What does 0 to 5.4 mean on the oil pressure gauge Jeeps?
0 PSI to 5.4 PSI - Normal operating pressure for all engines is between 27 and 75 PSI. If your gauge reads 0 PSI, the oil pump could be faulty, or there may be a problem with the oil filter or oil pressure sensor. If the pressure exceeds 85 PSI, the engine may be running too fast, or there may be a problem with the oil pump.