Analog Instrument Panel Display (Analog IPC):
3. Simultaneously press on the Climate Control Panel (CCP) the "OFF" and "PASS WARMER" (up arrow) buttons.

After the segment display test, the driver message center displays all set DTC, current and history, in the following order:

1. PCM DTC
2. IPC DTC
3. ACM DTC
4. SDM DTC
5. TCS DTC
6. PZM DTC
7. IRC DTC
8. RFA DTC
9. CCP DTC
10. MSM DTC
11. MMM DTC
12. PHN DTC

The RSS, CCP, MSM, MMM and PHN DTC appear only on vehicles equipped with these options. Press the FAN DOWN button in order to bypass the DTC display.

On the OBD II cars, the prefixes you'll see are: "IP" for the IPC instrument panel; "AC" for air conditioning module; "TC" for traction control; "RS" for the road suspension system; "SD" for the air bags; "PZ" for the body control module; "CC" for the cell phone; "RF" for the integrated radio system.



HOW TO "EXIT" DIAGNOSTIC MODE

To exit the diagnostic mode anytime during the test, depress the "ECON" or "DEFOG" button, or turn the ignition switch "OFF." .

You don't need a scan tool for these cars,as it is all built in.

Go to the following website for a list of trouble codes.

http://myweb.accessus.net/~090/dtcobd2.html

Add a comment to your post if you require any further assistance.

Hope this helps.

Oct 07, 2009 | 1999 Cadillac DeVille

4 Answers

Engine needs service soon won't go off


On these cars no scan tool is needed, you can run a self diagnostic check from the dashboard as it is all built in.

To enter diagnostic mode, proceed as follows:
  1. Turn ignition "ON." Engine can be either OFF or RUNNING. For cars equipped with the Digital Instrument Panel Display (Digital IPC):
  2. Simultaneously press the "OFF and "WARMER" (red) buttons on climate control center (CCC) until all display segments (IPC and CCP) are illuminated For cars equipped with the Analog Instrument Panel Display (Analog IPC):
  3. Simultaneously press on the Climate Control Panel (CCP) the "OFF" and "PASS WARMER" (up arrow) buttons.
After the segment display test, the driver message center displays all set trouble codes, current and history, in the following order:
  1. PCM DTC
  2. IPC DTC
  3. ACM DTC
  4. SDM DTC
  5. TCS DTC
  6. PZM DTC
  7. IRC DTC
  8. RFA DTC
  9. CCP DTC
  10. MSM DTC
  11. MMM DTC
  12. PHN DTC
  13. The RSS, CCP, MSM, MMM and PHN DTC appear only on vehicles equipped with these options. Press the FAN DOWN button in order to bypass the DTC display.
On the OBD II cars, the prefixes you'll see are: "IP" for the IPC instrument panel; "AC" for air conditioning module; "TC" for traction control; "RS" for the road suspension system; "SD" for the air bags; "PZ" for the body control module; "CC" for the cell phone; "RF" for the integrated radio system.

To exit the diagnostic mode anytime during the test, depress the "ECON" or "DEFOG" button, or turn the ignition switch "OFF."

Write down the list of trouble codes and report back here.

Sep 20, 2009 | 1999 Cadillac DeVille

1 Answer

1997 DeVille will stop as if key was turned off at random times. If leads to coil pack base are disconnected and re-attached it will start and may go two blocks or 2000 miles before doing it again.


Run a diagnostic check to extract the trouble codes,then post the results back here.

To enter diagnostic mode, proceed as follows:
  1. Turn ignition "ON." Engine can be either OFF or RUNNING. For cars equipped with the Digital Instrument Panel Display (Digital IPC):
  2. Simultaneously press the "OFF and "WARMER" (red) buttons on climate control center (CCC) until all display segments (IPC and CCP) are illuminated For cars equipped with the Analog Instrument Panel Display (Analog IPC):
  3. Simultaneously press on the Climate Control Panel (CCP) the "OFF" and "PASS WARMER" (up arrow) buttons.
After the segment display test, the driver message center displays all set trouble codes, current and history, in the following order:
  1. PCM DTC
  2. IPC DTC
  3. ACM DTC
  4. SDM DTC
  5. TCS DTC
  6. PZM DTC
  7. IRC DTC
  8. RFA DTC
  9. CCP DTC
  10. MSM DTC
  11. MMM DTC
  12. PHN DTC
  13. The RSS, CCP, MSM, MMM and PHN DTC appear only on vehicles equipped with these options. Press the FAN DOWN button in order to bypass the DTC display.
On the OBD II cars, the prefixes you'll see are: "IP" for the IPC instrument panel; "AC" for air conditioning module; "TC" for traction control; "RS" for the road suspension system; "SD" for the air bags; "PZ" for the body control module; "CC" for the cell phone; "RF" for the integrated radio system.

To exit the diagnostic mode anytime during the test, depress the "ECON" or "DEFOG" button, or turn the ignition switch "OFF."

Write down the list of codes and report back here.

Sep 19, 2009 | Cadillac DeVille Cars & Trucks

2 Answers

I have 3 ipc codes what does ipc stand for 98 cadillac eldorado


IPC stands for Instrument panel control, here is a typical code repair flow chart, this is for example only and has nothing to do with your car..
P083 = 24x signal high.

P107 = Instrument panel control )IPC) to computer (PCM) data problem.

P137 = Loss of Automatic braking system (ABS) to Traction control system (TCS).

What you need to do is CLEAR all these codes from the computer and see which ones return.

Perform this test.

1. Ignition key ON. Engine OFF.

2. Simultaneously push and hold the OFF and WARMER (^) buttons on your climate control panel for 3 seconds and release them.

3. Diagnostic codes such as above will appear with the word HISTORY or CURRENT for each code.

4. The codes will stop when you see PCM?

5. Push and release the HI(^) button and you will see PCM DATA?

6. Push and release the LO(v) button and you will see PCM DATA?

7. Continue to push and release the LO (v) button until you see PCM CLEAR CODES?

8. Push and release the HI(^) button until you see PCM CODES CLEAR.

9. Turn OFF the ignition and wait 3 minutes and try and start the car. If the car starts and the light comes back ON, Turn OFF the car and repeat steps 1 thru 3 and let me know what codes you get and if they are HISTORY or CURRENT.

10. When you see PCM?, Turn OFF ignition key.

11. Let me know what codes you get and if they are HISTORY or CURRENT.



---------- FOLLOW-UP ----------

QUESTION: this is what happen when it did what you told me what to do.
P047 History,P107 History,No IPC Code, P83 History,P137 History, A047 Current, No Sir Codes, T072 History,No Russ, PCM?
ANSWER: You did not follow the directives correctly . If you had, You would NOT have any HISTORY CODES.

Try it again and follow these directives EXACTLY:

1. Ignition key ON. Engine OFF.

2. Simultaneously push and hold the OFF and WARMER (^) buttons on your climate control panel for 3 seconds and release them.

3. Diagnostic codes such as above will appear with the word HISTORY or CURRENT for each code.

4. The codes will stop when you see PCM?

5. Push and release the HI(^) button and you will see PCM DATA?

6. Push and release the LO(v) button and you will see PCM DATA?

7. Continue to push and release the LO (v) button until you see PCM CLEAR CODES?

8. Push and release the HI(^) button until you see PCM CODES CLEAR. WAIT 3 seconds and then proceed to 9.

9. Turn OFF the ignition and wait 3 minutes and try and start the car. If the car starts and the light comes back ON, Turn OFF the car and repeat steps 1 thru 3 and let me know what codes you get and if they are HISTORY or CURRENT.

10. When you see PCM?, Turn OFF ignition key.

Aug 14, 2009 | 1998 Cadillac Eldorado

1 Answer

I have a 1993 park ave and need to now how to reset the transmiss


if you got climate control air conditioner control buttons turn on ignition key enter the self diagnostic system. select pcm override ps13 tps sensor learn.press the warmer button. the driver information center should display 09.indicating that the garage shift value has been reset.select pcm override ps14 tran adapt.press the cooler button the dic should display90 indicating the up shift adapt value been reset.press warmer button the dic should display 09 indicating the steady state adapt value has been reset. press and hold the off and rear defog buttons on dic until the message .transaxle oil life reset is displayed on the dic.

Apr 11, 2009 | 1993 Buick Park Avenue

1 Answer

What do these codes mean on 1994 Cadillac Eldorado -A012 and A047


Sound like you have a bad cv "constant velocity joint " REPLACE.

The first thing you need to do is to clear your old codes then drive

and see if they come back .

1. Re-enter back into the climate control panel and after all the codes display the display will stop at PCM?

2. Push and release the FAN UP (^) button on the climate control panel and you will see PCM DATA?

3. Keep pushing and releasing the FAN DOWN (v) button until you see PCM CLEAR CODES?

4. Push and release the FAN UP (^) button and you will see PCM CODES CLEAR?

5. Wait 5 seconds and then keep pushing the OFF button until you see PCM?

6. Push and release the FAN DOWN (v) button and you will see IPC?

7. Push and release the FAN UP (^) button on the climate control panel and you will see IPC DATA?

8. Keep pushing and releasing the FAN DOWN (v) button until you see IPC CLEAR CODES?

9. Push and release the FAN UP (^) button and you will see IPC CODES CLEAR?

10. Wait 5 seconds and then keep pushing the OFF button until you see PCM?

11. keep Pushing and releasing the FAN DOWN (v) button and you will see ACP?

12. Push and release the FAN UP (^) button on the climate control panel and you will see ACP DATA?

13. Keep pushing and releasing the FAN DOWN (v) button until you see ACP CLEAR CODES?

14.Push and release the FAN UP (^) button and you will see ACP CODES CLEAR?

15. Wait 5 seconds and then keep pushing the OFF button until you see PCM?

16. keep Pushing and releasing the FAN DOWN (v) button and you will see SIR?

17. Push and release the FAN UP (^) button on the climate control panel and you will see SIR DATA?

18. Keep pushing and releasing the FAN DOWN (v) button until you see SIR CLEAR CODES?

19. Push and release the FAN UP (^) button and you will see SIR CODES CLEAR?

20. Wait 5 seconds and then keep pushing the OFF button until you see PCM?


21. Push the AUTO button to get out of diagnostics.

22. Turn ignition OFF for 15 seconds.

23. Re-enter diagnostics and see if any history codes re-appear.



Mar 27, 2009 | 1994 Cadillac Eldorado

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