I'm pretty clear on things that can cause low oil pressure, and suspect that my issue is likely sensor-related, but: what can cause high oil pressure? Just curious as I searched this but didn't find any solid reasons given for what might actually cause it.
What brings this up is that I've noticed my oil pressure gauge occasionally pegging at 80. Sometimes it happens right at startup, other times it happens while driving. Doesn't seem to matter if the engine's warm or cold. There're no leaks from the filter, valve cover gasket, or anywhere around the head, the level's good (right at the MAX) mark, and there's no noticeable oil consumption. I did have the oil and filter changed about 600 miles ago, but this had happened a couple of times before that. FWIW, this is on a 2000 Limited with the 4.0.
Oil pressure is typically 40psi at cold idle, 25psi at warm idle, and 45-50psi running. Like I say, I really suspect the sensor is on its way out but would like to know any likely causes just in case.
What brings this up is that I've noticed my oil pressure gauge occasionally pegging at 80. Sometimes it happens right at startup, other times it happens while driving. Doesn't seem to matter if the engine's warm or cold. There're no leaks from the filter, valve cover gasket, or anywhere around the head, the level's good (right at the MAX) mark, and there's no noticeable oil consumption. I did have the oil and filter changed about 600 miles ago, but this had happened a couple of times before that. FWIW, this is on a 2000 Limited with the 4.0.
Oil pressure is typically 40psi at cold idle, 25psi at warm idle, and 45-50psi running. Like I say, I really suspect the sensor is on its way out but would like to know any likely causes just in case.