What happens when the car engine fault light is on, there is no fire, and it can t start

Hello car owners! It is necessary to use a computer to detect any faults in the engine computer board and repair it according to the fault.

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.

Common faults and troubleshooting methods of automobile engines.

When the automobile engine is not working properly, and the self-diagnosis system does not have a fault code output, it is especially necessary to rely on the operator's inspection and judgment to determine the nature of the fault and the location of the fault. The author now summarizes the common faults of automobile engines as follows:

The engine does not start.

1) Fault phenomenon: turn on the ignition switch, turn the ignition switch to the starting position, and the engine cannot start.

2) Possible causes of failure:

a.The engine cannot rotate or rotates too slowly due to the failure of the starting system: the battery is not stored enough, the electrode pile clamp is loose or the electrode pile is seriously oxidized; The main fuse of the circuit is broken; Ignition switch failure; starter failure; The starting line is broken or the line connector is in poor contact.

b.Ignition system failure: The ignition coil works poorly, resulting in weak or no high-voltage sparks; ignition failure; The ignition time is incorrect.

c.Fuel injection system failure: There is no fuel in the tank; The fuel pump is not working or the pump oil pressure is too low; Fuel line leakage and deformation; The disconnect relay is disconnected; The fuel pressure regulator is not working well; The fuel filter is too dirty.

d.Air intake system failure: Failure of the idle control valve or its control line; Idle control valve air pipe rupture or joint leakage; The air flow meter is faulty. Fault.

If the general engine fault light is on, it is possible that the state of combustion is not particularly good, and the state of the general engine is not good, which is the main reason for the amount of engine failure light. There is also an engine guarantee that will also cause the fault light to be on, such as the car is weak, and the engine noise is too loud, or there is a significant knocking sound. So it's still necessary to do some regular maintenance and repairs.

1. Too much carbon deposits inside the throttle or engine.

2. After the failure of the oxygen sensor, the mixture is out of balance. This phenomenon is easy to occur if you drive at low speeds in urban areas for a long time.

3. The phenomenon of leakage of the fuel injector leads to the fact that the fuel injector is still in the state of oil supply after the throttle is collected, resulting in the mixture being too thick when driving at low speed, resulting in unstable idle speed after the fuel injector. If it is severe, it will be turned off directly.

In this case, you need to use a computer to enter the system to read the fault.

Spark plug carbon deposition on the market The uneven quality of fuel and congested urban traffic make it easy for automobile spark plugs to produce carbon deposition, which will lead to poor engine work, difficult starting, unstable idling, poor acceleration, urgent refueling and tempering, exhaust gas exceedance, increased fuel consumption and other abnormal phenomena.

Engine failure light flashes and flashes and does not catch fire Reason:

1. Soon after refueling, the engine fault light was lit on the car dashboard; This is generally due to the addition of poor quality gasoline at non-standard gas stations, resulting in insufficient combustion of the oil-gas mixture and the engine fault light when the engine is working. This will not affect driving safety, but it will cause more or less harm to the engine;

2. Oxygen sensor failure: Now there are two oxygen sensors installed on the car, one before and one before and after the three-way catalytic converter. The function of the front oxygen sensor is to detect the air-fuel ratio of the engine under different working conditions, while the ECU computer adjusts the fuel injection amount and calculates the ignition time according to this signal. The rear is mainly to detect the working of the three-way catalytic converter!

Therefore, 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 be on;

3. Air flow sensor failureThe air flow sensor is also known as the air flow meter, which detects the amount of air inhaled and converts it into an electrical signal to the ECU of the electronic control unit, and indirectly lets the ECU decide how much fuel to spray according to the optimal air-fuel ratio. If the air flow sensor or wiring fails, the ECU will not get the correct intake volume signal and will not be able to control the normal fuel volume, resulting in the mixture being too thin or too thick and the engine will not work properly.

In this case, it is often caused by the failure of the ignition system, so it is recommended that it is best to test the fault code first, and analyze and judge the cause in combination with the fault code.

Hello, I am helping you sort out the answers to your questions, please wait a while The engine fault light is on, and it does not ignite, generally it may be that there is a problem with a certain sensor of the engine, or there is a problem with the crankshaft position sensor. At this time, you need to use the car's computer to read the fault and ask questions.

The fault light is fully lit for questioning.

The answer is that the fault light is all on, that is, it means that it is not started, and it is not the fault light at all. In this case, you have to see if the motor is not working. You have to see if the motor responds when you start, and if you don't, it may be a problem with the motor.

There are at least a dozen reasons why the engine failure light will come on and it won't catch fire. If you can't ask here, hurry up and find a trailer to go to the repair shop.

The vehicle safety system will have this logic: ABS failure affects driving safety, so the ignition system is locked, so that it cannot ignite. The specific ABS fault may be the sensor, line, control computer, etc., but the probability is not high, generally caused by the battery power loss, because ABS has high requirements for power supply.

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1. Sensor problems. For example, water temperature sensors, air flow sensors, inlet air temperature sensors, oxygen sensors, etc., damage or poor contact will cause the engine failure light to turn on.

2. The inside of the engine cylinder is not clean, and there is carbon deposit. The reason for this is generally because the fuel used is not of good quality and there are too many impurities.

3. The air filter element of the car is seriously blocked, which affects the air intake of the car, and if it is serious, it will cause the engine fault light to turn on.

4. Almost all electronic components on the car will turn on the engine fault light if they fail.

Hope it helps.

There are several reasons why the engine fault light is on and cannot ignite, one is that there is a problem with the engine's starter, the second is that the battery is insufficient, and the third is that the ignition coil is faulty, or there are other problems.

There are several reasons why the engine does not ignite:

1. The battery is insufficient, or there is no power, for the diagnosis of such faults that the engine cannot start, the battery should be tested first. It is necessary to find out whether the engine does not start because the battery is insufficient, and the battery needs to be charged if it is insufficient.

2. Engine starting system failure. 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.

In addition to this, of course, ignition switches, starter relays or solenoid coils.

There is also an on-board anti-theft system, which is also an important part of the starting system. Boot system damage needs to go to the 4s shop.

Repair. 3. Engine ignition system failure. In early ignition systems, the ignition coil could be easily removed.

An electrical spark detector is then used to detect whether the electrical spark is normal. Ignition system failures can be used to clean up deposits or replace spark plugs.

The above are the reasons why the engine does not catch fire, you can check them one by one.

After the vehicle is powered on, the built-in driving computer of the car will self-check the vehicle, if the vehicle is faulty, the corresponding fault light will be lit at the same time, so what is the reason why the engine fault light is not on fire?

1. The engine fault light of the vehicle is on, accompanied by the phenomenon that the vehicle cannot ignite, it may be that the ignition system of the car is faulty, such as the ignition coil of the vehicle falling off and breaking, which may cause the vehicle to fail to ignite, and it is necessary to go to the 4S shop in time to check the ignition system of the car.

2. If the age of the vehicle is too long, the gap of the spark plug is too large or the carbon deposit is too much, and the fault light of the engine will also be lit, and the spark plug of the car needs to be replaced if the vehicle cannot be started and cannot be ignited.

3. If the air flow meter of the car fails, the ECU will not be able to judge the correct air intake, and the normal fuel volume will not be controlled, which will lead to the abnormal concentration of the mixture, the vehicle will not catch fire, and the fault light of the engine will also be on, so the air flow meter of the car needs to be repaired in time.

Normal, no ignition, all lights will be on, no ignition state after power-on, the driving computer has started the detection, at this time the engine is detected that there is no action, so the engine light will be on, after ignition, the test again, the engine is running normally, the engine light is off;

After powering on, the ignition state is not ignited, the driving computer has started to detect, at this time it is detected that the engine has no action, so the engine light will be on, and the engine light will be detected again after the point, the engine is running normally, and the engine light is off.

I'm also this problem, after powering on, the driving computer is detected before starting, all the lights are turned on and turned off, only the engine light is not off, and the engine light goes out after starting the engine, does anyone know?

Of course it is normal, no ignition, all the lights will be on.

Of course it's not normal, check it well.

Normally, all cars are like that.

There are many cases where the engine oxygen sensor is abnormal and causes the engine fault light to alarm. The engine oxygen sensor is generally placed near the intake manifold, due to intense driving or some collisions, the oxygen sensor will be displaced or damaged, which will cause the sensor to be abnormal and cause a fault light alarm.

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 impurities will produce carbon deposits after combustion, and the accumulation of carbon on the throttle to a certain extent will affect the normal opening and closing of the throttle, affect the normal work of the engine, and cause the alarm light to light up.

Another common scenario is sensor failure. After walking on a muddy road, the engine fault light suddenly turned on, but there was nothing unusual about the car itself. When I drove the car to the 4S shop for inspection, it was found that the left front wheel sensor was faulty.

As a result, the problem was solved by slightly cleaning it with water and then installing it. An abnormal sensor does not necessarily mean that the vehicle is faulty, but there will certainly be an anomaly that needs attention.