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

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 engine data, at this time it will cause the engine failure light to turn on.

Maintenance Problems Poor engine maintenance is the most common cause of engine failure to light up. We know that vehicles have 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 that you should care about your car.

Oil quality problems here include fuel and oil, we know that the fuel filled by the car is generally marked, and the oil is also semi-synthetic and fully synthetic, manufacturers generally recommend the owner to use which grade of fuel, which type of oil, if the owner does not add as required, it will cause wear and tear of the engine in the long run.

Hello, the car engine failure light is on for the following reasons:

1. The inside of the engine cylinder is not clean and there is carbon deposit.

After a certain period of use, there must be some carbon deposits inside the engine, which itself will lead to changes in the design parameters of the engine, and at the same time, its properties are unstable and heat is accumulated, and these accumulated heat will lead to disorderly ignition of the engine, thereby causing engine detonation. In this case, the engine fault light is also illuminated.

What is the reason why the car engine failure light is on.

2. The combustion state is not good.

Poor engine combustion condition is the main reason why the engine failure light is on. 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.

3. The fuel quality is not good.

Many riders who find that the engine fault light is on have a feeling: that is, the engine fault light suddenly turns on after adding a tank of fuel. Because the engine has requirements for the quality index of oil, especially as the requirements for the engine are getting higher and higher in various specifications, the quality index of the oil is also getting higher and higher.

The engine fault light is on the solution.

1. Clean the engine.

Once the engine failure light is on, the owner should clean the engine in time, and there are currently two correct cleaning methods:

1) Go to the repair shop to clean the carbon deposits with a special cleaning agent.

2) Clean the entire fuel system with good fuel additives, including removing carbon deposits in the cylinder.

2. Add higher grade gasoline.

After the engine cleaning, because the compression ratio of the current automobile engine that meets the national IV emission standard is generally above, this kind of car is not suitable for long-term gasoline below 95. In order to keep the engine in good working condition, the owner can choose to add 95 or 97 gasoline, which can usually solve the problem of the engine failure light on.

3. Improve fuel quality.

Since the domestic fuel cannot meet the requirements of the current high-efficiency engine for the time being, it is necessary to improve the quality of the fuel by yourself. For example, using good fuel additives to improve the cleanliness level of fuel should be the best way.

The hazard of an engine failure light on.

After the engine fault light is on, there are always some abnormal states, if not solved in time, it is usually accompanied by the following problems:

1. The temperature of the combustion chamber increases and the wear intensifies, which may lead to early damage to the engine;

2. The engine noise increases, affecting the comfort of driving and riding.

3. Increased fuel consumption of automobiles, waste of petroleum resources and RMB resources;

4. The engine burns engine oil;

5. The quality of automobile exhaust gas deteriorates and pollutes the environment;

1. Oxygen sensor failure. If the oxygen sensor is damaged or the sensor plug is damaged or loose, the mixture will be too thin or too thick, which will cause the fault light to turn on.

2. The quality of gasoline is poor and not up to standard. Generally, it is because of the addition of poor quality gasoline at non-standard gas stations, resulting in insufficient combustion of oil-gas mixture when the engine is working. At this point, the dashboard of the car will light up yellow.

3. Spark plug carbon deposit. Excessive carbon deposition will cause the ignition coil to reverse breakdown, which in turn will lead to the failure of the ignition coil, causing poor ignition and incomplete combustion. At this point, the fault light will also turn on.

4. The engine lacks cylinders. The lack of cylinders in the engine will also be accompanied by the following phenomena: high fuel consumption, black smoke, weak acceleration of the car, serious shaking, and increased noise. At this time, the fault light will also turn on.

The reasons for the fault light on: 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.

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. pressurization issues; Intake booster lines and turbochargers can also cause engine failure lights to illuminate.

The most common of these is turbocharger damage, while the vehicle can also experience symptoms such as oil leakage, high oil consumption, loss of power, metal noise, and blue or black smoke from the exhaust pipe. 7. Exhaust problems; Rear oxygen sensor, three-way catalytic converter, exhaust camshaft and bearing.

Hello 1Phenomenon: During the driving of the car, or the moment the car is ignited, the car engine fault light on the dashboard lights up, usually red or yellow, once lit, it will not disappear automatically in most cases, and will disappear automatically in a few cases, which is the so-called engine failure light on.

The surface reason for the engine failure light is 1, the combustion state is not good, and the poor combustion state of the engine is the main reason for the engine failure light.

The fault light of the engine is on, indicating that there is a problem with the engine, and the computer has detected an abnormality, so it prompts that the fault light is on, and you should go to the repair shop for inspection and maintenance.

Hello, the fault light is on, it is recommended to go to the repair shop to check it, I hope it can help you, hope.

There are usually the following reasons for the engine failure light: 1. The engine failure light is not in good combustion state, and the poor combustion state of the engine is the main reason for the engine failure light. 2. There are usually three situations of engine knocking:

The first case: the car is weak; The second case: the car is weak and the engine noise is too loud; The third case:

There is a noticeable knocking sound. In the first case, there is an engine failure.

When the engine is running, the fuel injection of the fuel injector to the cylinder is atomized, and the atomized mixture meets the cold cylinder wall is condensed on the cylinder wall, which is not conducive to the ignition combustion of the engine.

If the temperature of the engine wall is very high, the mixture enters the cylinder and encounters the wall of the boiling soup is not condensed and gasified, and the mixture gasified at high temperature is conducive to the combustion of the mixture, which is conducive to the smooth and normal operation of the engine.

Engine shaking means that the mixture inside the cylinder is not completely combusted, the incomplete combustion of the mixture will be discharged through the exhaust valve during the engine exhaust process, at this time there is an oxygen sensor installed on the exhaust pipe channel, his function is to check the oxygen content in the exhaust gas discharged, the more fully the mixture is burned in the cylinder, the less oxygen is contained, on the contrary, the more, the oxygen sensor uses this working principle to detect and convert the electrical signal that the computer can identify to the engine control computer, and the computer then according to the set software program, The parameters of the engine working state are collected by each sensor on the engine and sent to the ignition system after correction and calculation, and the work instructions of the fuel injection system are corrected, and these systems correct the working parameters to complete ignition and fuel injection after receiving these work instructions, and the engine has entered the work of ignition and combustion again at this time, so that the work is repeatedly adjusted. When the computer receives the parameters of the oxygen sensor after the exhaust emissions seriously exceed the national legal standards, the internal program of the computer can not be corrected to the standard range, at this time, the engine control computer will send a warning light (yellow pollution light on) through the instrument to remind the owner to the maintenance station to check the cause of the engine pollution emission lamp.

1. Identify the cause of the failure. For diagnostics of such faults in which the engine does not start, the battery should be tested first. It is necessary to find out if the engine does not start because the battery is insufficient.

2. Detect ignition timing. Timing belt slippage is the root cause of the failure that there is no electric spark and the engine cannot start.

3. Detect the starting system. For faults such as engine failure, the first thing to do is to detect the circuit in the engine starting system. From the perspective of the most basic composition, the mountain distribution circuit of the starting system generally includes the following basic parts, that is, the battery, the starting motor and the cable connecting these components.

Of course, in addition to this, ignition switches, starter relays or solenoid coils, as well as in-vehicle anti-theft systems, are also important components of the starting system.

4. Detect the quality of electric sparks. Once the circuitry of the starting system has been tested and proven to be fine-tuned, attention should be focused on why the engine is not working. Generally speaking, the ignition system of the engine is tested first, which is also the easiest inspection job.

In early ignition systems, you could easily remove the ignition coil and use a spark detector to detect if the spark was normal. When choosing an EDM detector, it is preferable to have an adjustable detector rather than a fixed design, as it allows you to adjust the detector to a smaller gap so that you can tell if there is no spark at all, or if there is a spark but it is weak.

5. Detect the fuel system. The diagnosis of the fuel system can be divided into two parts: the diagnosis of the fuel supply system and the diagnosis of the injector circuit system.

The fuel supply system can be detected by measuring the flow and pressure of the fuel. The best way to measure fuel flow is to inspect the line when there is a load in the fuel supply line.

The reasons why the engine fault light of the car is on are: 1. The sensor is damaged, and the engine fault light is on due to poor contact or signal interruption. 2. Engine failure caused by poor engine maintenance.

3. The poor quality of fuel and oil causes the engine to work abnormally, which in turn causes the engine fault light to turn on. 4. The spark plug failure, ignition coil failure, fuel pump failure, oil circuit blockage and other problems of the engine are caused.

The reasons why the engine fault light of the car is on: 1. The sensor is damaged, and the engine fault light will be turned on when the contact is poor or the signal is interrupted. 2. Poor engine maintenance is the most common cause of engine failure.

Therefore, it is recommended that the car should be maintained on a regular basis and maintain good driving habits, otherwise it will increase the burden on the engine operation. 3. The quality of fuel and oil is not good, if it is not added as required, it will cause wear and tear of the engine in the long run, and then cause the engine fault light to light up. 4. The poor combustion of the mixture is caused by the failure of the spark plug, ignition coil, fuel pump, oil circuit blockage and other problems of the engine, so that the engine fault light is on.

If the combustion of the engine mixture is not sufficient, and the mixture in the cylinder is too thick, the car will have symptoms such as knocking and shaking. When it is too thin, the car will have a weak acceleration. 5. Clean the air conditioning filter of the car regularly, otherwise it will affect the air intake of the car, and it will be blocked for a long time, and the engine failure light will be lit up in serious cases.

Note: When the engine fault light is on and the vehicle starts to shake, you need to stop immediately and call the tow truck to wait for rescue.