"oil pressure low cut off engine now" keeps coming across the dash on 2006 chevy impala, i have had the oil changed no oil leaks where found any where on the car, car does not run hot,oil level good, and i do not smell any smoke when i am driving, what could be causing the light to come on and go off, the light never stays on longer than 5 seconds pls help
At some point, your engine is registering low oil pressure and warning you the oil pressure is insufficient to lubricate the engine properly.
How does the engine know this? What causes it? Excellent questions. The engine 'knows' this because there is one or more sensors that read the oil pressure all the time. The sensors report to the computer which reports to you. They could be faulty. On the other hand, there could be times when oil pressure IS low. Your oil pump may be mal-functioning. Normally, I would expect the oil pump to either do its job properly or NOT do it properly but not act intermittently. It may warrant being checked by a professional. Another reason for this condition could be the oil itself, though you report you just had it changed. Presumably, whom ever did the change put in the proper oil grade, service and weight, recommended by GM.
Another thought, is this warning seen by you immediately after you start the car? If yes, it is normal for oil to take a second or two to build the proper pressure, particularly in cold weather. Where I am at, it is cold. Oil doesn't like to move when it is cold (like me) so it takes a bit of time to get up pressure (like me).
If this continues, you may want to have this problem looked at by a professional, as I said.
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I tend to agree with highonrope, (16 votes) it is probably a faulty oil sensing unit or connection. Please read on. I would hate for you to burn up your engine because of a possible faulty oil sending unit ...
When does this light come on? Is it the same each time you drive?
If this were my car and I were concerned about the light, as certainly you should be concerned, take it to the dealer, tell them what you have said here. Offer to leave it over night or to have the service manager drive the car to see when the light comes on. I'm not a mechanic. I believe this warning should be recorded in the computer in your car and I believe the service mechanic can attach his or her OBD to your car and read the circumstances of this issue and resolve it.
You should be able to drive your car and not concern yourself with this unknown.
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You probably have a bad oil pressure sending unit or a bad connection to it.
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THANKS IF I TAKE IT TO THE SHOP WHAT DO I TELL THEM I NEED THEM TO LOOK AT BC I TOOK IT TOO A FEW PLACES ALREADY AND THEY SEEM TO NOT KNOW WHAT I AM REFERRING TOO BECAUSE THE LIGHT WILL NOT STAY ON OR COME ON WHEN I AM AT THE SHOP FOR THEM TO SEE WHATS GOING ON AND THEY SAY IN ORDER FOR THEM TO RUN A DIAGNOTIC TEST THE LIGHT HAS TO BE ON FOR THEM TO TELL THEM WHATS WRONG.
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