After replacing the O2 sensors today I drove the car for about ten miles before it cut off and now wont start. Any idea what it could be?

What is your question?

The car is turning over but wont start. 98 Volvo s70. I didn't pull the negative terminal off the battery before replacing the upper and lower stream sensors. I cleared the codes using my obdII scan tool before driving it. After the car cut off from driving about 10 miles I hooked the scan tool up and found no codes. The fuel pump sounds like it starts when I turn the key so I'm assuming that's not it. Could I of possibly fried the ecu?

What makes this problem better or worse?

Nothing I can tell

How long has your 1998 Volvo S70 had this problem?

Today only