Hey guys. I know to always check other posts to see if i can figure out the solution, ad ive found a few threads but none have an actual answer. I have a test pipe and greddy ti-c exhaust on my evo8 and am getting CELs for my rear o2 sensor. So i did the spark plug anti fouler fix because everyone seemed to have good feedback on it. Well it fixed the light and now my fuel is flowing properly because i was burning a lot of gas before i put the spacers in. Well now im getting the CEL for high voltage on my rear o2 sensor and cant figure out how to fix it and turn the light off for good. Please any advice would be greatly appreciated. Thank you

 

head over to the ECUFLASH subforum and find the "rear 02 eliminator patch" and be rid of it.