What should I do if the engine fault light stays on and occasionally goes off on its own?

Sensor damage, poor contact or signal interruption, engine maintenance, poor fuel and oil quality. The gas mixture does not burn enough. spark plug failure and ignition coil failure; Sensor Problem: The sensors mentioned here are water temperature, crankshaft position, airflow, intake air temperature, oxygen sensor, etc.

If these sensors are damaged, have poor contact, or the signal is interrupted, the engine fault light will illuminate. Poor engine maintenance is the most common cause of engine failure. We know that vehicles have a certain maintenance interval.

If the owner does not maintain the driving habits on time, the burden of engine operation may increase.

This is a self-test link when starting the vehicle, and the engine fault light detects whether the exhaust emissions are normal through the sensor. When the exhaust gas exceeds the standard, the engine warning light will sound an alarm. Most of the time, if the lights are on, it means that he is fine.

Perhaps some problems caused by poor fogging in the cylinder of a fuel engine can cause the alarm to sound as soon as the engine starts. When the temperature rises, the warning light will naturally go out. The engine failure light is the faucet of the instrument and the mark of the submarine.

Its full name is Engine Exhaust Emission Detection Light.

Low air temperature at start-up can turn the engine on and off, and when cold starting, the cylinder walls and other parts of the engine are cold metal parts. When the engine is working, the fuel injected from the injector to the cylinder is atomized. When the mixture hits the cold cylinder wall after fogging, it condenses on the cylinder wall, and the gasoline concentration is low when the cylinder is ignited, and the combustion effect decreases.

The lights are on for a long time after starting, probably because of the accumulation of carbon in the cylinder. If the engine fault light is on for tens of seconds, it may be because the cylinder has accumulated carbon. Uncured hydrocarbons have oil-absorbing properties.

Engine** means it can cause serious engine damage or loss of power. **Divided into perceptual and non-perceptual. In the case of non-flow detonation, the engine computer adjusts the engine control parameters based on the detected situation to prevent further adverse effects.

If the non-perceptible knocking is beyond the control of the engine computer, the engine fault light will illuminate and the alarm will sound. It is recommended that you check for errors**. There may be hidden danger when the engine fault light is on.

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 immobilizers, 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 earlier ignition systems, you could easily remove the ignition coil and use a spark detector to detect if the spark was normal. When choosing an electrical spark detector, an adjustable detector is preferable to a fixed design, as it allows you to adjust the detector to a smaller gap so that you can tell if there is no electrical spark at all, or if there is an electrical 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.

In this case, there is a problem with the machine, generally speaking, it needs to be sent to the repair shop for repair, and it is good to see if there is any problem and deal with it in time.

It will not take you too long to drive the car to the repair shop in time and let a professional maintenance master help you deal with it.

There are many reasons why the engine fault light will turn off for a while, it may be due to poor fuel quality, clogged air filter, or low temperature and battery loss.

When we start the car when we drive the vehicle, the fault light is likely to turn on and off, sometimes it is some temporary failure, and you don't need to take care of yourself, but you still need to check it, so as not to cause accidents because of some small problems that are not checked.

1. The temperature is too low at the start.

This usually happens in the winter, mainly because the temperature is too low in the winter and the temperature inside the engine is too low. When the car starts, the degree of atomization in the engine injection cylinder is far from enough, so the engine fault light will be on, and the temperature of the engine will rise after driving a certain distance, this fault will not exist, so the light will go out, and there is no need to repair this situation, as long as the temperature rises, the engine failure will disappear naturally.

2. The fuel quality is not good.

When driving a vehicle, if the engine fails, the light suddenly turns on when it is on, and everything is normal when you get up and continue to drive, and you do not have any problems in operation, it may be because your fuel quality is not good enough, resulting in insufficient combustion, so the engine failure occurs. Therefore, remind everyone to go to a regular gas station for refueling when refueling, do not go to some small gas stations, and the use of poor quality oil for a long time will aggravate the engine failure.

3. The air filter is blocked.

If the fault light will flash suddenly when we press the accelerator to accelerate, it may be that the air filter in our car is blocked. Once the air filter is clogged, it can't filter dust, so it can cause the engine failure light to flicker on and off. If this happens, you can go to the car repair shop to replace a new air filter, ** is about a few tens of yuan is not very expensive, but if it is not replaced for a long time, it may lead to aggravated engine failure.

The fault light turns on and off, usually more often in the winter when it starts. The reason for this is that the temperature inside the engine is too low. Because in winter, the temperature is generally low, and the internal temperature of the engine is also very low.

It may be that the exhaust emissions are not up to standard, it may be that the throttle valve is stained, it may be that it is not cleaned up in time, it may be that the line is short-circuited, and it may be that the air conditioning filter is broken.

It may be because there is a problem with the quality of the gasoline in the tank, and the quality is not very good, so the engine fault light will be on for a while and then go out.

This is normal, after the engine is started, the driving computer will automatically detect whether the vehicle is faulty, if there is no problem, all the fault lights will go off after the self-test.

If the various fault lights do not go out after starting, it means that there is a fault.

Hello. After the vehicle has the keys opened. Appearance. All fault lights are lit to detect the vehicle's relevant systems. It is normal for all faulty lights to go out after three seconds after starting the car. If there is still a fault light lit, it proves that the system in question is faulty.

Hello, it is normal to turn off after starting.

This phenomenon is normal.

Under normal circumstances, the car starts in two steps, first power-on self-test, and then start the car after the end, the car is in the power-on state, the relevant self-test operation is carried out, then the relevant fault light on the dashboard will be on, after the car starts, the relevant fault light is off on normal, many people are directly started, without self-inspection, so when it is just started, there will be related faults on the dashboard.

"The engine failure light is on and goes off after starting, which is normal. When the key is opened normally, the engine fault lamp, oil lamp, and battery lamp are all on, and they are all turned off after starting the car, and the instrument is not lit when the car is moving. There are too many possible reasons for the engine failure light to turn on, and they can be roughly divided into the following three categories:

1. False failure. Reported fault**, but working normally, it may be that a certain operation is beyond the control of the computer, the computer.

Engine failure light turns on and off Reason:

1. The instrument prompts that the gearbox is abnormal or the fault light is on, which is generally the alarm when the gearbox fails, and the fault can be determined by computer detection;

2. It may be that the gearbox and the electronic components of filial piety are faulty, and the solution is: use a computer to detect and replace the damaged electronic components;

3. If the mechanical components of the gearbox are seriously worn, the solution: repair the damaged mechanical components;

4. There is an engine or ABS failure that sends an wrong signal and interferes with the gearbox, solution: detect the engine and ABS, and repair the damaged electrical components.

If the fuel quality is not good, it may also lead to insufficient combustion during driving, and the engine fault light will jump out, but it will not last too long, and if you turn it on again, it will naturally go out. In this case, we don't have to worry, it is very likely that low-quality gasoline has been added. However, the gasoline is filtered by a gasoline filter before entering the combustion chamber, and it will not cause any damage to the engine, so there is no need to pump out the inferior gasoline.

In addition, some old cars have more carbon deposits, which is also easy to cause engine failure lights to turn on, because the carbon deposits last for tens of seconds, and then extinguish is caused by carbon deposits. Because when the car is just started, a part of the fuel sprayed will be adsorbed by carbon deposits, and the concentration of fuel entering the cylinder is low, which leads to the light of the land lamp.

Finally, after slamming on the accelerator, the engine fault light came on, but after a while, it went off. This situation is because the air intake is not smooth, it may be that the air filter is too dirty and the air filter needs to be replaced.

It is normal for the engine fault light to turn on and off. When the power supply on the car is turned on but has not been officially started, various fault indicators on the car, including the engine, water temperature, battery, airbags, etc., will be lit at the same time, and when the vehicle starts, these lights will automatically go out, and this is the vehicle's self-detection function in operation, which is a normal phenomenon. The following is an extension of the material:

1. Automatic vehicle detection: This is because the vehicle is equipped with a set of self-protection system. The purpose is to let the driver know that the information inside the vehicle has changed, and call for preparation.

In this way, it will be possible to avoid some accidents caused by vehicle problems. Therefore, it is normal for the engine light to turn on and off, so you don't have to worry too much. 2. How to deal with the flashing engine fault light:

1) The car can't start, this may be a failure of the fuel pump or ignition parts, and you can directly ask for help. (2) The fault light is on, but there is no abnormality in driving, this may just be a sensor failure, you can continue to drive temporarily, but it is best to go to the repair shop at low speed and slowly. (3) When the engine failure light is on, the vehicle can be driven, but there are symptoms such as severe shaking and acceleration weakness, and in the face of this situation, it is necessary to stop in time and call for rescue.

Hello, I am helping you sort out the answers to your questions, please wait a while This is normal, the engine fault light will be lit when the key of any car is not turned on (everyone calls it self-test), and it will be extinguished about 1 second after landing, which basically means that the engine is working normally. If the car doesn't turn off, there must be a problem.

But when the other lights went out, the engine failure lights came on.

That's right, the engine must be on when the car is not on.

So why don't those new cars light up?

Without what you said, you probably didn't pay attention.

Summary. The fault light is on before the engine is not started, this is a normal phenomenon, it is a self-test process of the vehicle, if the fault light will automatically go out after the engine starts, it is a normal phenomenon that the fault light will be self-tested after he starts, so it will be automatically extinguished. There is nothing wrong with this, it works fine with normal use, every engine is like this.

Hello, I'm helping you sort out the answer to the question, please wait a while Hello, I'm helping you sort out the answer to the question, please wait a while The fault light is bright before the engine is not started, this is a normal phenomenon, it is a self-inspection process of the vehicle, if the fault light will automatically go out after starting the mountain fiber machine, that is a normal phenomenon, he will start after the fault light will be self-checked, so it will be automatically extinguished. There is no problem with this, it can be used normally, and every engine is like this.

What should I do if the engine is turned off and the fault light is onWhat should I do if the engine is turned off and the fault light is on The causes of the infiltration fault when the engine is turned off and the fault light is always on: 1. The fault light is on, the high-speed driver, the engine system is in a faulty working state, and it is checked and repaired in time; 2. The computer will save the fault information, which can quietly provide reference for the maintenance personnel during maintenance, so that they can solve the fault faster; 3. In order to ensure that the engine can continue to drive after failure, the computer will automatically ignore it if it detects that the engine is safe under normal operation. so that you can continue to drive normally to the repair point.