2001 Jeep Grand Cherokee stalled & will not start

I would check the cam position sensors for a good clean pulse.

code 12
in usa we use OBD2 and a real OBD2 scan tool
and if not USA and is code 12 ,it is the problem.
OBD1 uses that , code 12, long gone here....
DTC 12 indicates battery input to the Powertrain Control Module (PCM) was disconnected during the last 50 key starts.
reset ECU and see if code 12 comes back.

stalls hot and cold or both.
ever tune it up this last decade or last 60k miles.?
there are 50 reasons for stalls.
we dont go there.
we do the basics, the basic tests. ask. (ASE otto cycle engine checks)

The 2001 Grand Cherokee limited 4.7 does the quarter mile in 15.563 seconds. The 2008 v6 Mustang does the quarter mile in 15.378 seconds. It is possible but unlikely. ----------------------------------------------------------------------------------
lexia 3 pp2000

First check for spark at any of the sparkplugs.

who installed the CSM, sounds like it was installed incorrectly?

Also, are your battery connections tight?

running low on oil will not cause a 02 to go bad,replace sensor, have the cat convertor inspected and have the pcm computer updated

have engine scanned for codes and get back to me I'll try to help Thanks Ray

easy trouble shoot easy fix ! check to see if its getting fire if not replace the crank sensor it will fire right up common problem with the jeeps . Hope this helps you out !!!

Does the vehicle crank for extended period of time upon first starting? If so the fuel pump needs replacing.

good morning to you and welcome to fixya.com. hope we can get you fixed here. just a couple of questions first? have you changed the fuel pump yet? if so where did you buy the pump from? your pump is actually building up to much resistence and is unable to overcome it in turn no power is getting to pump as needed. i have a grand cherokee with 230k so i love hearing that you have that many miles. lets keep you rolling. let me know and ill help you out.