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I have a error code 02 sensor circuit low voltage (bank 1, Sensor 2)

Tiny
LUIS SEGOVIANO
  • MEMBER
  • 2018 CHEVROLET MALIBU
  • 1.6L
  • 4 CYL
  • TURBO
  • 2WD
  • AUTOMATIC
  • 50,000 MILES
I am having problems with locating the 02 sensors on my car. I have a error code 02 sensor circuit low voltage (bank 1, Sensor 2).
Friday, July 23rd, 2021 AT 2:01 PM

11 Replies

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Good afternoon,

I attached the location of both sensors. I circled the downstream or sensor 2 location.

https://www.2carpros.com/articles/how-an-oxygen-sensor-works

https://www.2carpros.com/articles/how-to-replace-an-oxygen-sensor

Let me know if you have any other questions.

Roy
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Friday, July 23rd, 2021 AT 2:26 PM
Tiny
LUIS SEGOVIANO
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Thank very much. I understand what to do. But I have a problem. I have a cheap code reader from Walmart. Hyper Tough HT309 is the model number. I'm not sure I can do reset with it. Is there any other way to do a h02s heater learned reset?
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Friday, July 23rd, 2021 AT 3:18 PM
Tiny
ASEMASTER6371
  • MECHANIC
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Good evening,

There is no such thing as a learned reset. There should be an option for resetting the code after you perform repairs.

Your scan tool does reset codes. I attached the description for you. Read the user manual that came with the tool.

https://www.2carpros.com/articles/check-engine-light-clear-codes

Roy
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Friday, July 23rd, 2021 AT 3:41 PM
Tiny
LUIS SEGOVIANO
  • MEMBER
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I did repairs and reset the code. Everything is working fine. Thank you very much Roy. Really good information an very helpful.
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Friday, July 23rd, 2021 AT 5:07 PM
Tiny
ASEMASTER6371
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You are welcome.

Always glad to help.

Roy
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Friday, July 23rd, 2021 AT 5:08 PM
Tiny
LUIS SEGOVIANO
  • MEMBER
  • 12 POSTS
So today my car had the same issue code p0137. I had changed the 02 sensor yesterday an car ran fine. After driving the car for 6 hours the code came back an car stalled on me. Brought car back home changed the 02 sensor again an car ran fine again until today after 8 hours of driving. So I know that my issue is the 02 sensor bank 2. What other issue can cause this problem were the car runs fine but after 8 hours its giving me the same issue?
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Saturday, July 24th, 2021 AT 2:10 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Okay, first, the O2 sensor will not cause stalling. The only job for that sensor is to monitor the cat converter and has nothing to do with fuel control.

https://www.2carpros.com/articles/stall-at-idle

I would start with cleaning the throttle body as carbon build-up will cause it to stall.

https://www.2carpros.com/articles/throttle-actuator-service

Roy
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Saturday, July 24th, 2021 AT 4:18 PM
Tiny
LUIS SEGOVIANO
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I have replaced the Throttle Body Unit with a new one the same day I replaced the 02 sensors.
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Saturday, July 24th, 2021 AT 4:43 PM
Tiny
ASEMASTER6371
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Okay, then it could be a loss of spark from a crank sensor dropping out. I attached the location for you and the procedure. If you replace it there is a relearn that must be done after the repair.

https://www.2carpros.com/articles/how-a-crank-shaft-angle-sensor-works

https://www.2carpros.com/articles/symptoms-of-a-bad-crankshaft-sensor

https://www.2carpros.com/articles/crankshaft-angle-sensor-replacement

Roy
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Saturday, July 24th, 2021 AT 5:12 PM
Tiny
LUIS SEGOVIANO
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Can you please tell me the location of the Idle air control valve?
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Monday, July 26th, 2021 AT 8:11 PM
Tiny
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Okay, the idle air control is part of the throttle body. There is no valve like the older models. The throttle body controls all idle functions.

https://www.2carpros.com/articles/throttle-actuator-service

Roy
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Monday, July 26th, 2021 AT 8:16 PM

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