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13/04/2021 10:21 am
Topic starter
Hello guys! I recently got this code on my Honda in addition to he p0420, and I looked it up and it was the 02 sensor. Is there any way I can tell which it is? I wanted to ask you guys before I went to shop and they charge me some price just to tell me which it is
1 Answer
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13/04/2021 10:27 am
P0139 is referring to the Bank1 02 sensor that comes after the catalytic converter.
See below (includes video on diagnosis):
https://www.carparts.com/blog/p0139-code-o2-sensor-circuit-slow-response-bank-1-sensor-2/amp/
