Too Much Oil in Car Check Engine Light

Last Updated on June 19, 2023 by Ryan

If the check engine light on your car comes on and you suspect that too much oil is causing it, you should first determine if there actually is too much oil in the engine. To do this, open the hood and locate both the dipstick and the fill cap. Pull out the dipstick and wipe off any excess oil with a rag or paper towel.

Then reinsert it all of way back into its tube until it stops. Remove again and check to see if there’s an excessive amount of oil visible on it that wasn’t present before wiping away what was already there; this will indicate that there may be too much oil in your vehicle’s engine. If so, drain some of it out until levels are back to normal according to manufacturer’s specifications for your specific make/model vehicle.

If your check engine light comes on and you suspect that there is too much oil in your car, it’s important to take immediate action. This issue can lead to serious damage if ignored, so make sure to address this problem as soon as possible. You may need to drain some of the excess oil from your car or even change the entire oil filter before the issue is fully resolved.

Keep an eye on your engine light and don’t hesitate to contact a professional for assistance if needed.

Too Much Engine Oil (Dangers and DIY Fix)

What are the Symptoms of Too Much Oil in Car?

When too much oil is present in a car engine, it can cause several issues. The most notable symptom of having too much oil in the car is an increase in the smoke that comes out from its exhaust pipe. This smoke will be thicker and darker than usual due to the excess oil burning off inside the engine.

Additionally, you may notice an unusual smell coming from your vehicle or hear excessive knocking or ticking sounds when driving. Other symptoms include increased fuel consumption, problems starting your engine and decreased acceleration power as well as reduced performance overall. To ensure these issues don’t arise again, make sure you always check your vehicle’s oil levels regularly and top up with just enough to keep it running smoothly!

Will Oil Light Come on If Oil is Overfilled?

The answer to this question is yes. If the oil in your vehicle has been overfilled, it can cause a number of problems and the oil light will come on as an indicator of these issues. Overfilling engine oil can lead to reduced cooling capability due to blocked air passages, excessive sealing ring wear, dilution of motor oil with fuel or coolant from a leaking head gasket, and potentially even damage to the crankshaft bearings due to excess spinning weight.

To prevent any further damage from occurring, it is important that you stop driving immediately and check your dipstick for signs of overfilling if you see your oil light illuminate on the dashboard.

What Happens If You Put a Little Too Much Oil in Your Engine?

If you accidentally put too much oil in your engine, it can cause a number of problems. Too much oil in the engine can increase the pressure levels and make it difficult for the motor to operate properly. It may lead to excessive wear on internal components, such as piston rings and cylinders, which could reduce efficiency and performance.

Additionally, excess oil can lead to an increase in fuel consumption due to inefficient combustion processes caused by high levels of compression. If left unchecked for long periods of time, this could potentially damage other parts such as bearings or gaskets resulting in costly repairs or even complete engine failure.

Will Too Much Oil Throw a Code?

Yes, too much oil can throw a code. When an engine has too much oil in it, the excess pressure within the engine can cause components to malfunction or become damaged, resulting in trouble codes being thrown by the car’s computer system. The most common causes of this are overfilling during an oil change and not properly sealing your dipstick after checking your oil level.

Additionally, if you use motor oils that do not meet manufacturer specifications for viscosity or grade, they may create more friction than usual when used which could also lead to excessive pressure and cause a code to be triggered.

Too Much Oil in Car Check Engine Light


Too Much Oil in Engine Symptoms

If your engine has too much oil, you may experience a number of symptoms such as decreased fuel efficiency, increased engine noise or vibration, white exhaust smoke and/or an excessive amount of oil on the dipstick. Additionally, an overfilled engine can cause damage to internal components like spark plugs and cylinders due to incomplete combustion. To avoid permanent damage it is important to identify these symptoms early and take action if needed.

How Long Can I Run My Car With Too Much Oil

Running your car with too much oil can cause serious damage to the engine. Over-filling your oil tank can lead to blow-by, or leakage of combustible gases from the crankcase into other parts of the engine, which can reduce its performance and efficiency. If you keep running your car with too much oil for long periods of time, it could even cause catastrophic engine failure.

Therefore, it is best not to run a car with too much oil for any extended period of time and check your levels regularly.

Symptoms of Too Much Oil in Diesel Engine

If you think your diesel engine has too much oil, look out for symptoms such as increased or decreased engine performance, hard starting, black smoke from the exhaust pipe, and a distinctive smell of burning oil. Additionally, if there is an excessive amount of oil in the crankcase it can cause the engine to overheat due to reduced cooling capabilities leading to further damage. If any of these signs are present it’s important to take action quickly and have your vehicle inspected by a professional mechanic.


In conclusion, it is important to check your car’s oil level on a regular basis. If you find that there is too much oil in the engine, it could cause serious damage and result in the Check Engine light coming on. Fixing this issue requires draining some of the excess oil from the engine and replacing it with fresh oil.

This will ensure that your vehicle runs smoothly and safely for years to come.


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