PumpkinRS

Got an ageing sensor behind cat bank 2 and bank 1 P0136 and P0156 after just replacing all 4 O2s - anyone run into this? - I replaced all 4 because I wanted to start with new O2s since the car is new to me.

PumpkinRS

Found a good thread on this
https://rennlist.com/forums/996-gt2-...blem-help.html

rbahr

Apologies for the dumb question, but were they installed wired correctly? Are these OEM quality sensors or aftermarket?

Ray

PumpkinRS

Yes oem installed correctly. I did do a dumb thing and read the bulletin too late in that I used connector cleaner- though the other sensors aren’t throwing a code

rbahr

Do you know if the cats are still good? One easy test is to use an IR temp sensor. the cats should be a bit warmer that the surrounding pipes. Also your emissions should be fine. The cats can also start to break down and cause problems.

Ray

PumpkinRS

Thanks for the suggestion. I'm gonna drive it around and read the plots with the durametric to hopefully gain more insight.