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Oxygen Sensor Location, codes P0031, P0037, P0138 and P1613

Tiny
JOHN OGAR
  • MEMBER
  • 2008 TOYOTA LAND CRUISER PRADO
  • 4 CYL
  • 4WD
  • AUTOMATIC
  • 116,452 MILES
My vehicle listed above is the GX model. It has been giving check engine sign and when I ran diagnostics on it, it shows O2 sensor B1S1 and B1S2 with error codes: P0031, P0037 and P0138; and also shows Secondary Air Injection System Driver (P1613).

The funny thing is: I haven't been able to locate the oxygen sensors on my car exhaust.

Please show me where to locate oxygen sensors on this model, and how the sensors can be replaced.
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Saturday, October 5th, 2019 AT 7:59 AM

3 Replies

Tiny
DANNY L
  • MECHANIC
  • 5,648 POSTS
Hello, I'm Danny.

Here is a tutorial for you to view on how to remove/replace an 02 sensor:

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

I've attached pictures below showing the location on your vehicle.Hope this helps and thanks for using 2CarPros.

Danny-
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Saturday, October 5th, 2019 AT 4:27 PM
Tiny
JOHN OGAR
  • MEMBER
  • 2 POSTS
Hello Danny, thanks for the answer you gave. However, my model of Prado is not the one shown in the picture. My Prado model is 04/2008 TOYOTA LAND CRUISER PRADO (TRJ120L-GKPEK) as follows: GX GEN LHD 2TRFE ATM 4FC 5D.
I will appreciate if you can help with pictures of specific to this model of Prado.
Thanks.
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Wednesday, October 16th, 2019 AT 6:06 PM
Tiny
DANNY L
  • MECHANIC
  • 5,648 POSTS
Hello again.

I've attached pictures below of the H02 sensors. The first picture is right side and the second picture is left side. I've circled the sensor locations in red. Hope this helps and thanks again for using 2CarPros.

Danny-
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Thursday, October 17th, 2019 AT 6:12 PM

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