O2 Sensor

DJ CptnCrnch · Post by **DJ CptnCrnch** » Wed Jul 30, 2008 6:45 pm

Did a search, but couldnt find the answer i needed. I keep throwing code p0137 (P0137 HO2S Circuit Low Voltage Bank 1 Sensor 2) which is an o2 sensor problem. Is this the bottom or top one?

If i needed to replace this, whats the part number, bc i would rather order online, then goto my local dealer bc they are a pain to deal with.

i should also mention that my A/F bounces back and forth, usually going above 17 then coming back to around 15...it also goes below 10 at times.

Should i just replace both sensors at the same time?

Thanks

ragek23 · Post by **ragek23** » Wed Jul 30, 2008 9:34 pm

well the sensor is the cat sensor or down flow sensor. From what i have hear u should get the part from the dealer only because the aftermarket grade parts have been known not to work.

boxcarfan · Post by **boxcarfan** » Wed Jul 30, 2008 9:42 pm

the A/F sensor is supposed to go back and fourth bud. rich to lean to rich to lean to rich to lean....

DJ CptnCrnch · Post by **DJ CptnCrnch** » Wed Jul 30, 2008 10:09 pm

its a wideband, not narrow...shouldn't be going back and forth that much

ragek23 · Post by **ragek23** » Wed Jul 30, 2008 11:03 pm

can you kinda paint a picture with words of what type of wide band setup you have?
'

DJ CptnCrnch · Post by **DJ CptnCrnch** » Thu Jul 31, 2008 7:57 am

its an AEM UEGO wideband, the o2 sensor plugs in at the end of my LTH. I bought it with the intention of doing MS or buying a S-AFC Neo. But im tired of putting money into the car.