
Anyway, could be many reasons for it not starting. Silly question perhaps, but is the battery connected properly? First thing the Fire dept do when they get to an accident scene is isolate the battery. They will chop through any wiring etc they feel is necessary to do so.
The O2 sensor might* have something to do with it. I could foresee that some computers would not allow an engine to start if all sensors aren't working, i.e connected. Can you temporarily plug in an O2 sensor off the other car?
I assume the car has manual transmission... If not, the car might have to be in \"park\" before starting, and wiring to the gearbox could be damaged...
Good luck!
