Question about 1997 Pontiac Bonneville

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I have a 1997 pontiac boneville se the oil pressure gadge is reading 140 psi it should be 40 psi i replaced oil pressure switch it still reads 140 psi what could be the problem

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  • bigj6360 Oct 13, 2008

    I have the same problem on my 2003 ssei. I have also changed the oil and oil filter (It was due).

    Don't know what it is.

  • bishop53 Dec 07, 2008

    Same problem on my 2000. Any ideas?

  • Anonymous Dec 20, 2008

    Same problem....high oil pressure reading. I replaced the sending unit, but no difference. Please advise. Thanks.

  • Anonymous Jan 05, 2009

    I have a 2000 Pontiac Bonneville SE. The oil pressure gage is reading 120 PSI at 2000 RPM and about 95 at idle (750 RPM)


  • Anonymous Jan 21, 2009

    1997 Pontiac Bonneville SSE the oil gauge reads 50-70 psi. Please assist in identifiying the problem and how to possibly repair for normal oil pressure reading.



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Ckeck the ground wire located near the sensor... this causes this problem

Posted on Feb 28, 2009


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1 Answer

No oil pressure on idle

Did you check the oil level in the engine?
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What should oil pressure be at idle.Does the read out on your dash always right.

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Should probably read 40 -60 PSI driving.

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What should a 2002 Pontiac Bonneville oil pressure gage read at

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I have oil pressure until i stop , then it drops to below 10 psi

Increase the viscocity of your oil. If you're using 10W30, go to 10W40. If you're using 10W40 switch to 20W50. Don't use single weight oil.

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My stop light keeps coming up with the problem oil pressure,i have a golf gti turbo

Get the oil pressure tested with an outside gauge. If you run short of oil pressure, turbo and engine will suffer, as you know....

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Oil pressure switch

Pressure switch is usually located near the oil filter and generally has two wires on it. Best way to check it is by putting a manual oil pressure gauge in it's place and reading actual oil pressure. If your symptoms are no oil pressure reading or abnormal readings, with no tapping noises (or worse) from engine then it likely is the switch. Most require a special socket to remove but the sending units are not terribly expensive.

Nov 29, 2008 | 1992 Pontiac Sunbird

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