Originally Posted by 03LexIS300

^^^ yea same here, but at the time I didn't know about the PNP they have for the o2 delete. The o2 simulator is very easy to wire up though, and its only 4 wires so its not too awful bad splicing into the factory wiring plus I taped all of my wiring back up and mounted the chip looking part of the o2 simulator inside the ecu housing so it all pretty much looks factory done. Also what led me to believing it was the o2 sensor itself and not the o2 simulator was the fact it only threw up one o2 sensor code where as if the o2 simulator wasnt working right it should have thrown up 2 codes, one for each o2 sensor B1 S2 and B2 S2.

Originally Posted by IS3_FTW

Fixed

Originally Posted by 03LexIS300

Sure is with new Denso B1 S1 o2 sensor

Originally Posted by Speedshop

I have a set of hp racing headers on my 2002 lexus is300 and they work great. I had to purchase the o2 sim but for the check engine light to turn off.