2004 Rubicon: Wife was traveling down the road when the jeep just quite.
Jeep will crank but does not start.
1. Will the Sentry Key System cause this?
2. Will a bad crank shaft position sensor cause this?
Yes the crankposition sensor can cause that and no the Sentry key system will not. The Sentry system will at least let the engine start and run for 1-2 seconds before killing the engine if it decides the right key was not used to start it.
Remember that having a different opinion doesn't also require one to be a jerk when expressing it.
getting any codes/chk engine light?
my cam shaft sensor went out a few weeks ago but it did throw a code and CE light came on. was running when the CE light came on-turned it off/on to see if it cleared and nothing but turn over, don't know if it would have died if i would have tried to drive it. was a fine 1 min, dead the next. if it is that and you go to an auto store that can't find it as a cam position sensor, try ingition sensor-seems to be what their computers call it. also if you do need one, take the old one if possible-there are different connectors on them(got the wrong 1 first of course)