Question about 2002 GMC Envoy

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Loses power engine light one and off displays oil pressuer low and turn off your engine

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1st check oil level ,top up if necessary. If level ok, most likely a faulty oil pressure sender, replace and recheck.

Posted on Dec 28, 2013

Testimonial: "yes oil level is good I changed oil pressure sensor it goes on from time to time sometimes it displays the speedometer sign with it"

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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.

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1 Answer

Low oil pressure


if you ran out of oil and you now can hear knocking sound comming from the engine then it time to get it checked by a mechanic

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1 Answer

Oil light comes on, loses power, stalls, restarts but engine very rough, oil level is fine but oil is very hot, smokes


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1 Answer

2007 magnum se 2.7 v6 wont turn over


Sounds like the engine is toast.
The warning light means the oil pressure has dropped below 10psi which can mean the engine is low on oil, or that something has happened to the oil pump or other components.
The crank bearings may be seized from lack of oil.
See if you can turn the crank by turning the alternator pulley.

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1 Answer

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Have you checked the oil level in the engine ?
The oil warning light is for low oil pressure - but it could come on if the engine is low on oil too.

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1 Answer

I have a 2004 jeep liberty, when the vehicle is at a stand still the oil light comes on, as I start to drive and continue to drive the light goes out. Comes on again at times when standing still,...


1st thing to try is to replace the oil sinding unit, if the problem percets then have someone install a manuel oil pressuer gauge to check the oil pressuer at hot idle if oil pressuer is less then 10 psi at hot idle then replace the oil pump.

Aug 28, 2011 | 2004 Jeep Liberty

1 Answer

Low oil pressuer light comes on when at idol


You'll have to determine the actual oil pressure. We use a mechanical gauge fastened to one end of a 3' length of high pressure hose. An appropriate fitting at the other end of the hose is threaded into the opening that the oil pressure sender is removed from. Run the engine until warm and read the gauge with the engine idling. If the oil pressure is below 7 lbs the engine probably has seriuos problems. If the oil pressure is higher than that you probably have a bad oil pressure sender. Otherwise you can just change the sender and see if that corrects your problem.

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1 Answer

Where is the oil pressuer switch located


It is located near the oil filter.


Turn the key to the "ON" position and depress the accelerator pedal to the floor within 5 seconds. Turn the key back on and the light should blink and then go off.
This will help. Thanks please keep updated. please do rate the solution positively .thank you for using fixya

Mar 20, 2010 | 2002 Chevrolet TrailBlazer

1 Answer

Oil pump flickering on 93 Camry


Acheep way to find out is had some power punch to the oil buy a quart for 6 bucks drain a quart of oil and put it in it the light does not xome on then it's fixed. if it still comes on check the pressuere sending unit it could be defective to.

Jun 16, 2009 | 1993 Toyota Camry V6

1 Answer

My car will turn over but then kills right away.low oil pressure


Well when your computer sees that the oil pressure is too low it will shut the fuel pump down as a safety precaution. What could be causing the low oil pressure could be a few things. You could just be low on oil (5 qts is standard on most vehicles), your piston rings could be going bad causing you to lose compression, your head/valve cover gaskets could be breaking down which could cause you to lose compression, and your valves could be covered in carbon build up and not seating completely.  Try this; put a quart of oil in and try running some 44k power enhancer through your engine. If you are still getting the low pressure light it could be a mechanical problem such as your rings, gaskets, Etc.
The high idle could be a number of things. Your Throttle cable could be adjusted a little short, your Engine Coolant Temp sensor could be constantly reading that your engine is cold which would then dump more fuel into your cylinders. Your O2 sensor could be going out therefore constantly reading that there is too much oxygen in your exhaust and telling your computer to dump more fuel into the engine. Its a long shot but you may also have a timing problem.... Good luck and if there is naything else I can help with just let me know...

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