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spinnin_four
10-19-2016, 04:26 AM
Hey guys, my A4 has been throwing a P0150 for B2S1 oxygen sensor

i ordered a Bosch oxygen sensor here http://www.ebay.com/itm/121951386097?_trksid=p2060353.m1438.l2649&ssPageName=STRK%3AMEBIDX%3AIT


I reset codes and went for a drive, after about 5 minutes i am getting a P0130 code now, instead of the P0150, is it possible the new sensor is bad? there are no exhaust leaks, engine runs smooth.

i reset code again, and same thing within 5 minutes its back. watching live stream i can see it switching back and forth quickly, graphed it and all seems normal, not sure why it set the code, old sensor had 160k and was pretty worn looking.

Thanks for any help!

*Update- after some checking it looks like P0130 is for B1S1, any idea why that would be an issue now, as it was not an issue before? also see it switching about the same as the sensor i just put in B2S1, maybe since one is older and one is new, they are not sending similar signals to ECU?

gtsingh91
10-19-2016, 07:48 AM
I have a 1.8T but for what it's worth, I bought my car with a bad primary o2 sensor and after I swapped it with a brand new Bosch sensor I got a CEL for a bad secondary o2 sensor which I didn't have before. So I put a new one in and I was good from there. Your case is two primaries so it's a little different.

Davdraco1
10-19-2016, 08:21 AM
I use a 30$ primary off of Rockauto. Has worked for the last 3 months no issues.