My oil pressure had been at about 17psi (per the dash gauge) and lately it seems to pop down to 3 to 5psi abruptly at idle and the check guages light illuminates. I drive to the next light and it may or may not drop that low again. The temprature is consistently 165 degrees even at 95 degree temps outside. The engine runs smooth no ticking or knocking. Can I assume that since the temprature is not climbing, there is no audible signs of a problem, and the pressure gauge does not remain consistently low at idle that the issue is most likely in the guage, wiring, or sensor OR could this actually be a low oil pressure issue.