when i was driving to a store earlier. the low tire pressure light came on. then coming back home when i went to park when i put it in reverse the engine shut off.. turned it back on and when i put it in to drive the engine shut off again.. i let the car sit for acouple minutes and it was alright again.. what could be the problem? i havent had a oil change in 5000 miles is that doing something? please help i hope i can make it to work tomorrow