Depending on the type of motor in the grand, the oil pressure sending unit should be located somewhere on the side of the engine block. Check the wiring harness to make sure of good connection, then trace wiring back and try to find cut or nick in the wiring.
The oil pressure sensor is on the top rear of the engine, next to the distributor.
above the starter
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!!!
On the 4.7 V8 it is above the oil filter, you'll see the wires going to it.I checked and it is a 1 1/16" deep socket for the sending unit.
It is on the back of the engine, next to the distributor.It is on the back of the engine, next to the distributor.
The oil pressure sending unit on a 1999 inline six cylinder is located on the engine block very close to the oil filter. It is constructed of plastic and metal, screws into the block and has a two wire lead plugged into it.
Jeep dealer.
The fuel pressure regulator on a 1994 Jeep Grand Cherokee is part of the pump module in the fuel tank.
If check gauges is lit and the oil press gauge is low, you have low oil pressure or a failed oil pressure sending unit.If check gauges is lit and the oil press gauge is low, you have low oil pressure or a failed oil pressure sending unit.
My jeep had the same issue, normally it was when it was in idle. We didn't do tests or anything but found that when we replaced the oil pressure sending unit, it fixed it. We Guessed that its the unit not the actually issue with the pressure...
Check sending unit or sending unit wiring for short to ground. Also could be a plugged oil line causing a spike in pressure. Try installing a mechanical gauge to get an accurate pressure reading.
Bad sending unit in tank.