…sometimes I need a jump to start it it’ll run but when I put it in reverse it’ll shut right down. I have no codes changed out the alternator, module, there are no misfires, I got the battery tested it’* fully charged no dead cells I’m not sure what to do next. Any ideas or someone dealt with an issue like this?

What vehicle are we talking about?

How many miles on it?

How many miles have you owned it?

Any recent repairs?

Any recent trauma?

How old is the battery?

What region does it live in?