Question about 2003 Toyota Sequoia

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Fluctuation on the oil pressure gauge reading

2002 Toyota Sequoia:
My oil pressure gauge is fluctuating between the 3/4 mark and the 1/4 mark. Unusual for my car. I have changed the oil and oil filter. Seems to do slightly better once the engine warms up. Can you help?

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  • Anonymous Mar 28, 2014

    Oil pressure gauge shows just below high all the time running or not key on or off

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The oil pressure sending unit is a sensor with an internal diaphragm, if the internal diaphragm is damaged , or the line to the diaphragm is blocked you can get this kind of fluctuation on the oil pressure gauge.

The oil pressure value must be read by installing a mechanical gauge near to the oil pressure switch and checking the pressure.

If pressure is ok, replace the sending unit. If there is a real pressure drop, check the oil pump.

If you still get fluctualtion after replacing the oil pressure sending unit, replace the oil pressure gauge.

Posted on Nov 24, 2008

  • Ginko
    Ginko Nov 24, 2008

    I report the solution to this problem on Sequoiafrom a Toyota mechanic.

    I quote:


    "the issue with the Sequoia is really fixed by
    replacing the printed circuit board behind the inst cluster, thusly
    replacing the combination meter ECU.

    If you want, please comment back to the Client, he needs P/N 83291-0C012-RP if he desires a permanent repair..."

    Toyota Ed


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  • Expert
  • 93 Answers

This is probably just a bad gauge sending unit on the engine but double check the engine oil level!!!

Posted on Nov 24, 2008

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