Okay well the other day it was pretty cold here, well I got done with my community service at 6 p.m. (started at 7:30 a.m.) I was going to leave and my explorer did not start, it is an 01 sport, btw it was turning over just no start. Well I tried to jump it, didn't work, so I checked the fuel pump, it was fine, so I reset it, didn't help, reset my toggle switch for remote start, didn't help, unhooked my battery then re-hooked it up, didn't do anything. Well I finally gave up and called a towed truck and got it towed to the ford dealership down the road from my house. Well they looked at it the next day, and told me that it started right up for them, but they did end up putting it onto there little thing to see if anything was wrong with it, and they said my o2 censor was bad. Could that really have caused my explorer not to start? Or is there something else?