What s going on with the engine failure light suddenly coming on

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 braking system can be divided into human braking system, power braking system and servo braking system. The braking system that uses the driver's body as the only braking energy source is called the human braking system; A system that brakes entirely on the potential energy in the form of air pressure or hydraulics converted from the power of the engine is called a power braking system; A braking system that uses both human and engine power for braking is called.

The reason why the engine failure light is on.

1. The combustion state is not good.

2. Engine knocking.

3. Internal reasons for the engine failure light: (1) The fuel quality is not good. 2) The inside of the engine cylinder is not clean and there is carbon deposit.

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.

1. If the car does not start the ignition, but only turns on the imitation power supply, then the fault light of the engine lights up and then goes off, and at the same time, the water temperature indicator light, battery light, and safety gas bag light of the car will also be lit up and then extinguished, which may be the self-inspection link of the vehicle, not the engine has a problem.

2. The fault light of the engine is on, it may be that the sensor is detecting the emission of the exhaust gas of the car, if the exhaust gas of the car exceeds the standard, the engine fault light will be lit up, and the fault light will be extinguished by itself after the fault light is lit, and the owner does not need to worry too much.

3. If the vehicle is rolled up after starting and the fuel atomization inside the engine cylinder is poor, it will also cause the engine fault light to turn on, and when the temperature of the car rises, the engine will work normally, and the engine fault light will go out.

It may be a fuel problem, and it is recommended to go to the repair station to check if there is no oil change.

Plugged injectors and carbon build-up in the intake valves can also trigger engine failure light alarms. Because there will be impurities in gasoline, they will accumulate at the fuel injector, which will affect the fuel injection of the fuel injector, especially in the cylinder direct injection engine, which will directly lead to engine shutdown and other conditions. The air-fuel ratio of the engine under different working conditions, at the same time, provides signals for the ECU driving computer to adjust the fuel injection amount and calculate the ignition time.

The latter is used to test the working quality of the three-way catalytic converter.

<> add fuel additives, the Volkswagen series is highly incidentious, other car series also have, the vehicle itself has carbon deposits, after adding additives, the driving computer has an adaptation process, which may be lit. Once blocked, the oxygen sensor behind the three-way catalytic converter cannot detect normal exhaust emissions, and cannot compare the data with the front oxygen sensor to light up the engine fault light.

Because the fault light of the engine is lit, it may be the ignition system of the engine, the fuel injection system, the emission system, and the failure of various sensors on the engine, which will lead to the damage of the ignition coil of the engine fault light, but it is usually the ignition coil failure that causes jitter and acceleration weakness, and it can be replaced. There is a more serious valve damage caused by shaking, once this engine will be overhauled, but usually this situation is less, the vehicle yellow symbol of the lamp or not the exclamation mark of the lamp, generally is not good combustion, insufficient combustion, the engine has detonation, or there is carbon deposition and the quality of the added oil is not good, it may also be caused by the ECU can not read the engine data.

The reason for the failure of the three-way catalytic device is that the folk are also said to be poisoned by the three-way catalytic converter, which is to put it bluntly, the three-way catalytic device has been unable to work normally and cannot deal with the harmful gases in the exhaust gas. The failure of some sensor computer boards may also cause the contaminated lights to turn on. There are two oxygen sensors installed in the car, if the oxygen sensor is damaged or the sensor plug is damaged or loose, it will cause the mixture to be too thin or too thick, which will cause the fault light to turn on.

There is no doubt that most of the lights will be turned on because of engine failure, at this time, if you are driving, you should reduce the speed appropriately, and pull over to check the engine.

The engine fault light suddenly turned on, first check whether the water temperature gauge and oil pressure warning light are on, if there is nothing abnormal in driving, slow down to the nearby repair shop to check the fault.

It is very likely that there is a problem with the wire connecting the lamp, and there is a leakage of electricity, so it suddenly lights up.

This is because of some operating errors, the engine is too hot, so the fault light is on.

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.

A car engine failure light on may be a failure of the vehicle's engine emission system.

This fault is the most important and most common reason for the failure of the vehicle engine light, and most of the reasons for this failure phenomenon, most of them are the cause of carbon deposition in the vehicle engine, or the problem of fuel quality.

The suggestion is to clean the carbon deposits of the throttle and intake tract, and then clean the carbon deposits in the combustion chamber.

Maintenance of car engines:

1. Change the oil and filter element regularly.

The quality of any quality grade of lubricant will change during use. In order to avoid failure, the oil should be changed regularly according to the use case, and the oil amount should be moderate (generally the upper limit of the oil gauge is better).

2. Use lubricating oil of appropriate quality grade.

For gasoline engines, SD-SF gasoline engine oil should be selected according to the additional devices of the intake and exhaust system and the conditions of use; The diesel engine should be selected according to the load of the jujube machine, and the selection standard should not be lower than the requirements specified by the manufacturer.

The reasons for the sudden illumination of the engine fault light are poor gasoline quality, problems with the engine sensor, ignition system failure, exhaust system failure, etc.

First, the quality of gasoline is poor.

If substandard gasoline is added, the gasoline will not burn enough while driving, and the engine fault light will come on.

Second, there is a problem with the engine sensor.

A vehicle's engine will have multiple sensors, and if one of these sensors is damaged, the fault light may come on. For example, there was a problem with the oxygen sensor that affected the combustion efficiency of the engine. Or there is a problem with the intake air temperature sensor, which affects the working condition of the engine, etc.

3. Ignition system failure.

A faulty ignition system can also cause the engine fault light to come on, such as a problem with the spark plug or ignition coil.

Fourth, the discharge system failure.

A failure of the discharge system may also make the engine fault light illuminate. For example, the three-way catalytic converter malfunctioned, and the exhaust emissions exceeded the standard.

Location of the engine fault light:

The engine fault light is an important indicator on the dashboard of a vehicle, usually showing a small icon or the word check engine. In different makes and models of cars, the location of the engine fault light may be different. However, in general, the engine fault light is located in the center of the instrument panel in front of the driver or in the instrument cluster on the driver's side.

In some vehicles, the location of the engine fault light may also share a display screen with other indicators, such as a multifunction steering wheel or center console. But no matter where you are, the driver needs to keep an eye on the light. If the engine fault light is found to be on, it is necessary to check it as soon as possible to determine the specific cause of the fault and deal with it accordingly.

The fault light of the car is on, which corresponds to the failure of a certain function of the car, so what happens when the owner uses the car, the engine failure and so on suddenly turn on?

1. The sudden onion of the engine fault light may be caused by the fact that the spark plug has not been replaced for a long time, so that the gap between the spark plug and the engine is too large, or there is carbon deposition in the engine, or it may be caused by damage to the internal parts of the engine.

2. The oxygen sensor circuit of the car is detached, and the oxygen sensor burns out, which will cause the oxygen sensor to be unable to correctly determine whether the oxygen content in the engine exhaust is up to standard, so that the engine fault light will be lit.

3. If the owner finds that the vehicle cannot be started when starting the car, and the fault light of the engine is lit at the same time, it may be that the fuel pump of the vehicle is faulty or the ignition system of the vehicle is faulty.

When the owner is using the car, if the above phenomenon occurs, it is necessary to contact the rescue personnel immediately, or go to the car 4S shop by professionals to repair the vehicle to prevent other faults in the vehicle and affect the normal use of the engine.