so i did this mod as shown here https://www.thegalantcenter.org/show...tic-convertors on the forums but my problem is i put spacers on my rear 02 sensors but im still throwing codes P0431 (warm up catalyst below threshhold bank 2) and P0421 (Warm up catalyst below threshold bank 1) any help? my car is a 2006 galant es 4cly
