After installing new Magnaflow catted X and cat-back, I broke one of the O2 sensors, so went to Autozone and purchased a new Bosch unit (#13127). Installed the new one on the drivers side, old one on the passengers side. Now I have the dreaded check engine light on - haven't pulled codes yet, but my initial question is, is it possible that only replacing one of the sensors has caused it to throw a code? Any help appreciated! Thanks!
Matt
Matt