I have looked and looked but does anyone sell a 02 simulator for the R53 post cat? I run a Miltek header with high flow cat and always get the “catalyst under threshold” cel code. Drives me nuts!! I clear the code and sometimes it stays off for a couple days and other times just one drive. I have changed out the 02 a couple times and know that’s not the problem. It’s like not running a cat at all.

 

I tried like 3x different kinds and none worked.
Pm Adriancl , he tuned mine out for rear 02 related codes

 

Do you have a contact?

 

Adriancl is his username, shoot him a PM. He's usually quick to respond (within a day). Be patient, he lives on the other side of the pond.

 

Thanks!

 

Don't know if you solved the problem. Came across this while shopping some parts. Another possible option maybe?

https://www.waymotorworks.com/o2-sensor-module.html

 

yes that’s exactly what I need and called them and was told they don’t sell em anymore. Darnit!!

 

Have you tried one of these , there's various kinda and you just gotta find which one works for your vehicle. Ive had them work on other vehicles but didn't try on my mini as I just tuned it off.