why is this O2 sensor really really black???
01-06-2008, 07:46 PM
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why is this O2 sensor really really black??? hey guys jus took out my bank 1 sensor 1 to replace it with a new one because of po171 and po131 low voltage bank 1 sensor and running lean bank 1, ok then i found out that my wires were melted and were being exposed!! vurrently im fixing that and i jus wanted to kno if it will be ok to use the old sensor back if i clean it? thanks
01-06-2008, 11:56 PM
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ttt.. i hope i can fix the problem i have been trying to trace it down for so long!! the car has no low end torque and it hesitates and vibrates under load!!!! i kno my cats may be bad due to the rotten egg smell but why the hell will it keep throwing po171 and po 131 and the codes only come on after the car warms up!! it has something to do with open loop and closed loop!
01-07-2008, 01:49 AM
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my car acts the same way, using autotap i found my bank 2 sensor 1 not acting the way the bank 1 sensor is. My car also hesitates, vibrates under load, misfires under load as well but smooths out when the rpms climb. AND it drives just fine in open loop, but once my car hits closed loop thats when it drives like crap. So my o2 sensor is taking a crap, and im willing to bet we both have the same problem.
01-07-2008, 02:17 AM
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yea bro if i find out my problem b4 u i will pm u watsup, but pm me if u find ur problem! btw i also changed the egr o ring seal on top of the intake, mine was literly melted!! u can change dat too to start off
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01-07-2008, 11:17 AM
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If you don't have emissions in NM just have the damned things tuned out. I have plugs in all 4 of my o2 sockets and I got 26 MPG on the highway the other day in my A4. Thank you HPTuners for letting me not have to put up with that ridiculousness anymore!
01-07-2008, 03:04 PM
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i had the same problem with getting a lean code on bank 2 with my car, and since it was tripping a lean code the pcm basically goes into (oh **** me mode) and pours the gas in causing it to run super rich
i was starting to foul out plugs and everything the best thing to do in that situation is even though it narrowed it down to one bank, the other o2 sensor is probably messed up too since they dont like to be filled with carbon, i finally fixed it by replacing both sensors and disconnecting the battery to reset the pcm (might not be necessary but i figured it would be worth a try) and everything cleared up and is all good. But running rich in your situation since your still running cats might have clogged they up pretty bad so that might be another problem to chase if it still runs crappy after you replace both front 02 sensors
And i know i am OBD 1 and you're OBD 2 but your problem sounds exactly like mine did
i was starting to foul out plugs and everything the best thing to do in that situation is even though it narrowed it down to one bank, the other o2 sensor is probably messed up too since they dont like to be filled with carbon, i finally fixed it by replacing both sensors and disconnecting the battery to reset the pcm (might not be necessary but i figured it would be worth a try) and everything cleared up and is all good. But running rich in your situation since your still running cats might have clogged they up pretty bad so that might be another problem to chase if it still runs crappy after you replace both front 02 sensors
And i know i am OBD 1 and you're OBD 2 but your problem sounds exactly like mine did
01-07-2008, 05:24 PM
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ok thank you 1994Z28LT1 i will go change out my bank 1 O2 right now after my car cools down! i will check out my bank 2 sensor and just clean it, but i hope this will fix it! and man i bet ur right about my cats cloggin, i opened a tread about that, but ok but do u think it will throw any codes regarding the cats being clogged??? will i run lean or will it throw the codes ffrom the 02 sensors that are after the cats??? thanks
