help please!!!! my car keep dying when i come to a stop

did anyone have this problem? i got off work today and drove half way home and when i was coming to stop at a red light and it started to die and now my car keeps dying when i come to a stop. if in park the car runs fine but when i put it in drive of rev it cuts off or idles up and down till it dies. i have no check engine light but when i pluged my diablo sport tuner into it and ran a sys check it gave me these trobble codes.... p0600 serial communication, p1000 obd systems readiness test not complete, p2105 throttle auctuator control system force engine shut down,and u0300unknown. help me please. i have diablo tune jlt cai slp axle back and a throttle spacer my car has always run fine till today.

i got new batt and alt like 3 months ago.

ok i will check to see if i have a water leak but it has'nt rained where in like two weeks till today. my car is in the trans mission shop anyway. i had my tranny done march 5th. iv seen people with diablosport tuners have these same codes and they clear them and they dnt come back unless they change somthing in the tune. also there cars run fine with the codes, they say this happends evey time they go from stock tune back to the can tune etune or change tire size exc. so im thinking its my torque convertor not unlocking when i come to a stop cuz it make noises and shakes almost like i have a standerd and im not pushing the clutch in. my tranny is under warrenty but cuz the scaned it and it showed those four codes there trying to say i have a engine problem. but i told them the codes are from the tuner. i told them i would put the stock tune back in and take the cai off and im willing to bet my pay check the car will do the same thing and will not show those codes cuz i never had a check engine light and iv had this tune and cai for three months and never had a problem till this past monday. what do you guys think? any body ever had torque conv unlocking problems?