i have basically a stock 03 vert, i put some minor bolt ons basically, halltech stinger air intake, ported the throttle body and put a catless x-pipe and borla stingers on it. i had him tune the pcm and a few days later the error code light came on ....... DTC P1133 HO2S Insufficient Switching. i told him and he said he would just turn the code off, isnt this telling me that the ho2s isnt working right and thus the motor isnt performing correctly? and could possibly be damaging the motor? maybe thru running lean or something. i need help. i barely did anything to the car and it shouldnt have error codes unless he tuned it wrong correct?