engine issues i think

ok i was driving a short distance. at about 25mph didnt get to where i was goin it died on me and wouldnt turn back over..

its a 98 izuzu hombre (samething as an s10) anyways i looked around the grounds and power wires were good. i had my fuel pump ground come off before so i check that again.. nothing.. so i look under the exaust and the guy who welded my exaust in didnt plug back in the sensor under the cab that goes into the exaust system

anybody know what more than likely is fucked up now...

bump i need help

do u have battery voltage? ck battery w/ a volt meter