Oil Light Comes On and Off [But Oil is Full]

If your oil light is on while you are driving, stop and inspect the issue. You may need to stop driving if your oil light goes on. 

This article will examine some of the causes of oil light switching on and off. 

Why does your car’s oil light come on?  

Low oil pressure is what causes your oil light to flash. Low oil pressure happens when the pump is not providing enough oil to an engine. Low oil pressure prevents oil from flowing through the engine to lubricate its components. 


A majority of cars have an indicator of low oil pressure on the dashboard. This is the oil pressure gauge It looks like an old fuel container with oil drips from the tip. This is different than an oil life monitor This tells you how long your oil will last.

It’s a sign that your engine’s oil pressure has dropped. There are many reasons this can happen. 

Here are 6 Things to Consider when Oil Warning Lights Start Coming On 

Low Oil

Low fuel is indicated by a flashing oil light. Check the oil level immediately after you turn off the engine.  

Here are some ways to check the fuel level of your vehicle:

  1. Wait for the oil to cool before turning off the engine. Don’t check engine oil with the car running.
  2. Use a Dipstick to determine the model of your car. Use a damp cloth to wipe it off and place it in the fuel tank. 
  3. The dipstick can be used to check the oil level. 
  4. You will soon run out of oil if you have very little oil on your dipstick. 

Low oil pressure means that you should immediately refill your tank. Overfilling your tank can cause low oil pressure. This happens because oil from the sump comes into contact with the crankshaft. Variable oil pressure can be caused by bubbles in the car’s oil. 

Oil Pump Doesn’t Work 

If the oil light on your oil pump turns on, it means that your oil pump isn’t delivering enough oil for the moving parts like the pistons, bearings, camshaft, and camshaft.  

How to tell if your oil pump has failed: 

  1. Your oil pump may be damaged if you hear the engine clattering from moving parts. This is because oil flow slows down due to oil sludge buildup and failed pumps. 
  2. Experience engine overheating. 

Your ability to meet the above criteria does not mean you will be successful. oil pump is damagedThey are not signs of a damaged oil-pan. An increase in friction can cause engine damage. It is important to have your oil pan checked by a mechanic. This could lead to the oil light not turning on.

Clogged oil filter 

After the oil has left the pump, it goes to the oil filter for filtration. The oil filter removes impurities from oil, which can build up over time. It also keeps your engine clean. Oil can blockage or cause low oil warnings by clogging.

Clogged Oil Filter 
Credit: Quora

How to tell if your engine oil has gone rancid: 

  1. Insert a dipstick inside your oil tank. 
  2. Examine the dipstick. Oil should be clear and slightly runny. 
  3. Oil that is extremely thick, dark and sticky to the touch should be replaced. 
  4. You should check your oil filter as it may contain impurities. 

Check that your oil filter works properly if your oil has many undesirable impurities.

Leakage Oil

Low oil pressure could also be caused by oil leaking. Oil leakage can be caused by internal factors like broken pistons or damaged head gaskets. Worn-out oil filters, oil filter wear, loose oil filler caps and many other factors. Oil leaking from your vehicle’s engine is likely to be noticed if you see oily patches.


How to tell if your engine oil is leaking.

  1. For a few seconds, start the engine. Make sure that your gas tank has filled up.
  2. You can then move your car to another location and inspect the surface. 
  3. Your fuel may be leaking if it smells like oil. 

Low oil viscosity

Low viscosity oils are thinner and more able to flow. Low oil pressure warnings can be triggered by summer oil with a low viscosity. Low oil pressure can also be caused by high viscosity oils. The recommended oil viscosity is determined by the car’s owner’s manual. You should choose oil based upon its viscosity.

In 15W40 oil, for example, the number before the W indicates the oil’s viscosity at cold temperatures. The number after W, however, represents the oil’s viscosity at hot temperatures. The performance at high temperatures is better if the number after W is higher than the one before it. 

Fault in Oil Pressure Sensor  

If the oil light on your engine is blinking intermittently and you are unable to figure it out, this could be a sign of a problem. An oil pressure sensor/switch may be malfunctioning. False alarms could result from a problem with the wiring of your oil pressure sensor. There are two types of oil pressure sensors in cars: mechanical and electrical.  

Because it is easy to install and maintain, most modern cars have an electronic oil pressure system. However, mechanical oil pressure sensors can be more troublesome and, if damaged or not maintained properly, can cause false alarms. If you continue to receive low oil warnings despite your car being full, contact your mechanic. 


A dashboard oil light warning is a sign that your engine may be having problems. It could be that your oil filter is dirty or that the pump is not working properly. It could be that you are out of gas. Or it might just be a false alarm from your oil pressure sensor. 

You should immediately turn off your engine and examine the problem. Only start the engine if the dashboard oil pressure light isn’t red. Contact your mechanic if you are unable to find the solution. Have your vehicle checked and diagnosed. 

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