Question about 2005 Buick LeSabre

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Oil pressure sensor light comes on and oil level is fine

I have 05 lasebre and the oil sensor light comes on and when I check the oil level it is fine. The cars temp is fine, not overheating at all. Is this just a bad sensor? Where is the sensor located?

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  • jdboston Jan 15, 2009

    I have the same issue-oil pressure gauge goes from 130 "Normal" to 0 "Low" and light comes on-mechanic says probably an issue with gauge as there's no other signs of issue (temp, noise, etc.)

  • Anonymous Mar 05, 2009

    oil pressure light comes on when I am driving and goes off when I sit idle. The pressure goes from normal 130-0 Low psi

  • indygirl03 Apr 06, 2009

    I just recently started having this problem. The oil light came on momentarily and then went off. The psi numbers kept rolling around from 14 to 130. It would finally stop on 130 until I came to a stop light and then it would start rolling around again. Every once in awhile the light would flash on and off. The oil was checked and it was full. The engine was not making any noise. Help

  • boley Apr 11, 2009

    Oil Light comes on for 10 to 30 seconds, then goes back off for a few minutes.  The digital oil pressure reading goes from 130 to 0 and back again.  Oil level is fine. Engine Temp fine. No strange noises. Just turned over 60,000 miles. Exact same model car as these other guys.  Strange how we are all having this issue at about the same time.

  • Poppatop May 18, 2009

    Now isn’t that strange; I have a 2005 Buick LeSabre and the same thing started happening to me yesterday. The oil light will come on momentarily and the oil pressure will fluctuate between 0 and 130, then settled down and works just fine for awhile and then does the same thing again.

    I plan on taking it to the dealer where I bought it tomorrow.

  • Anonymous May 18, 2009

    Same problem... Mine just started on Friday, May 16th... Is this a bug/virus that Buick built in to keep them in business? Light comes on, pressure fluctuates from 2 - 145, kind of like the stock market last year. Oil change 30 days ago, car only has 49k on it.

  • rhea2love May 20, 2009

    oil pressure sensor light comes on for a few seconds, goes off. Oil level fine. Engine temp fine. No noises. 2005 buick lesabre. 86,000 miles.

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This is probably an oil pressure sensor problem.  Randomly going from 0 to over 130 is means the sensor is putting out out of range signals.  Mine would even read --- at times.  I told the mechanic to not spend any time troubleshooting just change the sensor.  $121 including parts, labor and tax.  The gage should read about 70 psi plus or minus several psi, and move up a PSI or two as you rev up the engine.  It took him about 10 minutes to change it, once he got the part.  There would have been a diagnostic charge of about $50, had I not been sure.

Posted on Apr 13, 2009

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The oil sensor is a screwed in plug on the left side of the engine, and facing the front of the vehicle. I bought one here at eBay:
http://www.ebay.com/itm/121092061858?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1497.l2649
or at this eBay store: http://stores.ebay.com/AllDayParts-Outlet?_trksid=p2047675.l2563

Drain the oil from the pan, disconnect the sensor connector, unscrew the sensor with a wrench, remove the old sensor, install the new sensor (don't forget the "O" ring), and tighten it carefully (the nut is plastic), reconnect the connector, and pour the oil back into the engine through the black cap on the valve cover (near the yellow dipstick handle). Confirm that the oil level is correct.

Posted on Oct 31, 2013

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