So had the fuel pump changed. Once I filled up tank it stayed on after I turned key off. I changed the fuse relay for the pump. Didn’t do it again till I refilled up again. I pulled use out and it turned off put back in and it’s not doing it again. The fuse is good so I don’t know what it could be. Fuel pump is Mopar.

2012 Dodge Ram 2500 5.7 Hemi

 

Probably a failing/sticking relay. Unfortunately, they are not easily replaceable. I think there is a kit available for an external relay though.

 

where is that located? Inside tank? @HeyYou

 

Relay is in the TIPM.... Under the hood.

 

@HeyYou link didn’t work

 

Try this one. This looks interesting. No experience with it though.....