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Pcm code po139 eldorado

The PCM code PO139 current keeps coming up when I use Regular gas in my northstar

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

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Ajkill
  • 2035 Answers

SOURCE: 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....

Posted on Nov 05, 2008

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SOURCE: Check Engine Light Code

If you have a PCM problem it will be covered under the 8yr fed warranty if you have under 80,000 miles. Take it to a dealer

Posted on Nov 07, 2008

pkthoege
  • 93 Answers

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

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

emissionwiz
  • 76630 Answers

SOURCE: PCM unit

PCM is the standard automotive acronym for Powertrain Control Module, previously know as the ECM and ECU, in 1996 the term was standardized for the new OBD 2 emission control system.

Posted on Apr 29, 2009

seans46
  • 161 Answers

SOURCE: 1999 pcm problem

I am not sure I understand your problem but I assume the truck is not running , no power to pcm ect. I have had jeeps sent to me after thousands of dollars have been pured into them and still wouldnt start. Change the CRANK SENSOR. This will 99% of the time fix this problem. When you go to the part store just make sure to give them the correct info. it is located on top of the transmission bell housing and is held in by 1 bolt most of the time it is a 10mm bolt . it is sometimes a pain but its on the drivers side top of bell housing . look at the new one to get idea of what it is. follow wire harness and unplug then take bolt out and remove sometimes you have to twist and pull out. put the new one in put bolt back and plug in. if it has a piece of felt on the tip leave it on it will come off its self . jeeps have a lot of pcm problems but the crank sensor can fool even the best mechanics making it look like a pcm problem. I take it you have not changed pcm's. if you do it will have to go to dealer to be programed and flashed in order to stay running. but hpoefully you havent changed pcm yet and go ahead and change that crank sensor asap

Posted on May 24, 2009

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2 Answers

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

2002 mercury villager code po325 code po138 code po139


P0138 O2 Sensor Circuit High Voltage (Bank 1 Sensor 2)
P0139 O2 Sensor Circuit Slow Response (Bank 1 Sensor 2)
P0325 Knock Sensor 1 Circuit (Bank 1 or Single Sensor) -Circuit Malfunction
think you just need a new o2 sensor

Nov 03, 2013 | Cars & Trucks

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

Pcm code po139 eldorado


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

Feb 07, 2012 | 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

MIL on


Actually the PO139 is Downstream O2 sensor slow to respond, And PO400 is EGR flow malfunction. But any why it sounds like the problem is in the exhaust system. I would start by checking the EGR valve first. Make sure the vacuum is operating it properly. If it is not that would make the O2 sensor slow to read or give the emissions system problems with oxygen readings. Good luck and have a good day.

Mar 28, 2009 | 1998 Subaru Legacy

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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