What s going on when the engine fault light is on?

The reason why the engine failure light is on.

1. 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.

2. 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.

3. The inside of the engine cylinder is not clean, and there must be some carbon deposits inside the engine after a certain period of use, which will cause the engine design parameters to change, and its properties are unstable and heat is accumulated, and the accumulated heat will lead to disorderly ignition of the engine, thereby causing engine detonation. In this case, the engine fault light is also illuminated.

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.

The engine fault light is on, indicating that there is a problem with the engine, which is a warning to you, and it is best to drive to a 4S shop or maintenance point to check it.

Obviously, the engine is malfunctioning. This is relatively intuitive, what is the specific reason? It needs to be sent to a repair shop or a four-S shop for testing.

My car is in a similar situation as you said, troubleshooting after replacing the rear oxygen sensor. After disassembling the oxygen sensor (in front of the exhaust pipe, it is easy to find it from the middle of the front and rear doors), 4 plugs, a group of 2 each, check with a multimeter, both groups are through the sensor is basically good, and one group needs to be replaced after the oxygen sensor. Roadside repair shops have replacements, but to.

Many people are scared when they hear the engine failure light on, thinking that something must be a serious problem. What does this engine failure light look like? Under what circumstances will an alarm be raised?

The car engine fault warning light is a popular name, and the real name should be the engine emission fault light, which is a faucet-like logo. This light alarm does not mean that the engine is broken, but only that the exhaust emissions are abnormal and may exceed the standard.

The fault light is on, and the most direct problem is that the engine has too much carbon deposit, resulting in unqualified exhaust emissions. The cause of excessive carbon deposition may be that the quality of the oil used regularly is not very good, the maintenance is not done on time, or it may be related to the usual driving habits. In this case, what we need to do is to clean the carbon deposit, and after the removal is completed, the exhaust emissions are qualified, and the fault light will not be lit.

Vehicle carbon deposition is an old topic, and we can also slow down the generation of carbon deposition by paying more attention when we usually use the car, such as going to regular gas stations to refuel and regularly use fuel additives to reduce idle time. It does not mean that the engine failure light of the vehicle is on to mean that there is too much carbon and needs to be cleaned, if you feel that the vehicle is shaking, insufficient power, etc., it is also a warning that you need to clean the carbon deposit. The emission failure light is not only related to carbon deposits, but also the possibility that there is a problem with the oxygen sensor, in which case we only need to replace the oxygen sensor to solve the problem.

We see a yellow faucet-like logo, which is the engine fault light. The engine fault light is on, but the system has detected that the vehicle's exhaust emissions may be unqualified. There are many reasons here, it may be caused by carbon deposits, or it may be the failure of the oxygen sensor, so we have to go to the 4S store for an inspection to determine the specific cause.

If the engine fault light is on, there is no abnormal noise in the cabin, there is no other abnormal prompt in the instrument, the vehicle power is not affected, and the gearbox upshift is not affected, you can continue to drive and stop the 4S shop for further investigation, because the intake and exhaust may cause the engine failure light to be on, and the specific problem is analyzed in detail.

This is commonly referred to as the yellow engine fault lamp, also known as the EFI system fault lamp. As long as there are no special abnormalities in the engine power and sound, it can still continue to drive. Because there is a substitute bug program in the ECU.

Once one of the many sensors has a sensing failure, in order to ensure the normal operation of the engine, the ECU will replace the parameters of the faulty sensor according to the pre-set backup parameters to avoid vehicle breakdown. For example, if the water temperature sensor is broken, the ECU will use a backup value of 80 degrees as the control parameter for fuel injection and ignition. So it can be opened, but it must also be repaired in time.

There are two situations when the engine fault light is on: the yellow symbol light indicates that the engine is faulty, but the fault does not affect the normal operation of the engine, but it must be maintained. The red symbol light indicates that the engine has a serious fault, and it needs to be repaired immediately under normal circumstances, if it is in special road conditions, it can be used in an emergency, but it is necessary to pay attention to the working status of the engine at all times.

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 vehicle fault light is on, which can be solved by the positive and negative power supply.

With the development of automobile gasoline engines in the direction of high speed, high compression ratio, high power, low fuel consumption and low emissions, the traditional ignition device has not adapted to the requirements of use.

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 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 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.

An engine is a machine that can convert other forms of energy into mechanical energy, such as internal combustion engines (reciprocating piston engines), external combustion engines (Stirling engines, steam engines, etc.), jet engines, electric motors, etc. For example, the internal combustion engine usually converts chemical energy into mechanical energy.

The machine fault light is always on, and I went to the repair shop to check that the fuel correction system is ** thin, indicating that there is a problem with the exhaust. Focus on the oxygen sensing in the exhaust part (there are generally two. Check whether it is normal first, and if it is normal, then see whether the three-way catalytic converter is blocked).

According to the ** checked by the driving computer, troubleshooting, it may also be a problem with the ignition coil.

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

It may be that there is a problem with the engine powertrain, but there may be many kinds of troubleshooting and reasons for the problem, such as the battery is not lit, etc., you need to go to the 4S store to troubleshoot, but the main reasons are as follows:

The combustion state is not good;

engine knocking;

Poor fuel quality;

The internal cylinders of the engine are not clean and there is carbon deposit;

The computer cannot obtain engine data;

It is useful to say so much, because it is difficult for individuals to judge, and they need to go to the 4S store to connect to the computer for them to see, we can't judge, don't delay, go to 4S as soon as possible

There must be a problem before it is lit, hurry up to the car repair shop or 4S shop to let the professionals solve it, here can not solve the basic problem!

That's a problem with the engine, right?