Hi guys/gals, I'm writing from the left coast of Canada. I have had my E36 for two years now. The car is a Japan spec car (lots of nice used E36s end up here in Vancouver after the Japanese throw them away).
Anyways, the car has no Check Engine light (no surprise to you guys) and an O2 sensor pre-cat and an O2 post-cat! I can't read the owners manual (no read Kanji). If you have a similar car, I would like to know, what the owners manual says about the "CATALYST" light on the instrument cluster. When does it come on? what does it mean? Mine isn't on now, but I am curious. Also, how do you know if things like the O2 sensor have failed? Is hooking the car up to a code reader the only way?