High oil pressure reading

BOACONSTRICKER

MEMBER
2001 BUICK LESABRE
6 CYL
FWD
MANUAL
130,000 MILES

The normal oil pressure on my Buick LeSabre has been about 65 psi. About a month ago the pressure reading jumped to 85 psi, then a few days later jumped to 130 psi and has been at that reading ever since. I changed the oil filter, but that had no effect. There are no other symptoms - there is not even a warning light about the high pressure - the display just reads "normal". What could be causing this? Could it be the oil pressure sensor? When the engine is not running and I turn the key to "on" but don't start the engine, the oil pressure reads "0". Once the engine starts, the pressure goes right to 130 psi.

6 Replies

MASTERTECHTIM

MECHANIC
4,750 POSTS

Hello,

It could be the oil pressure sender or the oil pump pressure relief valve is stuck here is a guide that can help you fix it.

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

Please let us know if you need anything else to get the problem fixed.

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Wednesday, January 9th, 2008 AT 9:12 PM

TPH

MEMBER
1 POST
2001 BUICK LESABRE
6 CYL
FWD
AUTOMATIC
78,000 MILES

Electronic gauge all of a sudden shows 300 as oil pressure (but also says"normal"). With engine off shows 0 (zero). I'm going to try an oil change with new filter. What other causes would show this increase in gauge oil pressure. P.S. The car's running fine.

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Tuesday, February 12th, 2019 AT 12:57 PM (Merged)

DOCFIXIT

MECHANIC
18,828 POSTS

Faulty oil pressure sender

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Tuesday, February 12th, 2019 AT 12:57 PM (Merged)

JDFMAX

MEMBER
2 POSTS
1998 BUICK LESABRE
6 CYL
2WD
AUTOMATIC
98,000 MILES

I have my engine rebuilt 3000 miles ago. At that time my engine oil pressure went down into 0 but the engine oil level was full.
After engine rebuilt, the oil pressure was set at 80 (the original pressure was 40). The mechanic told me they changed a bigger bump and it is better than the old one.
After 3000 miles driving, I found that the oil pressure goes to 85 and some time reach 95!
But when I restart the car, the pressure will go back to 85 - 90.
During the 3000 miles driving, I never go faster than 80mph and I always keep my speed at 65 on freeway.

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Tuesday, February 12th, 2019 AT 12:57 PM (Merged)

RASMATAZ

MECHANIC
75,992 POSTS

Hi jdfmax, Welcome to 2carpros and TY for the donation

They probably put in a high volume pump in it-if it was me I'll change back to the OEM part oil pump-A typical engine oil pressure while idle should be 10-15psi and at part throttle should range between 30-45 psi -Your pressure is just too high, normally at 70psi the oil pressure relief valve should open-but who knows the pressure relief valve could be sticking/or not opening at all.