As many of us are aware.. Some of the exhaust systems available right now (with an offroad pipe) will trigger a Check Engine light because the rear O2 sensor is not responding appropriately. I found a GM OBD-II Sensor simulator on this site:

http://www.fasttoys.net/grandprixexhaust.html

The only issue I have with this is if its Wire compatible.. Basically the rear 02 sensor only needs to oscillate a voltage slightly but to maintain a particular voltage on average, and it won't throw a CEL.. If it maintained a steady "Optimum" value, it would throw an error because it would think there's something wrong.


and a project circuit if someone wants to run with it..

http://www.bobblick.com/techref/proj...sim/o2sim.html

Which is supposed to be adjustable.

Hope this helps you techies out there who choose to eliminate a Cat for racing..

 

ok, so how do i buy one from this site? is there a home page to this site?