Hello! I'm looking for an o2 sim that is wired in to the Sentra, it seems that all the companies like Caspers Electronics no longer sell the device anymore and Caspers Electronics was fed an 80k penalty from CA air resources board for creating such a magical device! haha -_- which leaves me dead in the water... I'm pretty sure with an o2 simulator that modulates and pulses voltage I can pass a CA OBD-II Smog check...which isnt the goal, my goal is to eliminate P0037 from re-appearing every 5 minutes i drive the dang car. If I'm wrong about any of this please correct me and lead me into the proper direction. I am ASE Certified In A6 electrical and pretty comfortable with wiring and soldering so if anyone has any info at all on where i can get an o2 simulator still that pulses a readable voltage i would love to get my hands on it, also im not looking to do the spark plug fouling ghetto technique as its called or the resistor mod unless i cant find a legit sim. thanks for the replies and have an awesome day!