I have had the check engine light go on intermittently for a little while. I finally checked it with an OBD2 reader - have not checked using a VAG yet. It showed only one code, P0175. Which side is bank 2 ? I think it's the drivers side. I'm looking for vacum leaks, have not found any yet. I don't think it's the MAF as it should give an error code for both Bank 1 and 2. Might be the pressure limiting valve - PCV. How can i check it ?
Any advice ?

 

it's a bank 2 too rich code.... bank 2 is drivers side....


-check fuel pressure reg.
-check o2 sensors
-evap canister purge reg valve - n80-
-check fuel injectors


...i'd start by telling us what kind of car you have here and maybe replace all o2 sensors if it's been a while

 

It's a 2002 A6 2.7T with 55k miles - looks like it got deleted from my signature.

 

I cleaned the MAF sensor and the code has not returned. Hopefully that was it.

 

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