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P0138 and p2195

Cel lights came on. took to mechanic adn it was found that the rear o2 sensor would read 0 volts at start up and only begin to vary in its reading after warming up for about 5 minutes. the wiring to the rear sensor was checked for continuity and shorts or opens and found to be in good condition. a new rear 02 sensor was purchased from toyota and installed. the new sensor showed the same excessive warm up tine and the two codes came back shortly after they were cleared.

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6ya6ya
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Posted on Jan 02, 2017

  • 158 Answers

SOURCE: Car Idles Hot Temp

I don't know how the above could have any effect on temperature. Is the vehicle full of coolant? In my opinion you have two different issues

Posted on Apr 03, 2009

ghost45
  • 1280 Answers

SOURCE: 01 accent gl 1.6 liter auto,air ;engine lite

P0342 is set when the ECM does NOT receive a signal from the CMP snsr. You may very well have GOOD continuity between the ECM and pin 2 (000.2 ohms), but that wire, if grounded someplace (shorted to ground or to another wire in the harness), the ECM will not/does not get a clear/proper signal. Look for a problem in the wiring harness.

Posted on Sep 07, 2009

  • 753 Answers

SOURCE: i have a 2003 impala and its reading 5 volt

all your sensors run off the 5 volt ref. so you will have to trace your wiring harness from the pcm\ecm all the way out under the hood to locate the broken or pinched wire.

Posted on Feb 26, 2010

countrybo331
  • 79 Answers

SOURCE: engine light stays on after changing 02 sensor on

did u change the right o2 sensor there is 2 sensors on bank1 and 2 on bank2.....upstream and down stream.....i had the same prob i changed the o2 senser to the other side to check and make sure it was the o2 senser....it took 4 o2 sensors before i got 1 that finally worked nd yes i was buying them brand new.....so change sides with it nd see if the code changes sides....and did u reset it with the code machine when u put the new 1 in?

Posted on Mar 28, 2010

Testimonial: "i wont no if this is a successful answer until i can reset the code thank you"

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SOURCE: My 1998 Dodge Dakota V6

you have a clogged catalytic converter, it has been recallled for this call the dealer

Posted on Oct 23, 2010

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1996 GRAND CHEROKEE CODE #P0141 AND P0138


Hi there:
Both codes refer at O2 sensor...


DTC P0141 - O2 Sensor Heater Circuit Malfunction (Bank 1, Sensor 2)
This code means that the heated circuit in the oxygen sensor on bank 1 decreases time needed to enter closed loop. As the O2 heater reaches operating temperature, the oxygen sensor responds by switching according to oxygen content of the exhaust surrounding it. The ECM tracks how long it takes for the oxygen sensor to begin switching. It the ECM determines (based on coolant temp) that too much time elapsed before the oxygen sensor began operating properly, it will set P0141. See also: P0135 (Bank 1, Sensor 1).



You will likely notice poor fuel economy the illumination of the Check Engine Light.



A code P0141 may mean that one or more of the following has happened:
open or short to ground in the wiring harness
O2 heater circuit wiring high resistance
O2 heater element resistance is high
Internal short or open in the heater element
Note: Typically a failed catalytic converter does not cause this code. You're more likely to see a P0420 code for a failed converter.


Possible Solutions:
Replace oxygen sensor (cannot repair open or short that occurs internally to sensor)
Repair short or open or high resistance in wiring harness or harness connectors





DTC P0138 - O2 Oxygen Sensor Circuit High Voltage (Bank1, Sensor2)
The Heated Oxygen Sensor (2) located rear of catalytic converter produces an output signal relative to oxygen storage capacity of catalytic converter. Ho2S 2 signal is less active than signal produced by front oxygen sensor. This code sets when HO2 Sensor voltage is greater than 999 mV for more than 2 minutes (time depends on model. Could be as high as 4 minutes)



There may be no noticeable symptoms except for MIL illumination. Possible high fuel pressure can over rich the system.


A code P0138 may mean that one or more of the following has happened:
Faulty O2 sensor
Short to battery voltage in O2 sensor signal circuit
High fuel pressure (not as likely)


Here are some potential solutions:
Replace O2 sensor
Repair short to battery voltage in o2 sensor signal circuit.


Hope this helps; also keep in mind that your feedback is important and I'll appreciate your time and consideration if you leave some testimonial comment about this answer.

Thank you for using Fixya, and have a nice day.

Jul 06, 2012 | 1996 Jeep Grand Cherokee

1 Answer

2003 jeep liberty p0138


P0138 CHRYSLER - O2 sensor 1/2 Circuit high
Symptoms - Engine Light ON (or Service Engine Soon Warning Light)
- High Fuel Consumption
- Excessive Smoke from Exhaust Possible causes - 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

Jan 27, 2012 | 2003 Jeep Liberty

1 Answer

I have a code po156 what is this


Causes

Potential causes of an P0156 code include:

  • Bad O2 sensor
  • Signal shorted to voltage
  • Wiring problems due to contact with exhaust components
  • Holes in exhaust near o2 sensor
Possible Solutions

If you have access to a scan tool, check the signal voltage for the Bank 2,2 oxygen sensor with the engine at normal operating temperature. Is it stuck low currently? If so, increase RPM for a few seconds and see if it affects the reading. If it begins working with increased RPM, check for holes in the exhaust near the o2 sensor that may cause a false lean. If the exhaust pipe is intact, the sensor is sluggish, replace it.

If the Bank 2,2 o2 sensor voltage reading remains low with increased RPM, unplug it and then observe the reading. It should have increased to about 0.5 volts or thereabouts. If it did, check for water intrusion or other connector problems. If none are found, replace the shorted o2 sensor. If the voltage reading is still stuck low after unplugging the sensor, then suspect a wiring problem. Using a voltmeter, with the o2 sensor unplugged, check for voltage on the signal circuit at the o2 sensor connector(PCM side). It can vary with model, but should be about 0.5 volts and not above 1 volt. If the voltage reading is too high, repair short to voltage on signal circuit. If the signal voltage checks out, suspect the PCM.

Aug 16, 2011 | 2001 Dodge Stratus

1 Answer

What do i have to change if codes po1151 and po155 come up on my 1999 lincoln town car?


P0155 - 02 Sensor Heater Circuit Malfunction (Bank 2 Sensor 1)
This code refers to the front oxygen sensor on Bank 2. The heated circuit in the oxygen sensor decreases time needed to enter closed loop. As the O2 heater reaches operating temperature, the oxygen sensor responds by switching according to oxygen content of the exhaust surrounding it. The ECM tracks how long it takes for the oxygen sensor to begin switching. It the ECM determines (based on coolant temp) that too much time elapsed before the oxygen sensor began operating properly, it will set P0155. See also: P0135 (Bank 1).

Potential Symptoms: You will likely notice poor fuel economy the illumination of the MIL.

Causes: A code P0155 may mean that one or more of the following has happened:
O2 Heater element resistance is high
Internal short or open in the heater element
O2 heater circuit wiring high resistance
open or short to ground in the wiring harness

Possible Solutions:
Repair short or open or high resistance in wiring harness or harness connectors
Replace oxygen sensor (cannot repair open or short that occurs internally to sensor)



P0156 - 02 Sensor Circuit Malfunction (Bank 2 Sensor 2)
The o2 (oxygen) sensors measure oxygen content in the exhaust. The PCM (powertrain control module) then uses this information to regulate fuel injector pulse. The o2 sensors are very important for the proper operation of the engine. Innacurate or faulty o2 sensors can cause the PCM to add or take away fuel based on the faulty o2 sensor voltage which can cause a host of problems.

A P0156 code refers to the Bank 2,2 o2 sensor or the downstream (post-cat) o2 sensor on Bank 2. It is a four wire sensor. The PCM supplies a ground circuit and a reference voltage circuit of about 0.5 volts. Also for the o2 sensor heater element there is a battery voltage supply wire and another ground circuit for that. The o2 sensor heater allows the o2 sensor to warm up faster, thus achieving closed loop in less time than it would normally take for the exhaust to warm the sensor up to operating temperature. The O2 sensor varies the supplied reference voltage based on oxygen content in the exhaust. It is capable of varying from about 0.1 to 0.9 volts, 0.1 V indicating lean exhaust and 0.9 V indicating rich exhaust. This P0156 code indicates that the Bank 2, 2 o2 sensor is stuck low for too long or isn\'t active at all.

Symptoms: Often post-cat o2 sensor problems present few symptoms since they are inputs to the PCM to monitor catalytic converter quality and don\'t directly control fuel. sometimes no symptoms are noticeable. However the following may be possible on some vehicles:
MIL (Malfunction Indicator Lamp) illumination
Decrease in MPG
Increase in tailpipe emissions

Causes: Potential causes of an P0156 code include:
Bad O2 sensor
Signal shorted to voltage
Wiring problems due to contact with exhaust components
Holes in exhaust near o2 sensor

Possible Solutions:
If you have access to a scan tool, check the signal voltage for the Bank 2,2 oxygen sensor with the engine at normal operating temperature. Is it stuck low currently? If so, increase RPM for a few seconds and see if it affects the reading. If it begins working with increased RPM, check for holes in the exhaust near the o2 sensor that may cause a false lean. If the exhaust pipe is intact, the sensor is sluggish, replace it.

If the Bank 2,2 o2 sensor voltage reading remains low with increased RPM, unplug it and then observe the reading. It should have increased to about 0.5 volts or thereabouts. If it did, check for water intrusion or other connector problems. If none are found, replace the shorted o2 sensor. If the voltage reading is still stuck low after unplugging the sensor, then suspect a wiring problem. Using a voltmeter, with the o2 sensor unplugged, check for voltage on the signal circuit at the o2 sensor connector(PCM side). It can vary with model, but should be about 0.5 volts and not above 1 volt. If the voltage reading is too high, repair short to voltage on signal circuit. If the signal voltage checks out, suspect the PCM.


Hope this helps (remember to rate this answer).

Jun 06, 2011 | Lincoln Town Car Cars & Trucks

2 Answers

2004 sebring 2.4 x engine running rough black ritch exhaust no power code po138 po117 now wont start flooded bad just kicks


The code description for Diagnostic Trouble Code (DTC) P0138 is "Oxygen Sensor Bank 1 Sensor 2 shorted to voltage" The oxygen sensor (O2S) voltage should always be between 0 and 1 volt. This code sets when the O2S voltage is greater than 1.2 volts for at least 30 seconds.

The code description for code P0117 is "Engine Coolant Temperature Sensor (ECT)Voltage Low". The ECT is a thermal variable resistor. The Powertrain Control Module (PCM) sends a 5 volt reference to the ECT and measures how much of this voltage returns to the PCM to determine engine temperature. This code sets when the ECT voltage signal is less than 1 volt.

Here's the kicker...which came first, P0117 or P0138? Low ECT voltage can cause the engine to run extremely rich and cause the O2S voltage to go high. This needs to be looked at with a scanner that can display the actual ECT and O2S voltages so they can be compared.

I would say that with the symptoms you are describing along with these codes, there is a GOOD chance that you have some kind of wiring harness damage or water in a connector that is shorting these two circuits together. This would definitely RAISE the voltage on the O2S circuit that is supposed to be low, and LOWER the ECT voltage that is supposed to be high.

May 19, 2011 | 2004 Chrysler Sebring

2 Answers

My 97 ford f150 is loafing an when i put on a diagnostics test its reading out 02 sensors an i change all four and i also change the massive airflow sensor, and i also had the fuel system cleaned and its...


If it's still reading 02 sensors and you replaced them AND assuming you cleared codes I suspect bad cat, converters, The 02 sensors when everything is operating properly, the front 02 sensors read different from rear ones - if they read the same, you get code/light. Plus with your description sounds like bad converter(s)

Mar 23, 2011 | 1997 Ford F150 Regular Cab

3 Answers

P0138 code


P0138 - O2 Oxygen Sensor Circuit High Voltage (Bank1, Sensor2)

The Heated Oxygen Sensor (2) located rear of catalytic converter produces an output signal relative to oxygen storage capacity of catalytic converter. Ho2S 2 signal is less active than signal produced by front oxygen sensor. This code sets when HO2 Sensor voltage is greater than 999 mV for more than 2 minutes (time depends on model. Could be as high as 4 minutes)

Symptoms: There may be no noticeable symptoms except for MIL illumination. Possible high fuel pressure can over rich the system.

Causes: A code P0138 may mean that one or more of the following has happened:
* Faulty O2 sensor
* Short to battery voltage in O2 sensor signal circuit
* High fuel pressure (not as likely)

Possible Solutions: Here are some potential solutions:
* Replace O2 sensor
* Repair short to battery voltage in o2 sensor signal circuit

Hope helps (remember to rate and comment this).

Sep 15, 2010 | 2002 Jeep Grand Cherokee

2 Answers

P0138 02 circunit high voltage sensor 2 red light


The Heated Oxygen Sensor (2) located rear of catalytic converter produces an output signal relative to oxygen storage capacity of catalytic converter. Ho2S 2 signal is less active than signal produced by front oxygen sensor. This code sets when HO2 Sensor voltage is greater than 999 mV for more than 2 minutes (time depends on model. Could be as high as 4 minutes)
FB.init("dd7d9e9681341cde77587bc6a2029f6f"); OBD-Codes.com on Facebookcopyscape.gif Symptoms There may be no noticeable symptoms except for MIL illumination. Possible high fuel pressure can over rich the system.
Causes A code P0138 may mean that one or more of the following has happened:
  • Faulty O2 sensor
  • Short to battery voltage in O2 sensor signal circuit
  • High fuel pressure (not as likely)
Possible Solutions Here are some potential solutions:
  • Replace O2 sensor
  • Repair short to battery voltage in o2 sensor signal circuit

Dec 20, 2009 | 1993 Jeep Grand Cherokee

2 Answers

Brand new O2's Same volt readings and CEL codes


check your air/fuel mixture. if you have a leak especially at your intake or injectors, it is taking in air, causing a lean air/fuel ratio which will make your o2 sensors out of wack. Also, if your injectors are leaking or your fuel pressure is low. Try checking these things to determine why your o2 sensors are low.

Jul 09, 2009 | 1997 Honda Civic

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