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Author Topic: P0139  (Read 1469 times)

TheDonut

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P0139
« on: January 27, 2026, 05:25:36 PM »
Hi all , got the code P0139 come up with the check system light on.
I've checked fuel cap , all fine .
Would it be a sensor on the cat?
If so is it diyable?

Cheers

Donut 👍
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Keekster71

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Re: P0139
« Reply #1 on: January 28, 2026, 01:35:35 PM »
According to Google its the second lambda sensor for the cat.  Could be faulty, or could be a broken wire, or could be an exhaust leak.
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We live on a placid island of ignorance in the midst of black seas of infinity, and it was never meant that we should venture far." H P Lovecraft

TheDonut

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Re: P0139
« Reply #2 on: February 06, 2026, 09:07:59 PM »
Thanks for the reply and sorry for the late response, been hectic at work recently.
Think I'll book into garage as need brakes doing anyway.

Thanks again.

Donut  :-)
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