The "check gauges" light didnīt come on? Did you check your oil level?
It can be the oil pressure sending unit, the instrument or a real low oil pressure.
The instrument you can check by pressing the odometer button and at the same time switching on the ignition. You can release the button as soon as the ignition is on. The instrument cluster will start a self test, all lights will be lit, the odometer counts from 00000 - 111111- 22222- 33333 and on and all instruments will go to full scale and back to zero. A test ok will be shown by "DONE" in the odometer display.
JEEP Grand Cherokee 4.7 Lmtd 2004
HID 8000K in low and fog / Quad Squad member
Monroe Reflex shocks /
Pirelli Scorpion ATR 245/65/17/
Transgo reprogramming shiftkit.