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My check light engine is on with code p0138 for mazda3 2010 what does it mean

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  • 243 Answers

Rear oxygen sensor

Posted on Apr 14, 2015

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Posted on Jan 02, 2017

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thutson66
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SOURCE: my check engine light is on and the default code is P0138

What kind of vehicle? I may have the book here.

Posted on Aug 01, 2008

  • 1915 Answers

SOURCE: I have a check engine alarm on my '96 honda civic

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

Posted on Feb 10, 2011

ZJLimited
  • 17970 Answers

SOURCE: 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.

Posted on Jul 06, 2012

nicole99wu
  • 1049 Answers

SOURCE: check engine light on codes p0138 and p0139

Hi, guys. you can read this article first. Why check engine light is on. Maybe it is able to help you. Good luck.

Posted on Aug 27, 2012

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What do these codes together mean? p0300 p0138 p0339 p0871 p0700


GO TO YOUR LOCAL PARTS STORE, ADVANCE AUTO, ETC., HAVE THEM PULL THE CODES STORED IN THE ECM, THEY CAN TELL U WHAT THEY R

Apr 29, 2014 | 2002 Chrysler 300M

1 Answer

P0136 & p0138


I would replace the engine thermostat and clear the codes and drive it for a few days. P0136 is engine does not reach operating temperature

Mar 20, 2014 | Cars & Trucks

1 Answer

P0138 01 code


p0138 - oxygen sensor circuit high voltage.
need to check or replace O2 sensor

Sep 21, 2012 | 2006 Jeep Liberty

1 Answer

Check engine light on codes p0138 and p0139


Hi, guys. you can read this article first. Why check engine light is on. Maybe it is able to help you. Good luck.

Aug 27, 2012 | Infiniti M45 2003 2005 If 51 02 Vehicle...

1 Answer

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

2 Answers

Hi there i have 1997 Avalon V6 . the check engine light up # 138 and 401 so can you tell me the name of that two please thnks


Trouble codes are normaly 4 digits with a "P" or "B" before it. I am gonna assume that you meant P0138 and P0401:
P0138 is Oxygen Sensor Circuit High Voltage (Bank 1, Sensor 2)
P0401 is Exhaust Gas Recirculation Flow Insufficient Detected

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
for info on the P0401:
http://www.obd-codes.com/p0401

Jul 10, 2011 | 1997 Toyota Avalon

1 Answer

I have a 2001 Dodge 2500 4wd,, gas engine,, codes p0138 and p0455 come up,,what do they mean. Thanks


P0455....Evaporative Emission Control System Leak Detected (gross leak)


P0138....O2 Sensor Circuit High Voltage (Bank 1 Sensor 2)

Jan 13, 2011 | 2001 Dodge Ram 2500 Truck

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

1 Answer

My check engine light is on and the default code is P0138


What kind of vehicle? I may have the book here.

Aug 01, 2008 | 2000 Dodge Durango

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