on your 03? the tps is only like 50 bucks... it shouldn't cause a no-start condition. When i accidently submerjed my jeep offroad and some water made it through.. it jacked up the TPS and it threw every TPS code in the book... but mine still ran. It just wouldn't accelerate for the life of it.. and it wouldn't kick into overdrive.... but it started.

O2 sensors are relatively inexpensive i believe... under 100... and just put in fuel injector cleaner in your gas... or just run chevron gas. Go back and show them the two middle fingers your mother provided you with.

 

Keep in mind you have 4, yes 4 O2 sensors to replace. Throw in a few hours of labor and its getting pricey.

The TPS should not cause a no starting condition as it is closed when you start it any how. The TPS is closer to 35 dollars.

Why dont you change the oil your self and: unplug, clean, and apply dielectric grease to your elctrical connection? It would be so much cheaper than having the dealer do it.

A 3 dollar (higher in other areas) bottle of injector cleaner will work wonders.

 

Change your plugs, change the TPS yourself. I think its mounted behind the throttle body??
And the O2 sensors are wicked easy.

 

I have had bad TPS's give me a no start. All I got was cranking, though sometimes I could get it to start it ran like hell but I did limp home. The TPS is around 50-70 bucks, I just bought one. Most auto parts stores will hook an obd II scanner to your jeep free of charge, I have one and it is nice to find out exactly what sensor(s) are bad. The TPS changes out very easily and is found on your throttle body. O2 sensors will cause a rough idle, hard to start, or stalling. Not sure if a bad O2 sensor will cause a no start. Again get your computer scanned, the obdII plug is next to your knees under the steering wheel.

hope this helps,
Brian