What is the reason for the car engine failure light to stay on?

There are too many possible reasons for the engine failure light, which can be roughly divided into the following three categories: 1. False failure. Report the fault**, but the work is normal, it may be that a certain operation is beyond the control of the computer, and the fault of the computer feedback can be eliminated first, and then see if the fault code is still jumped.

2. Minor faults. There is no particularly obvious fault in the engine, according to the computer detection information and further inspection, it is found that there is really some kind of fault, which does not affect normal driving or has little impact, and needs to be found and solved in time. For example, the inlet pressure sensor is faulty, etc.

3. Major failures. Such faults are noticeable to the naked eye and driving sensations, and seriously affect the normal operation of the engine, requiring immediate repair. For example, the engine is obviously underpowered, and it is likely that the oxygen sensor is a problem.

Just because the engine fault light is on doesn't mean the engine won't work. First of all, the fault light is on, it is necessary to detect and repair, if you happen to be near the repair station, you can go to check at any time It is best to check it immediately, if you are far away from the maintenance station, and there is no time to go to the maintenance station to check, as long as you feel that there is no obvious fault in the engine, you can do your thing first. There are just a few things to note.

1. Don't drive as usual during driving, and it's 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.

Hello, there are usually the following reasons for the engine failure light: 1. The combustion state is not goodThe engine combustion state is not good 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 a launch.

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. In the case of faults such as engine failure to start, the first thing to do is to check the circuitry in the engine starting system. From the perspective of the most basic composition, the circuit of the starting system generally includes the following basic parts, that is, the battery, the starting motor and the cable connecting these parts.

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 a spark detector, an adjustable detector is preferable to a fixed design because it allows you to adjust the detector to a smaller gap so you can tell if there is no spark at all, or if there is an electric 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 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 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.

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.

There are many reasons why the fault light of the car engine is always on, as follows.

When the engine fault light is on, we can restart the vehicle or test the connector of each wiring harness to check whether the fault light will turn off, and in some cases the engine fault light is caused by a loose plug in the wiring harness.

2. The car is not maintained regularly and on time.

3. Oil problems.

When most people use engine oil, they will care about whether they are using fully synthetic oil or semi-synthetic oil, but no one will care whether they should change the oil, which will cause engine failure, and in serious cases, it will lose lubrication and cause wear and tear of the engine, so it should be replaced in time.

4. Spark plug problem.

This kind of problem usually appears in vehicles that are not maintained on time, in the case of a spark plug completely failure, it will cause one cylinder of the engine to not work, so that the engine fault light will be on, in fact, this problem can be solved by replacing the new spark plug.

5. Carbon deposition.

If the engine travels too many kilometers and a large amount of carbon deposits are not treated, then it is also possible that the carbon deposits have damaged the cylinder walls of the engine cylinders, causing the engine fault light to alarm.

In this case, the sensor may be damaged, and the trip computer cannot receive the correct signal, so the fault light will always be on.

This can be caused by a problem with one of the engine's sensors, such as the crankshaft sensor or the oil pressure sensor.

The fault light of the car engine is to indicate the status of the car engine, it may be that the engine of the car is faulty and should be overhauled in time.

The reasons for the failure light of the automobile engine are as follows: The poor quality of gasoline will lead to insufficient combustion of the mixture in the cylinder, resulting in the pollution light on, and it is also easy to produce carbon deposits. The presence of carbon deposits in the intake tract and piston tips can lead to poor atomization, which can lead to insufficient combustion and engine failure lights to stay on.

When starting a cold car, especially when the weather temperature drops sharply.

Hello, the vehicle is faulty, go to the 4S shop to adjust the fault code to see.

Hello, it means that the engine is faulty.

The function of the fuel system is to supply a certain amount of clean and well-atomized gasoline to the engine according to the needs of the engine's operating conditions, so as to mix with a certain amount of air to form a combustible mixture. At the same time, the fuel system also needs to store a considerable amount of gasoline to ensure that the car has a considerable driving range.

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.

The engine fault light is on, which is generally a fault of the emission system.

It is recommended to go to a 4S store or a professional store for computer testing, and most of the faults are sensors and execution components.

Engine failure lights? As far as I know, there's no light on the meter.

It is recommended that the computer perform the test, and the results will generally be available.

It means that if the electronic control system finds that the sensor or actuator is faulty and cannot be restored to normal, it will light up the fault indicator to warn it, and it needs to be checked with a detection instrument.

There are many reasons that affect the engine failure light to stay on, such as damage to the oxygen sensor, engine knocking, damage to the water temperature transmission nuclear inductor, poor gasoline quality, etc.

The oxygen sensor checks the oxygen content in the exhaust gas. There are two oxygen sensors, one behind the exhaust manifold and the other behind the three-way catalytic converter. The oxygen sensor detects the oxygen content in the exhaust gas and feeds a signal back to the ECU, which then adjusts the air-fuel ratio based on this signal.

If the oxygen sensor is damaged, it cannot feedback a signal to the ECU and may also feed an incorrect signal to the ECU. Then the ECU is unable to accurately adjust the air/fuel ratio, which may affect the engine failure light.

When the engine produces a violent knock, the engine fault light also illuminates. The engine cylinders are basically equipped with knock sensors, which can dig the source to check for knocking, and feed back the signal to make some adjustments to prevent knocking after knowing that the engine is causing knocking.

If your car is going to add 95 gasoline, then you must not add 92 gasoline, which will affect the engine and cause detonation.

If the engine fault light is on, it is best to go to the repair shop to check the cause. You can use a diagnostic computer to read the fault** to see which part is faulty. When you usually use the car, you must not add some gasoline of poor quality, which will affect the increase of carbon deposits in the engine.

Finally, () Bian Xiao is honored to answer for you. What causes a car engine failure long light? I have some opinions on this issue, and I hope you can find it helpful after reading it! If necessary, Bian Xiao is here waiting for your visit.

Generally, the car turns on the car key for 10 seconds and the lights are turned off by itself if the whole car is not faulty, and it doesn't matter under normal circumstances.

Reasons for reference only: 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 data of the hail machine, and the engine failure light will be on at this time. 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 that you should take care of 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; The air intake can also cause the engine failure light to illuminate.

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