High oil pressure 80 psi on a jeep wrangler, what could be the cause?

One possibility is that water has mixed with the oil forming a thick chocolate milk like mix that when pumped through the system increases the pressure

oil pressure sensor may be bad

Oil pressure switch short on a 2.5 it is on the passenger side on the back of the engine block if the is oil on the switch replace it 99.9% of the time this is the problem cheep to replace and not hard to do.

The oil pressure specification for your engine is 13 PSI at idle hot, 37 to 75 PSI at engine RPM higher than 1600. I suspect your oil pressure gauge sender unit or gauge is inaccurate. I would have a known accurate mechanical oil pressure gauge temporarily screwed into the present oil sender unit to verify actual pressure.

If you have the correct pressure I would replace the sending unit first.

Increase the viscocity of your oil. If you're using 10W30, go to 10W40. If you're using 10W40 switch to 20W50. Don't use single weight oil.

Sounds like a bad oil sending unit...or maybre you knocked the wire off, or it's grounded when changing the plugs.

just regular wear...try to use thicker oil like a 10w-30 if ur using a 5w...otherwise its just normal wear keep an eye on level of oil too might be leakin anti freeze into it worst case scenario

If grounding the dash does not work, try putting a mechanical gauge on it and reading actual oil pressure. Pressure does change while driving, but should not wander. With mechanical gauge, check that running hot at idle (in gear if automatic) pressure should not drop lower than 15psi (I'd rather see 20) High reading should be around 40 -50 but no higher.Low pressure indicates a loss of supply or bad bearing on the crankshaft, high pressure may be caused by sticking pressure relief or restriction in an oil passage.

depending on the weather, and how cold it is, oil pressure will run high until it warms up. now if it still runs high after it warms up then its most likely the oil sending unit.

Have a shop verify the pressure is really low, it could just be the sending unit is defective for the oil press guage, but get it checked, if it really low you could burn out the bearing in your engine, a very costly repair.