The oil pressure sensor on 2002 Jeep 4.7L V8s is located right above the oil filter on the underside of the engine toward the front of the engine on the driver's side. It is easier to get at it if you remove the oil filter first. There is a small red tab on the electrical connector attached to the oil pressure sending unit. That small tab must be slid outward before you can remove the connector and get a socket (you will need a 1 1/16 Deep Socket) on the sending unit to remove it. Depending on how the electrical connector is oriented the easiest way to slide it out may be to use a very small flat blade screwdriver to push it outward. I could not find a torque spec for installing the new sensor, but be careful not to overtighten it. How this helps.
The oil pressure sensor is on the top rear of the engine, next to the distributor.
On the fuel pump module, in the tank.
where is the ac drain on 1999 jeep grand cherokee limited
your oil pump could be failing
If it is on a 4.7L engine, and the oil pressure is ok, then the lifters are failing.
your oil pump is bad
Yes
left of the thermostat in the intake behind the alternator 1 wire on it white connector on 5.2L
There wasn't a 2003 Cherokee. The last Cherokee was 2000.
above the starter
No, too many were produced and it is not a limited production vehicle like the 1998 Jeep Grand Cherokee 5.9 or the SRT.
Not too difficult... That is, if you can find it. I have a '96 JEEP GC Ltd & my oil pressure sending unit was located at the back of the intake manifold by the distributor cap. !!!Pain in the Ass!!!