Sounds like a bad Auto ShutDown (ASD) relay. It's in the PDC.

 

Would that flag a cam/crank position sensor code?

 

Yes if the engine turns 50 rotations without a ignition signal back to the PCM.

 

I just picked up a CMP and CKP from RockAuto.com for a great price. Mine started dying on the trail and throwing a P0340. I'll update when I have them in hand.

 

thanks for your help guys. I took the engine ECU out and took it apart and I found one of the compoments was stuck down with glue. I bought this jeep from a car dealer, it just goes to show these people are up to all tricks, I know that they cannot do anythink because I bought this jeep 3 years ago, I have one more question for you all, I think i have found a replacement ECU, the question I ask does it need to be coded for my Jeep. It hasn't got a emboliser through the key fob, it just has a seperate alarm.

 

what is the PDC? im still new this stuff

 

I would like to text my Camshaft Position Sensor, as well. Unfortunately, I do not have it in my budget to purchase a second phone line with unlimited texts, so it will sadly go on without a way for me to text it and ask questions.

Sorry, man. I couldn't resist Testing your Camshaft Position Sensor: with the ignition in the on position and the engine turned off, connect the test leads of your multi-meter to the outside two wires on your sensor connecting harness (you most likely have a 3 wire sensor), leaving the middle wire alone. If you get a reading greater than 10.5 volts, your sensor is ok.