I`m experiecing this in my 05 Impala SS Series 2 L67, with my 3" catless DP with rear o2 delete & o2 emulator. I dont need to waste money on a $700 4HR dyno tune with HPTuners Pro when it cant get rid of the cat diagnostics, I also have HPTuners standard though it is also a lose since it cant help remove the cat diagnostics test. Is there any other way I can get around this I dont wanna run ****ty like this with slight KR here and there its annoying and im wasting 93+ thats not cool. I think I might just bolt the factory dp up and leave the grocery grabber alone.
