I just threw the code 67 which is "catalyst system efficiency below threshold". I fixed it for now by simply resetting the ECU. My ? is, how can I prevent this from coming back on? I have a test pipe so I know why its coming on, and its not that big a deal to reset the ECu and wait a week or so for it to come back on, but its annoying me. I remember seeing an O2 simulator somewhere to prevent this from happening with a test pipe? Does anyone know about theseif the are worth it/work, and where I can get one?

 

Don't know for sure, but I've read things about people wrapping the 2ndary O2 in foil ?? And this could trick the ECU... but I never tried it... I have a pimp CEL on at all times

X2

 

I heard about that also, but I want to be sure before I go under the car and take it out.