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P1275 & P0139 - 02 sensors ageing behind cat, bank 1

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YOUR RESEARCHP1275 & P0139 - 02 sensors ageing behind cat, bank 1

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POST 1 / ORIGINAL POSTEROriginal post

Edit: Is sensor 2 post-cat / downstream? Trying to buy a new one. Looks to be a bank 1 sensor 2 issue (post-cat). That sensor consistently puts out around .085V. The other sensors hover around .7V, except for bank 2 sensor 2 - that one seems to hover on the lower end around .1 - .4 V (I think that's normal...). I believe sensor 2 is post-cat and therefore not as big of a deal as sensor 1. I'm not sure - hopefully someone who knows the codes could clarify? I also have codes 58 and 60 - both point to the alarm system (my car doesn't lock). I'm not as concerned with this, but would like to get it fixed. 58 - tank servo motor not energized despite relay activation 60 - central locking limit position lock not reached Thanks

POST 2 / ORIGINAL POSTEROriginal post

Also wanted to mention that there's no CEL. The check engine light bulb does work. My guess is that it's not completely failed so it's not throwing a code?

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