The car fault light is on, but it doesn t light up as soon as it catches fire, what s going on?

Hello, the engine fault indicator light is lit before the car is not started, which is normal, indicating that the engine computer is in working state, and secondly, the engine computer needs to self-test the system before it is started.

1. It is normal for the oil warning light and power generation indicator to be lit after the engine is not started when the engine is not started (on the contrary, it is not normal if it is not lit), this is because the engine is not started, so the oil pump and generator are not working, at this time, the generator does not generate electricity, and the oil is not pressed, so these two indicators are used to remind the driver of the working state of the car.

2. After the engine starts, the generator and the oil pump start to work, at this time the generator has begun to generate electricity, and the oil pump works to make the oil reach a certain pressure to meet the needs of the engine, so the two alarm lights will go out, which means that the system is running normally.

If the engine has been started and the alarm light is still on, it means that the power generation part of the car is faulty or there is a problem with the oil pressure, and the engine needs to be turned off and then the car is tested (mainly the oil part, if the engine continues to work in the oil pressure alarm state, it may cause serious damage to the engine).

The engine indicator light of the car dashboard flashes and does not ignite is the engine alarm car engine that causes the fault light to light up the factor: there are many factors that cause the fault light to be on, it is recommended that you check it with the maintenance decoding equipment (maintenance computer), and the maintenance computer can read the data stream, so as to find the cause of the failure.

No matter which car it is, when the engine is turned off, the fault light is on, and it will not light up after it is turned on, which is normal (please see the picture below).

If the engine fault light is on while the engine is running, there is a problem.

This is when the engine is stationary.

Many fault indicators of the vehicle are in a self-test state when they have not entered the working state, and they are always on (like the engine fault light, the ignition switch is always on, and it will be extinguished under normal circumstances after starting; However, systems such as airbags and anti-lock brakes are in working condition when the ignition switch is turned on, and under normal circumstances, it will be extinguished after five seconds of opening, otherwise there will be a failure. ）；If it is in the solid state under normal working conditions, there is a fault, and you need to use a decoder to enter the system to read the fault code, and then repair it.

This is a self-test procedure for the engine, which will stay on if there is a problem with the engine, and will not light up if there is no problem with the engine.

If this happens, most of it is caused by the battery, at this time you can remove the negative pole of the battery for him, wait for a minute or two and then install it for him, then the fault will not appear.

Before the vehicle starts, the driving computer will perform a self-test, so all the fault lights will be lit, which is very normal, and it will disappear after the vehicle starts, so you don't have to worry.

Normal. 1. It is normal for the oil warning light and power generation indicator to be lit after the engine is not started when the engine is not started (on the contrary, it is not normal if it is not lit), this is because the engine is not started, so the oil pump and generator are not working, at this time, the generator does not generate electricity, and the oil is not pressed, so these two indicators are used to remind the driver of the working state of the car.

The car fault light is on, but it doesn't light up as soon as it hits the fire, what's going on? Generally, the car fault light will not light up when it is on fire, which means that there is no fault in the car, if there is a faulty goods, the car will be lit when it is ignited, in this case, you should not drive this car, so as not to have an accident.

The fault light is on, you look at where the car fault light is on, you just check it**? Generally, usually. It's a short circuit, and your engine will stop after the fire is ignited.

You said that the fault light is on, but it doesn't light up as soon as it catches fire, which may be because of some problems with the engine, so it may be that it doesn't light up, and it should not light up when it starts.

The engine fault light is on when the car is turned off, it is normal for the fault light to be off when the car is turned off, and if it is still on fire, it means that there is a fault.

Sometimes the car breaks down, and the light is on because the car bursts out of the false fault, so when the fire is on, the car will automatically turn off when the car fails.

First of all, your car is normal. No problem. The reason why it lights up before starting is because of the meter self-test. When the car starts, the engine will automatically turn off when there is no problem.

The eldest sister covered her mouth and smiled, and what she said was more correct.

Not only the fault light, but also some other detection lights will be on. Powering on means that these lights are working.

If the bulb is broken, it won't show up even if there is a problem at that time.

So these are the reminders that these lights are working and will not light up if the ignition is normal. It means it's okay.

There are many kinds of car fault lights, and the color of the fault lights is also different, and the meaning of the representative is also different, and the yellow fault lights are just a warning effect, not necessarily a fault.

The yellow fault light of the engine is lit up during the self-test of the car, and the yellow fault light is extinguished after the ignition is successful, indicating that the engine is normal.

If the fault light on the screen will automatically turn off after ignition, it means that the engine is fine.

Engine Failure Causes:

1. Oxygen sensor failure. 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.

2. The quality of gasoline is poor and not up to standard. Generally, it is because of the addition of poor quality gasoline at non-standard gas stations, resulting in insufficient combustion of oil-gas mixture when the engine is working. At this point, the dashboard of the car will light up yellow.

3. Spark plug carbon deposit. Excessive carbon deposition will cause the ignition coil to reverse breakdown, which in turn will lead to the failure of the ignition coil, causing poor ignition and incomplete combustion. At this point, the fault light will also turn on.

4. The engine lacks cylinders. The lack of cylinders in the engine will also be accompanied by the following phenomena: high fuel consumption, black smoke, weak acceleration of the car, serious shaking, and increased noise. At this time, the fault light will also turn on.

This is usually accompanied by the following problems:

1. The quality of automobile exhaust gas deteriorates and pollutes the environment;

2. Increased fuel consumption of automobiles, waste of petroleum resources and RMB resources;

3. The temperature of the combustion chamber increases and the wear intensifies, which may lead to early damage to the engine;

4. The engine burns engine oil;

5. The engine noise increases, affecting the comfort of driving and riding.

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.

When the key is turned on, it is normal for the engine fault light to be on, because the engine computer needs to self-test the engine-related systems to check whether there is a fault phenomenon. If it does not catch fire, first overhaul it from the pressure of the electric oil cylinder. I hope to adopt.

1.Check whether the spark plugs, high-voltage wires, etc. are damp due to the rain of the car, and if so, you can dry the damp parts before starting. Or take a more hassle approach: use the hair dryer you use to blow your hair directly on the damp parts.

2.Check the spark plug for damage, and if it does, just replace it with a new one. However, for many novices now, it is difficult to disassemble the spark plug, generally speaking, the spark plug mileage of the car is 23,000 kilometers.

3.Check if the battery voltage is sufficient. For voltage, many batteries are now very advanced, with an observation hole for detection, when it is green, it can be used normally, black appears, it needs to be supplemented or maintained, and white appears, and the battery should be replaced.

Hello Ignition system faults can be divided into two situations according to their position in the ignition system: low-voltage circuit faults and high-voltage circuit faults.

1) Common faults in low-voltage circuits: insufficient battery storage; Poor or deranged wire connections; Poor battery tie-up; Damage to the distributor or Hall sensor; Damaged ignition switch or poor wiring; The transistor ignition control unit is damaged or poorly wired. Most of the diagnostic methods for low-voltage circuit faults use ammeter or voltmeter to check the fault line by line to eliminate the fault point.

2) Common faults of high-voltage circuits: high-voltage lines fall off or leakage; Breakage and breakdown of distributor cover; Ablation, rupture, breakdown of distributor fire head; The spark plug electrode gap is too large or too small; Excessive carbon deposits in the spark plug; damage to the spark plug insulator; The ignition coil is damaged or the wiring is falling off. Most of the faults of high-voltage circuits adopt the high-voltage fire test method, that is, the high-voltage line in the center of the distributor or the high-voltage line of a cylinder is unplugged, and the wire head is placed at a distance of 3-6mm from the cylinder block, and the engine is started to test the fire.

Hello, I am your exclusive technician Cui Zhiqiang, attentive, careful, dedicated to answering your car questions, for you to find the corresponding problem solutions and solutions! The engine fault light does not light up means that the engine self-test has not passed, if the system is read with a diagnostic instrument, it should not be able to enter, basically there are three reasons, whether the power supply of the engine computer version is normal, whether the communication line is open and short-circuited, and the engine computer version itself is caused by the problem.

Different types of fault lights are on, but the car is not on fire, use the diagnostic instrument to detect, view the specific data and fault code, you can determine the fault point, if the instrument on a number of fault lights are on together, check the voltage of the battery and the generator.

Hello, there are many reasons for this situation, the specific situation requires you to go to the 4S shop for repair or replacement, if it is helpful to you, I hope you will adopt, thank you.

There are many reasons why it cannot ignite, such as spark plugs, high-voltage packs, and voltage, and oil circuits should also be checked.

In the process of driving, in fact, we must pay attention to a series of safety issues, because if you don't pay attention to burning, there may be a series of car accidents, these car accidents will cause some property damage, and may lead to a series of life safety problems, which will have a great impact on people, and even cause panic in society, so we should pay extra attention to a series of problems with the car, some netizens asked on **, if the fault light of the car is not on, but the car does not catch fire, What is generally going on at this time? Let's find out together.

It is believed that if the fault light of the car is not lit, but the car does not catch fire, it may be due to the following reasons. The first reason is that there is a ruler may be because the quality of gasoline is relatively poor, because the gasoline may have some water or a series of other aspects of poor quality, at this time, sometimes some engines will work when there is not enough gas combustion, so there is no way to turn off the engine normally at this time. The second reason may be due to the series of oxygen sensors installed in the car.

And these oxygen sensors have a series of failures, so if the sensor is damaged or a series of failures occur, the car may not catch fire at this time.

In addition to the poor quality of gasoline, substandard and a series of failures in the oxygen sensor, it is also possible that the air sensor on the car has some failures, because if the air sensor fails, the fuel control will not be able to be carried out normally at this time, which may lead to some gases that are not fully mixed in place and cannot work. There are also some reasons that may be due to spark plugs.

Carbon deposition, because the spark plug carbon deposition will cause less poor engine work, and there is a series of abnormal phenomena such as increased fuel consumption or high spring sales difficulties in starting, which may lead to the ** of the car.

In general, there are many reasons why the car stalls but the fault light does not light up, such as the quality of gasoline or the failure of the oxygen sensor and air sensor, or even a series of problems such as carbon deposition in the spark plug.

It may be that the battery is dead. At this time, it is necessary to check whether the battery is out of power, and if so, replace the battery immediately.