Question about 2004 Pontiac Grand Prix

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Oil pressure low light came on after oil yesterday.

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  • yadayada
    yadayada May 28, 2010

    you say "after oil yesterday" what does that mean?

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  • 580 Answers

Make sure your oil filter is not leaking & that your drain plug is not loose. Also there is an oil sender switch near the oil filter. Make sure the wire is connecting good. If this fails you may have to replace the oil sender switch or put another oil pressure guage on it to ascertain the actual oil pressure. Make sure you have enough of the proper weight oil in the car i.e. 5W30. Good luck!

Posted on May 28, 2010

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Posted on Jan 02, 2017

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  • 1 Answer

SOURCE: Gallardo engine oil light blinging

there is not just one pump in that car its a dry sump system it doesnt work that way. Take your car to the Dealer

Posted on May 26, 2009

txkjun
  • 409 Answers

SOURCE: Low oil pressure light coming on

SOunds like your oil pressure sending unit. It is right by the oil filter.

Posted on Dec 31, 2008

tennkntryboy
  • 10 Answers

SOURCE: low oil pressure light keeps coming on

sounds like the sending unit has sludge in the hole time to replace it

Posted on Jan 09, 2009

libaredneck
  • 119 Answers

SOURCE: I have low oil pressere. i change oil pomp ,senssor.seals. and still have low oil pressure .extenal readin show /20 . boot after 10 minute /0 and light come up .

sounds like mabey spun a cam bearing or main bearings are wore out

Posted on May 05, 2009

adnanbhatti
  • 1188 Answers

SOURCE: Low oil pressure light on, in OLds 2001 silohette

Oil pressure switch is short circuited.

Posted on Jul 30, 2009

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The thing to do is to remove the oil pressure sender and put a mechanical oil pressure gauge onto the fitting. Start the car (if it will start) and watch the mechanical gauge. If there is no oil pressure or very low oil pressure (less than 5 psi minimum), immediately stop the engine. Engine damage is sure to result with oil pressure that low. The cause of the low pressure will have to be diagnosed and corrected before running the engine again. Causes of low pressure could be worn engine bearings or a worn out oil pump. There could also be a restriction in the oil system such as a clogged filter or clogged oil pump pick up screen in the oil pan. The oil itself, if it is dirty and full of moisture will become like mayonnaise in the bottom of the pan at such cold temperatures and the oil pump will not be able to pick it up.

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4 Answers

The oil pressure light goes on and off intermittently.


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(Apologies if this explanation is hard to follow-I'm no mechanic and am basing my response on my understanding of the mechanic's explanation).

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