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Pcm code po139 eldorado - Cars & Trucks

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P0139: O2 Sensor CKT Slow Response (Bank 1 Sensor 2)

- Rear Heated Oxygen Sensor Bank 1 harness is open or shorted
- Rear Heated Oxygen Sensor Bank 1 circuit poor electrical connection
- Faulty Rear Heated Oxygen Sensor Bank 1
- Inappropriate fuel pressure
- Faulty fuel injectors
- Intake air leaks may be faulty
- Exhaust gas leaks

Posted on Feb 07, 2012

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I have a 2000 plymouth neon the codes show up as po139 po140 po141 were are they located and what am i buying


all refer to the o2 sensor right hand side ,clear the codes and see if they come back as sometimes the OBD detects a random signal and stores it even though there is nothing wrong, if the codes come back then check the wiring from the PCM to the o2 sensor as is likely to be a worn/melted wire as the last 2 codes refer to a short in that circuit ,the first is the sensor its self but the wire problem would throw this code up as well ,this is really a repair shop job as would need to get under vehicle to inspect some of the wiring etc

May 09, 2014 | 2000 Plymouth Neon

1 Answer

2005 ACCORD ERROR CODE P0139


po139 is a code for o2 sensor slow response bank 1 sensor2 which tells me you have a v6 engine and this sensor is located after the catalytic converter on the side of the engine that the #1 cylinder is on.

Sep 11, 2012 | 2005 Honda Accord

1 Answer

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

Jun 15, 2012 | Cars & Trucks

1 Answer

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

1 Answer

My 1995 Eldorado ETC will shut down (intermittent) at idle. All electrical power stops. Car does restart in after a couple of minutes. Battery cables are clean and tight.


You will need to find the codes that the car is getting. You can do this by entering diagnostics on the dash.
1. Turn the ignition switch ON. [Bruce notes: interestingly, the engine can be on or off]
2. On the cars up to 1995, on the Climate Control panel, press the OFF and WARM buttons simultaneously.
  • E -- ECM trouble code
  • P -- PCM trouble code
  • C -- Current trouble code
  • H -- History trouble code
  • NO X CODE -- No code present (X represents the system)
  • NO X DATA -- Communication lines are not operating (X represents the system)

Nov 12, 2010 | 1995 Cadillac Eldorado

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

Check engine light came on. codes po52,po85,1039,1052,no acp,no sir,pcm?


CODE PO52 IS FAULTY OR MISSING CAL PAC -MEM CAL CODE PO85 IS IDLE LEARN MAX THROTTLE POSITION. .I DID NOT FIND - 1039 AND 1052 SORRY.BUT I HOPE THIS COULD BE SOME HELP.

Jul 13, 2009 | 1994 Cadillac Eldorado

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

1 Answer

Trouble codes


Trouble Code: P0139
O2 (B1 S2) Slow Response
Trouble Code Conditions:Engine started; vehicle driven at 20-55 mph with the throttle open for 2 minutes; ECT at more than 158ºF (70C); catalytic converter temperature is more than 1112F (600C); and EVAP purge is active. O2 Sensor signal voltage switches less than 16 times from lean to rich within 20 seconds during monitoring, or will compare the state of change between the front and rear O2 Sensors and if the differences are greater than a calibrated amount, the DTC will set. 3 good trips are required to turn off the MIL.
Possible Causes:
  • Exhaust leak
  • O2 element is contaminated, deteriorated or it has failed
  • O2 signal circuit or return circuit has failed

Trouble Code: P0344
Camshaft Position Sensor Circuit Intermittent
Trouble Code Conditions:Engine cranking or running; system voltage over 10.5v. The PCM detected an intermittent loss of the CMP Sensor signal during the period of 2.5 complete engine revolutions. The failure counter must reach 20 before this code matures and a code is set.
Possible Causes:
  • Wiring harness fault
  • 5v supply circuit open or shorted to ground
  • Tone wheel/pulse ring is damaged or corroded
  • CMP Sensor has failed
  • CMP Sensor signal circuit is open, shorted to ground or battery voltage or 5v supply
  • CMP Sensor ground circuit is open
  • PCM has failed
  • Trouble Code: P0340
    No Camshaft Position Sensor Circuit Failure
    Trouble Code Conditions:Engine cranking or running, system voltage over 10v. The PCM detected CKP pulses without detecting any CMP Sensor pulses for 5 seconds or 2.5 engine revolutions.
    Possible Causes:
  • CMP Sensor connector is damaged, open or it is shorted
  • CMP Sensor signal circuit is open or shorted to ground or to battery voltage or 5v supply circuit
  • CMP Sensor 5v supply circuit is open or shorted to ground or to battery voltage
  • CMP Sensor ground circuit is open
  • CMP Sensor is damaged or has failed
  • CKP Sensor is damaged or has failed
  • PCM has failed
Good luck....

Nov 05, 2008 | 2005 Chrysler PT Cruiser

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