The engine fault light is always on, what is the reason?

Engine indicator refers to the indicator light used to show the working condition of the vehicle's engine. The indicator light is used to show the working condition of the vehicle engine, when the key door is opened, the vehicle self-test, the indicator light is lit and automatically extinguished, if it is always on, it means that the engine of the vehicle has a mechanical failure and needs to be repaired.

First, use a fault decoder to check whether the sensor is damaged.

The reason why the engine fault light is on 1, the combustion state is not good, the engine knocks 3, the fuel quality is not good, the inside of the engine cylinder is not clean, there is deposited carbon 5, the computer can not obtain the engine data, the fault light is on, can the car be opened? The engine fault light is on, it may be that the fuel pump does not pump oil, and the car cannot be started, and it cannot be driven directly; It is also possible that oxygen is transmitted.

The knock sensor is installed in the middle of the engine block, and the four-cylinder engine is installed between the 2nd and 3rd cylinders, or one in the middle of the 1st and 2nd cylinders, and one in the middle of the 3rd and 4th cylinders. Its function is to measure the degree of engine shake, and to adjust the ignition advance angle when the engine detonation.

Hello, your engine fault light is one of your engines, the accessories are damaged, it is recommended that you go to the repair shop to find the staff to use the computer to help you detect it, I hope my answer will help you.

There must have been a faulty engine.

1. The sensor is damaged, the contact is poor, or the signal is interrupted; 2. Poor engine maintenance; 3. The quality of fuel and oil is not good; 4. The combustion of the mixture is insufficient; 5. Spark plug failure, ignition coil failure; 6. The fuel pump is faulty and the oil circuit is blocked; 7. The air conditioner filter is blocked.

The specific situation is analyzed as follows; 1. Sensor problems; The sensors mentioned here include water temperature, crankshaft position, air flow, intake air temperature, oxygen sensor, etc., when these sensors are damaged, poor contact or signal interruption, the ECU of the car can not accurately obtain the engine data, at this time it will cause the engine fault light to turn on. 2. Maintenance problems; Poor engine maintenance is the most common cause of engine failure to light up. We know that the vehicle has a certain maintenance cycle, if the owner does not maintain on time, coupled with bad driving habits, then it will increase the burden of engine operation, and finally can only remind you through the fault light to care about your car 3, oil quality problems; The oil quality here includes fuel and engine oil, we know that the fuel filled by the car is generally marked, and the engine oil is also semi-synthetic and fully synthetic, the manufacturer will generally recommend the owner to use which grade of fuel, which type of engine oil, if the owner does not add as required, it will cause wear and tear of the engine in the long run, and the fault light is not to blame.

Poor combustion of the mixture; The failure of the spark plug, ignition coil, fuel pump, and oil circuit blockage of the engine will cause poor combustion of the engine mixture. Poor combustion of the mixture is caused by the problem of engine carbon deposition or knocking, and these will eventually be detected by the engine's oxygen sensor and reported to the ECU, which will naturally turn on the fault light to warn of the intake air intake problem; When the engine burns, it needs to take intake, the air filter element is very important in this process, if the air filter element of the car is not clean, it will affect the air intake of the car if it is not cleaned regularly, and it will be blocked for a long time, and if it is serious, it will cause the engine failure light to turn on. The extender can also cause the engine failure light to come on.

The most common of these is turbocharger damage, and at the same time, the vehicle also has oil leakage, large oil consumption, and power loss.

The engine indicator light on the dashboard of the car indicates that the engine failure alarm of the car. There are many reasons for a car engine failure alarm, including poor air-fuel ratio, spark plug ignition failure, dirty engine intake valve, blocked air filter, oil deterioration, and so on. Severe engine failures can be accompanied by over-temperature cooling water and oil alarms.

If the fuel is not good, it will also cause the engine to fail, and the light will always be on, check it to see what the fault is causing it?

The reasons for the car engine fault light to be always on are as follows: 1. Bad combustion state: the engine combustion state is not good is the main reason for the engine failure light, in the design of the car, in order to ensure that the engine is in good working condition and ensure the normal working life of the engine, an oxygen sensor is designed and installed on the engine to monitor the combustion state of the engine.

2. The inside of the engine cylinder is not clean, and there is carbon deposit: after a certain period of use, some carbon deposits will accumulate inside the engine, which may lead to changes in the engine design parameters; At the same time, the nature of carbon deposition is unstable, and it is easy to accumulate heat, which leads to disorderly ignition of the engine, causing engine knocking, so the fault light is always on.

Engine failure lights can be divided into three situations:

1。The car cannot be started, which may be caused by the failure of the fuel pump or ignition parts and the game, and you need to directly ask for help;

2.The fault light is on, but there is no abnormality in driving. This may just be a sensor failure that requires a low-to-medium deceleration to a nearby repair shop;

3.The fault light is on, and the vehicle can drive, but there are symptoms such as violent shaking and insufficient acceleration, and you need to wait for rescue.

If it doesn't affect the oil, or the oxygen sensor, you can add two cans of general additives, or additives of the National VI standard, and you can eliminate the lights by running Wang Yuhan. The car of China VI is more picky about oil, and the quality of the oil is slightly poor, so the sensor is easy to detect the problem and turn on the light.