Catalyst full message
 

My uncles 08 is having a slight problem. Keep in mind tricks fully deleted. About a month ago it went to the dealership to have some work done and he never put his smarty Jr. back on stock and it got flashed over. Since then the catalyst full message comes up and the truck goes into limp mode and shuts off at a stop. Got a smarty Sr from a friend and still wouldn't take care of the problem. No matter what level it's on it pops up on the OHD and truck goes limp. Called smarty and did everything they said rail plug, diff pressure sensor open to atmosphere, new CCV and updated smarty with the properly deleted software from topgun. I'm just stumped at this point. Any help would be appreciated.

I'm not a expert on tuners by no means but the tuner you tried might not support the deletes. I have the RaceME tuner and it supports the deletes and i have no issues. Sucks he forgot to set his old tuner to stock.