Master warning light and VSC

Today we had the oil changed and everything was good, drove to the hardware store and when we came back I put a heavy box of tile in the truck (I set it down hard, it was heavy). We then strated it up and backed out and noticed the master warning light along with the vsc light and check engine light. I stopped it and checked the oil and all was fine. Started it back up and lights still on. I drove it across the street back to the oil change place and when we got into the parking lot there was no gas pedal. Pushing it all the way to the floor and it barely made it into a parking place and the battery on the mfd showed 1 bar. When we restarted after a few minutes and when the engine came on it made a clunking noise. The guy from the oil change place came and cleared the codes. I didnt write them down like an idiot. After the codes were cleared it started fine with no noise and ran around the parking lot fine and has run perfect since (8 miles). I forgot that we put gas in as well in between the oil change and hardware store. The gas cap seemed fine. Is it possible the slamming of the box of tile caused a fuel pump inertia switch to cause all this? Could a loose gas cap cause this? It has been perfect since we bought it new with zero problems till today. Thanks in advance for any help. I searched on here and didnt find symtoms like mine.
Alice

 

thank you very much. I didnt know where the 12v battery was. I'll check that first.