What should I do if the car trouble light is on?

It is normal for the engine fault light to come on when the car is only connected to the power supply but not ignited. If there is no fault with the vehicle, it will go out after ignition. If there is something really wrong with the vehicle, it will not go out after being ignited. In other words, to see if the vehicle's fault light is on, you need to turn it on and then check again.

The moment you turn on the ignition key, all the fault lights will come on. After about two or three seconds, the other fault lights will go out, leaving only the engine fault light. Some cars will also have the battery light and oil pressure light on, which is normal. These parts with lights on must be on fire before they can self-check, so they will always be on before ignition. After the engine computer self-check finds no fault after ignition, it will go out immediately, which takes about two or three seconds. If there is a problem with the car and it cannot start, it cannot be said that it is because the fault light is on.

The CS75 engine fault light is always on. It may be that the engine is not in good combustion condition and has carbon deposits. In order to ensure that the car engine is in good working condition and maintain its normal service life, an oxygen sensor is installed inside the engine to detect the designed combustion state. If the engine combustion state is not good, it will increase fuel consumption and wear, and it will pollute the environment.

What causes the engine fault light to come on?

1. Our vehicles usually have many sensors, the more common ones are water temperature sensors, oxygen sensors, etc. When the sensors are damaged or have poor contact, the engine fault light will light up.

2. When we usually refill fuel, the fuel we use does not meet the standards, that is, inferior fuel is added, which will trigger an engine fault light alarm for a long time. The more common one is Volkswagen Turbo. If the car is filled with poor quality gasoline, it is often easy to call the police.

3. Many people do not change the air filter very frequently during maintenance, which affects the air intake of the car. In severe cases, the engine fault light will come on.

4. Failure of the engine's spark plug and ignition-related parts will lead to insufficient combustion of the vehicle's gasoline and will also cause the engine fault light to alarm.

The engine fault light is the most common light. If it comes on in actual use, it can continue to be turned on in most cases. There are several other uncommon fault lights on the car. Once they are on, you cannot continue to drive, or you need to stop and check to make sure there are no abnormalities before you can continue to drive. There are oil pressure lights, water temperature warning lights, handbrake lights, and tire pressure lights. Pay special attention to these four lights after they come on. If there is a fault and you continue to drive the car, it may cause major problems. Therefore, you must stop and check immediately. If there is no abnormality, you can continue to drive. If you are not sure, stop on the roadside and call for rescue.

How to prevent carbon deposits in the engine?

1. Fill with high-quality gasoline.

Waxes, colloids and other impurities in gasoline are the main components of carbon deposits, so gasoline with high cleanliness has a weaker tendency to deposit carbon. Unfortunately, the quality of gasoline in our country is still lower than that in developed countries, so we can only make do with the shabby stuff. It should be noted that high label does not mean high quality, that is to say, 97 # oil does not necessarily have less impurities than 93 # oil. The label only represents the octane number of the oil, not the quality and cleanliness.

In order to ensure the cleanliness of gasoline, some car owners add gasoline detergent to gasoline. This can effectively prevent the formation of a carbon deposit layer on the metal surface, gradually activate the original carbon deposit particles and slowly remove them, thereby protecting the engine from damage. However, be careful when adding gasoline detergent. If you add counterfeit products, you will get the opposite effect.

2. Don’t be idle for a long time.

If the idling time is long, it will take longer for the engine to reach normal temperature. After gasoline is sprayed on the back of the valve, the evaporation rate will slow down and carbon deposits will also occur. At the same time, if you frequently drive at idle speed, the air flow entering the engine will be very small, which will weaken the flushing effect on carbon deposits and promote the deposition of carbon deposits.

3. Clean on time

If carbon deposits cause malfunctions, such as idle jitter, difficult starting, excessive idle speed and excessive exhaust gas, cleaning must be carried out. Regular vehicles must also be cleaned every six months or 10,000 kilometers to remove carbon deposits. Some non-removable cleaners can be used for cleaning.