I have P0130 which is a Bank 1 Sensor 1 O2 failure

and I have P0150 which is a Bank 2 Sensor 1 O2 failure

What I would like to know is which one is left side and what is right side, and what is upstream and which is downstream.

Thanks for any help in advance

 

It'll help everyone to know what type of car you have - what year, engine, quattro/FWD. A lot of people put it in their signature.

At any rate, try searching this website:

http://wiki.ross-tech.com/index.php/Main_Page

It gives a lot of valuable information about CEL codes.

 

guessing from you posting in the B5 section, and multiple banks means its a 2.8. upstream means closer to the engine. exhaust flows away from the engine, downstream means away from the engine. bank 1 is on the side with cylinder #1, i think thats the passenger side.

 

Its a 96 2.8L 12v A4 Quattro.

I know that upstream means closer to the engine, but I was wondering if O2 sensor 1 would be an upstream one or a downstream one.

Thanks for the help thus far.

 

sometimes a faulty maf will throw 02 codes, i have trouble believing two separate 02 sensors went out at the same time

 

sensor 1 is upstream, sensor 2 would be downstream.

 

Ok, i'll check the MAF as well.

And thank you zadeluca for telling me which one is what