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Will an oil light come on when engine needs oil?

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The trigger for the oil light is low oil pressure. That can relate to low oil level if the oil pump cannot pick up oil.

Posted on May 04, 2017

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Ultimately it should...

BUT... "needs" is a bit of an UNDERSTATEMENT...

AT that point the engine will have to be UNABLE to pump
ANY OIL... (ASSUMING the sensor still works).

That means you will hear your engine self destructing
as the sump gets THAT empty...

To rely on that as a measure could be solidly
defined as TOTALLY CRACKERS.

TOTALLY...

Carnac the Magnificent

Posted on May 04, 2017

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1 Answer

Why would the oil light stay on?


That depends on the type of oil warning light being displayed. There are 2 types of warning lights

1. Low oil pressure light which all cars have
2. low oil level light which some cars have.

Low OIL PRESSURE warning means the oil pressure is below minimum and when this happens there will be insufficient lubrication of many engine parts because sufficient oil cannot get to all parts of the engine it is required to lubricate. Until the cause is identified and rectified the warning light will remain. If you run your engine with low oil pressure you will cause expensive damage to internal engine components.

Low OIL LEVEL warning means the oil in the sump has dropped to a dangerously low level (which may be due to an oil leak or abnormal oil consumption by the engine.) This warning means the oil level needs to be topped up and the warning will stay displayed until you top up the oil. Running the engine with low oil will cause expensive engine damage.
Since it is a 2 minute job, Oil levels should be checked fortnightly as a minimum, together with radiator coolant and power steering fluid levels, if you run the car most days each week as most people do.

It is possible for a warning light to remain displayed when the cause has been dealt with because there is a problem with the sender unit. However it needs to be established with alternative checks that the problem has been fixed before investigating if there is a problem with the warning light itself.

Nov 21, 2015 | Cars & Trucks

1 Answer

Check oil light stays on


Your vehicle may have an "oil level" sensor built into the oil pan. If so, and the sensor is bad, the dash will constantly tell you that the engine needs more oil even if it does not. Checking the oil with the dipstick, a minute after the engine has been turned off on level ground is always the best way to check your oil. Try scanning the vehicles computer systems to see if there are any fault codes. The warning light may also be on a timer that just needs to be reset. The "Check Oil" light should be separate from the engine oil pressure warning light. As long as the engine oil pressure light stays off, you should be ok. Checking the oil pressure with a manual gauge would be a good idea as well.

Apr 23, 2014 | 1999 Toyota Corolla

1 Answer

Oil min light keeps coming on


What kind of oil? Is its not synthetic it's wrong...the Audi engines have a small oil pickup tube and the cheap oil gunks up the engine and clogs pump screen causing light to come on eventually engine failure....you need to flush engine ....you can use kerosine or go to parts store and tell them you want to clean the internals of gunk ...pour in engine oil let run for few min drain oil ...buy cheap oil for this do same thing 3 times ...when light goes off your done fill with fully synthetic oil and you just saved your engine ...only synthetic oil

Jan 11, 2014 | 2001 Audi A4

1 Answer

I need to turn off oil light on 2004 jeep liberty


The oil light should go off when the engine is started, if it stays on when the engine is running there is a fault in the lubrication system. Not enough oil in the engine or the oil pump is not working, damage is occurring to the engine bearings and the engine will fail big time! Other reason (hopefully) the oil pressure switch has gone faulty and not switching the light off. Needs checking out with a oil pressure gauge.

Jan 03, 2014 | Cars & Trucks

1 Answer

2004 lincoln avaitor oil light comes on the engine shuts down


Does the oil light come on BEFORE the engine shuts down? I have to ask because it is NORMAL for the oil light to be on when the engine is not running. I had a customer that said the same thing just last week. After we wasted a bunch of time (which the customer ended-up paying for) checking the oil level, the oil pressure, and verifying correct oil pressure gauge, light, and sending unit operation, it turned out that the crankshaft position sensor was bad and causing the engine to shut down and it had absolutely NOTHING to do with the oil light - it was functioning as designed.

If the oil light is coming on before the engine shuts down, the first thing you need to do is check your oil level. If the oil level is OK, you need to check the oil pressure with a gauge to determine if there is an actual engine oil pressure problem or if the oil pressure sending unit, gauge or light is malfunctioning. Also, it is highly advisable to not drive the vehicle AT ALL if the oil pressure light is coming on while driving until the cause of the light coming on has been determined and repairs have been made. Otherwise, SEVERE ENGINE DAMAGE may result.

Feb 21, 2012 | Cars & Trucks

2 Answers

Oil Light is on need to Reset it. Don't have manaual.


Do you mean the "Oil" light or the "Oil Life System" light?
.
If the oil light is on, you need to stop operating the engine and have it checked to find out why the light is telling you that there is no oil pressure.

If you mean the Oil Life light, Then here are the instructions:

How to Reset the CHANGE ENGINE OIL Message

1. With the ignition key in RUN but the engine off,

fully push and release the accelerator pedal slowly

three times within five seconds.

2. Turn the key to OFF.

If the CHANGE ENGINE OIL message comes

back on, the engine oil life monitor has not reset.
Repeat the procedure.

You can also download a PDF version of your owner's manual for free.
2000 Pontiac Montana Owner's Manual

Feb 19, 2011 | 2000 Pontiac Montana

1 Answer

Bought car and was overfull on oil, oil light and check engine on


what kind of car? have you looked up the code? need more info

May 08, 2010 | 2004 Hyundai Tucson

1 Answer

1994 mercury Topaz oil light is on and i do not need oil


Low Engine Oil Pressure

The oil light is signaling low oil pressure in the engine's lubrication system. You say that you have checked the oil level in the engine and it is ok.

The oil pressure needs to be checked with an oil pressure gauge. (It is most unlikely that the warning light is faulty).

Should the oil pressure prove to be low - as I expect it will - the cause needs to be investigated. It is likely that there is a malfunctioning or failed oil pump or the oil pressure relief valve is sticking in the fully open position.

Failure to change the engine oil, at least at intervals stated by the manufacturer, will result in severe oil degradation and reduced oil pressure. However this is usually not enough to trigger an oil pressure warning light.
If you have changed the engine oil in the last six months or so, and have not done over about 7000 miles since then, oil degradation should not be contributing to the low pressure problem.

If the oil pressure gauge check confirms low oil pressure I suspect, on further investigation, that you will find a problem with the engine's oil pump.

You will need to get your vehicle to a reputable auto service shop to have the oil pressure checked and the problem investigated. Do not drive the car in this condition (except to get it to the repairer). The engine is not receiving sufficient lubrication and you run the risk of expensive engine damage and total engine failure.

Hope all goes well with it. Cheers.

Dec 07, 2009 | 1994 Mercury Topaz

2 Answers

I have a 2000 trooper that burns oil. I let it


If the engine oil light wont go off it might be the damage is done and you need some major engine work .

Oct 03, 2009 | 2000 Isuzu Trooper

1 Answer

Oil light on @ idle


its a high mileage engine.
all you need to do is use a thicker oil and the light will go out at idle speeds.

use a 50w sae valvoline racing oil.
plus stp oil treatment.

do that and that light is all gone.

Aug 19, 2009 | 1999 Volvo S80

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