Have you ever been in a situation where the check engine light turns on unexpectedly, leaving you worried how bad the situation is? Or perhaps, you got your oil changed recently, and the light turned on within a few hours.

What will you do when the check engine light turns on?

The check engine light turning on is one thing that creates fear and panic among vehicle owners. This is particularly true when the oil has recently been changed. The fact is that the problem might be anything as catastrophic as a crocked engine or something as small as a blown fuse; even so, a properly performed oil change should not set off the check engine light.

However, as the case may be, there is no need to panic. Just take a chill and read on.

What Causes Check Engine Light To Come On After Oil Change

One of the things to bear in mind is that the moment the check engine light turns on, it signifies that there is an urgent issue; therefore, you should never disregard it, especially if it appears shortly after an oil change or flashes on and off and the reason why the check engine light turns on after an oil change is very glaring.

Most automobiles are programmed to turn on the check engine oil light when an oil change is necessary, so you don’t even have to keep a record of your mileage yourself. Hence, here are the causes of check the engine light after an oil change.

1. When The Oil Cap is Fitted Backward

Complications arise if too much oxygen enters the engine without being noticed by the ECU. This is exactly the case when certain oil lids are put incorrectly. Due to a vacuum leak caused by the cap not completely sealing, the engine runs lean. This is why, following regular maintenance, the check engine light comes on. This is why the check engine turns on after an oil change.

It is explicit to know that an ECU will not be deceived by a lean situation because it is continually looking for faults. It assesses how successfully the fuel it adds is utilized using a sensor in the exhaust. If you like, you could say it’s double-checking its computations. An oxygen sensor is the type of exhaust sensor that it uses.

In addition, the ECU has a range of readings from the car’s oxygen sensor that it will accept in relation to the amount of oil applied. When the oxygen sensor readings are thrown off as a result of the oil cap being installed backward, the ECU transmits an alert by keeping the check engine light illuminated.

2. When The Dipstick Isn’t Properly Positioned

The dipstick fits snugly in the dipstick tube, so when the dipstick is inserted, an O-ring produces a seal. Unmetered air will be allowed to enter the engine if the dipstick is left off. Internal engine components such as cylinder walls, pistons, and valves may be harmed as a result of this. Hence, this causes the check engine light to stay on to alert the vehicle owner.

3. Lack Of Enough Oil Pressure

Changing the former oil with new oil does not give the oil pressure gauge enough chance to read correctly, resulting in the check engine light remaining illuminated because your car believes it lacks sufficient oil.

Read More: Causes of Low Oil Pressure Warning Light

Other Possible Reasons For Check Engine Light Comes On

4. Overflowing Of Oil

Sluggishness, malfunctioning, exhaust smoke, and failure of the engine to start, can all be symptoms of excessive oil in the engine. Although an excess of oil is bad, it is not as bad as an insufficient supply. You clearly don’t want to have excessive when it comes to oil-related difficulties.

5. The Improper Oil

When old oil is accidentally changed with the wrong quantity, density, or quality, it may provide insufficient lubrication or properly releasing energy. Subsequently, the oil will heat too much, which will keep the check engine light on.

6. Oxygen Sensor Failure

If one of the oxygen sensors in a car or other vehicle fails, it will be unable to keep track of how much oil is being burned by the engine. As a result, the check engine light remains illuminated.

7. A Faulty Catalytic Converter

A malfunctioning circuit will almost certainly keep the check engine light on because when it fails, the car’s fuel mileage suffers greatly and the engine overheats. As a result, the check engine light remains illuminated to alert the vehicle owner.

8. The Fuel Problem

Even though the oil has been replaced, if the automobile has a clogged gasoline filler or a defective pump, the check engine light may illuminate.

9. Faulty Airflow Sensor

The check engine light will illuminate if the MAS (Mass Airflow Sensor) fails to detect how much air is creeping into the engine as a result of a blocked or worn air filter.

Is It Safe To Drive With Check Engine Light On?

If the system is suffering low pressure owing to a faulty oil pump, for example, the check engine oil light will illuminate. This could indicate that the engine’s oil supply has run out or that the system isn’t circulating enough oil to keep it oiled. If you keep driving, your engine may stop and cause significant damage.

Hence, it is not safe to drive with a check engine light on. It is explicit to note that immediately after the check engine light on, you should stop driving in order to avoid any danger.

How to Reset Check Engine Light After Oil Change

There are several helpful strategies available to ensure that the check engine light does not remain illuminated for an extended period of time. Some of the most essential recommendations that will help you to get rid of check engine light after oil change are detailed here; read and learn.

1. Replace The Oil Filler Cap In The Clockwise Direction.

One of the most effective ways to make the check engine light go off after oil change is to replace the oil filler cap in the clockwise direction. The oil filler cap is designed to fit clockwise rather than backwards, and this is the only way to fix a backwards-fitting oil filler cap that keeps the check engine light on. Simply remove the oil filler cap and replace it properly, and the problem should be resolved.

2. Completely Fit The Dipstick

When a dipstick is incorrectly seated, it will cause the check engine light to stay on all the time, all you have to do is open the hood, locate the dipstick, and make sure it’s properly seated on its dipstick tube. The check engine light should switch off automatically at this point.

3. Change The Faulty Oxygen Sensor

When a defective oxygen sensor is the cause of a persistently blazing check engine light, the only remedy is to replace it with a new one.

4. Fix The Faulty Catalytic Converter

If the issue is exacerbated by a defective catalytic converter, take your automobile to a mechanic and have the defective catalytic converter repaired.

5. Allow The Oil to Circulate For Some Time

Wait a few minutes for the oil pump to thoroughly circulate the fresh oil in the engine, since insufficient oil pressure might cause the check engine light to illuminate. It will provide sufficient opportunity for the oil pressure indicator to read the appropriate oil pressure.

In Conclusion

If the check engine light remains on after an oil change, it could be due to a backwards-fitting oil filler cap or an incorrectly positioned dipstick. Aside from that, problems like the improper oil, a defective oxygen sensor, a defective catalytic converter, and so on could be the cause.