Question about 2004 Toyota Sequoia

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The oil gauge in my 2004 toyota sequoia reads sporadically, anywhere from no oil pressure to high oil pressure. I'm guessing it's the oil pressure sending unit. Where is it located on a 2004 sequoia?

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Have you changed the oil sending unit, this is the most probable cause.

Posted on Jan 07, 2009

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replace the oil pressure sender unit ( not the pressure sensor unit) as it appears to be faulty and stuck giving the wrong reading.

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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.

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