High Oil Pressure went from 40 psi to 120 psi

2002 PONTIAC BONNEVILLE
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BLREED55
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On the way to work this morning, my oil pressure went from 40psi to 120 psi and the Service Engine Soon light came on. The repair shop says it will be $1500 to fix. They said there is a leak between the coolant system and the oil line and that there is coolant in the oil. Does this sound right to you?
Dec 5, 2007 at 12:41 PM
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ASEMASTER6371
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Good afternoon,

First, this does not sound right.

I would take it somewhere else and have them check the actual oil pressure to be sure the gauge is correct. It may be a bad sender unit.

https://www.2carpros.com/articles/high-oil-pressure

If the oil pressure is that high, it needs an oil pump. The regulator inside is stuck open and is not regulating the pressure.

Roy
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Oct 27, 2021 at 11:08 AM