Why is the engine fault light on so often?

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.

The engine fault light is always on, how to solve it, the old driver teaches you a trick to easily get it.

There are many reasons why the engine fault light stays on, such as damaged oxygen sensor, engine knocking, damaged water temperature sensor, poor quality of gasoline added, etc. The oxygen sensor is to detect the oxygen content in the exhaust, and the oxygen sensor generally has two, one behind the exhaust manifold and one behind the three-way catalytic converter. The oxygen sensor detects the oxygen content in the exhaust gas and feeds the signal back to the ECU, which then adjusts the air-fuel ratio based on this signal.

Settle. When the engine fault light is turned on, it turns on by itself, and this phenomenon is generally a problem with the engine sensor, which has to start from the perspective of maintenance. An important component - oxygen sensor, generally this phenomenon is caused by the problem of the front oxygen sensor, the abnormal data of the monitored combustible mixing ratio, and the repair shop can be detected and replaced with a computer.

The reasons for the engine fault sign to light up are: 1. Poor gasoline quality will lead to insufficient combustion of the mixture in the cylinder; 2. Carbon deposition in the inlet duct and piston will lead to poor atomization and insufficient combustion; 3. The spark plug is not changed for a long time, and the working characteristics are weakened; 4. Failure of the car sensor.

The engine fault light is not necessarily the engine failure, but more often some parameters exceed the standard value, such as exhaust emissions exceeding the standard, or for some reason the engine fires, etc.

The fault light is not always on, which may be due to the fact that the gasoline oil is not very good and the combustion is not good, resulting in an occasional lack of fire in the engine. Such failures can be replaced with better gasoline. But the specific situation still has to go to the 4S store to test with a special detector, and the specific situation is analyzed. Hope it helps.

Vehicle fault light is generally mostly caused by fuel emission system, you start and extinguish the car when the fault light is on, start, extinguish the car three times after starting the vehicle you observe whether the fault light is still lit, if it is still lit, you need to go to the shop in time to check the fault code, see whether it is the problem of the engine or the sensor failure, or it may be an occasional fault can not be checked in time to the store The fault light is lit, which means that the vehicle has a fault code, at this time, the ECU is not powered on, so the fault code will be recorded.

Thank you Hope.

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.

It is recommended that you go to a 4S shop or repair shop to read the specific fault code with a decoder.

If you don't check, the car can still be driven, but it will cost fuel.

If it feels helpful to you, then give it a go!

Hello, this situation should go to the repair shop with a detector to detect to know what the fault is, if it can be cleared, it will be cleared, if it can't be removed, it depends on what is broken, replace the broken accessories and then clear the fault! Satisfied!

It is highly recommended to go to the auto repair shop or 4S shop to let a professional master take a look, otherwise it will be too late to damage the engine or something.

What's going on with the car engine light on? What should I do?

If the fault light of the engine is still lit after the ignition, go to detect it, read the fault code, and see if the specific fault is in.

The engine fault light is always on, which has been bothering the owner for more than four years, but I didn't expect it to be caused by it.

The engine fault 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.

Engine failure lights are usually lit for the following reasons:

1. Poor combustion state: Poor combustion state of the engine is the main reason why the engine failure light is on.

2. Engine knocking, there are usually three situations:

1) The car is weak. (Some engine fault lights will turn on, some won't) (2) The car is weak and the engine noise is too loud. (The engine fault light will inevitably turn on) (3) There is obviously a knocking sound.

The engine fault light will inevitably turn on) 3. The internal reason why the engine fault light is on:

1) The fuel quality is not good.

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

The reasons for the car engine fault light to stay on are as follows: 1. The gasoline quality is poor and not up to standard. Poor gasoline quality (such as excessive impurities, high gum content, and high sulfur content) will not only lead to insufficient combustion of the mixture in the cylinder and excessive carbon deposit, but also have the hidden danger of blocking the oil circuit and corroding parts (such as fuel pumps, etc.).

It directly affects the concentration of the normal mixture, and eventually leads to the occurrence of the engine fault lamp lighting and the occurrence of shaking. 2. Oxygen sensor failure. The function of the front oxygen sensor is to detect the air-fuel ratio of the engine under different working conditions, and the ECU computer adjusts the fuel injection amount and calculates the ignition time according to this signal.

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. 3. If the air flow sensor or line fails, the engine computer will not get the correct air intake signal, so that the normal fuel quantity control can not be carried out, and then the mixture is too thin or too thick, and the engine cannot work normally, sometimes accompanied by the lighting of the engine fault light.

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.

The car will self-check every time it starts, and while the car is moving, the trip computer will also regularly check the internal parts of the car. As long as the computer detects the fault of the car, it will remind the owner through the warning light on the dashboard, and the owner can know what the fault of the car is through various warning lights, and can also deal with the car fault in time. In the warning light, there is a faucet sign, and it is the engine failure light.

Many car owners think that the engine failure light refers to the warning light of engine failure, so it is very strange why this light is on and the car can still move forward. But in fact, the engine fault light does not specifically refer to the engine failure, basically as long as the sensor fails, and it does not have a special fault light, then the engine fault light will be on. Therefore, it is easy for car owners to see the engine fault light on when driving.

So can it continue to drive after it lights up? This is seen in two ways.

First of all, if the engine fault light is on, but the owner does not feel any difference when driving, and the basic operations such as acceleration and deceleration can be carried out normally, then the car can still be driven. In this case, the car's sensors are generally faulty, but it will not affect the car's driving, at most, the emissions will become higher, and sometimes it will even go out by itself. Don't ignore it, though, and check it out when you have time.

The second is that there is an abnormality in the car. For example, after the engine fault light is on, the car feels weak when accelerating, or the shaking of the car becomes larger, anyway, it is different from the usual feeling of driving. In this case, it is still not recommended that the owner continue to drive, it is better to call for help and tow the car for repair as soon as possible.

Because this kind of fault is generally relatively large, the danger of continuing to drive on the road is very high.

In short, after the fault light is on, the owner has to go to the repair shop to test it, but the specific maintenance time depends on whether it has a big fault.

It is recommended to stop the car immediately to check and restart it to see if the fault exists. If it's red, stop for repairs immediately. If it's yellow, you can keep driving and repair it as soon as possible.

The reason why the car fault light is on:

Vehicle fault light is generally caused by the fuel emission system, when the fault light is on, the vehicle is started, extinguished, started and extinguished three times after the vehicle is started to observe whether the fault light is still lit, or it is still lit to check the fault code in the store in time to see whether it is the problem of the engine or the sensor failure, or it may be an occasional failure, and you can not go to the store in time to check. The engine burns badly, and the engine knocks.

Precautions: 1. Do not drive as usual during driving, and it is best to keep driving at a low speed. 2. Always pay attention to whether the oil gauge alarms, if the oil is seriously missing, it is absolutely impossible to drive. 3. Always pay attention to whether the water temperature gauge (antifreeze) alarms, if the water temperature is too high and driving for a long time, the car breaks down.

The engine fault light is on, and it is usually okay to drive at low speeds with caution if there is no particularly noticeable fault. It may be some minor faults, or there may be no faults (false faults), but if there is an obvious fault in the engine, such as serious abnormal noise, serious shaking, engine smoke, etc., you must not drive on the road, and it is best to contact the repair shop to wait for rescue.

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.

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.

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.

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 engine carbon deposition or knocking problems, and these will eventually be detected by the engine's oxygen sensor, and after being reported to the ECU, the fault light will naturally be lit as a warning.

For your driving safety, please drive your vehicle to the vehicle workshop for inspection as soon as possible.