HelloI have sonata 2016 sport, americanEngine is...

Dear customer, regarding the problem that your car is facing, which is the appearance of a (check) bulb, this is due to reasons including:
The presence of a problem or damage to the oxygen sensor in the car-
When there is a malfunction in the oxygen sensor in the car, this will cause the engine light to appear when traveling at a speed of 100 to 120 km per hour. for deposits emanating from the engine. In some cases, you may notice that the Check Engine bulb turns on and off, only here it needs cleaning, or there may be a defect in one of the wires and connections of the car computer.
 There is a problem with the spark plug- 
When there is a problem in one of the car’s spark plugs, and as a result of the fuel not burning properly, it will lead to a number of symptoms and engine malfunctions, including weak car torque and the appearance of the Czech Check Engine bulb.
 There is a malfunction in the air sensor in the car- 
When there is a malfunction in the air sensor in the car or it is damaged, a group of symptoms will appear in the engine, the most important of which is the appearance of the Check Engine mark. The function of the air sensor is to measure the amount of air entering the engine, in order to know the amount of fuel needed to run it in case Good and in excellent condition.
To solve the problem, you must take the following steps:
You have to do a pre-start of the car computer and clear the malfunctions stuck in it, then the engine bulb will disappear and may not reappear in the dashboard, but if there is a problem inside one of the sensors, it will reappear after a day or two to five days or more.
 - When the Czech Check Engine bulb reappears, despite the previous step here, the car must be checked with fault-diagnosing devices. In most cases, the problem is in the oxygen sensor (the gasket) is dirty or carbureted and only needs to be cleaned with one of the cleaning sprays available in the market.
As for the presence of a malfunction P0010, which is one of the fault codes that indicate a malfunction in the car, and it appears when the computer is checked with the OBD-II device.
The vehicle's variable valve timing system improves engine performance and fuel efficiency.
There are some common causes for code P0010 to appear that could be the source of the problem including the following:
- The viscosity of the engine oil is very high and hinders the movement of the camshaft. The oil flow to the engine must be constant to make it run smoothly.
 - The camshaft gear timing is defective or stuck, which leads to code P0010.
 - A defect in the VVT ​​oil flow control valve, which is dirty and needs cleaning, or is completely damaged.
Check the wires connected to the VVT ​​valve to the PCM and check for corrosion or any loose wires.
After that, check the camshaft sensor, crankshaft and VVT valve, where you can wipe them and clean them, if the damage is severe, they must be replaced.
It is also a good idea to make sure that the VVT ​​valve is working properly by checking the voltage via the OBD2 reader or via the multimeter.
If the readings are higher than the recommended values, it should be replaced.
Clear the malfunction code and drive the vehicle and retest to see if it still shows code P0010 again.
If the code appears again, you may need to replace the camshaft gear or the shaft itself.