I NEED HELP WITH A 1998 ACCENT. THE CAR AUTOMATICALLY SHUTS OFF WHETHER AT IDLE OR DRIVING AFTER ABOUT 20 MINUTES. DID COMPUTER SCAN COMES UP 02 SENSOR. SO THEN REPLACED 02 SENSOR STILL DOES IT REPLACED AGAIN STILL DOES IT. WHAT COULD BE THE PROBLEM THEN?????

 

HELLO my car did the same thing yrs ago, but it was my computer..could also be your fuel pump...or RELAY to fuel pump..more likely the pump...
anyway, I don't know how much help I can be, but I got my computer at a junkyard for fairly cheap..you could also search EBAY..just make sure you get the right computer (STANDARD SHIFT verses automatic) if that is the problem..good luck!