The engine fault light is on, but it can drive normally

The reasons why the engine fault light is yellow but can drive normally are as follows:

1. The fuel quality of the car is not up to standard: gasoline is particularly important for the car, because without gasoline, the car cannot be started. The quality of this gasoline is equally important for the car.

When the oil quality is not good, it will cause the engine to burn poorly, which will cause the engine to light up yellow.

2. The combustion state of the engine is not good: when the car is designed, in order to ensure that the engine is in good working condition, and also to ensure the normal working life of the engine, the oxygen sensor is specially installed for the engine, which is mainly used to monitor the combustion state of the engine.

3. There is a problem with the fuel supply system: the fuel supply system includes many important small configurations, such as fuel tanks, oil pumps, fuel pressure regulators, etc., when there is a problem with these configurations, it will lead to problems in the fuel supply system. Although it can be driven, the engine will also turn on the yellow light.

If this situation occurs, you need to go to a professional repair shop or 4S shop to use a diagnostic computer to read the fault code, and the fault code can help the technician quickly find the cause of the fault and the fault location. If the engine fault light is on, it is most likely due to a malfunction in the electronic systems around the engine.

The car is not a simple machine, there are many electronic systems on the car, and if there is no electronic system, the car cannot operate normally.

There is an ECU on the engine of the car, the ECU is the control unit of the engine, the ECU is equivalent to the brain of the engine, and if there is no ECU, the engine cannot operate normally.

There are a lot of electronic sensors and actuators around the engine.

When the engine is running, the ECU can collect various information through sensors, and after processing, the ECU can control the engine operation through the actuator.

If the sensor is damaged, it will affect the normal operation of the engine, at this time the fault light on the dashboard will be on, it is normal for the sensors around the engine to be damaged for a long time, and the reliability and durability of the electronic system itself is not as good as the mechanical system.

And the electronic system around the engine runs in a high-temperature environment for a long time, and the probability of failure is still relatively large, for the electronic system, the high temperature is fatal, if the electronic system is damaged, it only needs to be replaced.

FYI: 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 engine data, at this time it will cause the engine fault light to turn on. 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 to care about 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; Intake booster lines and turbochargers can also cause engine failure lights 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.

The yellow light of the engine indicates that the engine is faulty, and the driving is normal means that it is not a particularly big problem, it may just be a sensor failure, or a false fault, in this case, you can continue to drive temporarily, but for the sake of safety, it is best to drive slowly at low to medium speed, and then immediately drive to a nearby repair shop for maintenance.

There are many reasons for the engine failure light to turn on the yellow light, generally there are the following reasons, if you encounter the engine light on the yellow light while driving, it is best to go to the maintenance shop to check the fault code, and confirm the specific reason for the engine to turn on the yellow light.

1. Fuel supply system problems: The fuel supply system mainly includes fuel tanks, oil pumps, pipelines, gasoline filters, carbon canisters, carbon canister solenoid valves, fuel pressure regulators, fuel nozzles, etc.

2. The fuel quality is not good. Oil quality is the primary factor that causes the engine failure light to be on, the anti-knock of gasoline is expressed by the octane number, the higher the octane number, the better the anti-knock performance, such as No. 97 car gasoline, its octane number is not less than 97, leaded gasoline will lead to lead poisoning of the oxygen sensor, so the oil quality is the main reason for insufficient engine combustion, resulting in the engine fault light on.

3. The fuel pressure is abnormal. If the oil supply pressure of the oil pump does not reach a certain pressure, it will lead to poor atomization of the fuel injector, which will affect the normal operation of the engine.

4. The combustion state is not good. Poor engine combustion condition is the main reason why the engine failure light is on. In the design of the car, in order to ensure that the engine is in good working condition and ensure the normal working life of the engine, an oxygen sensor is designed and installed on the engine to monitor the combustion state of the engine.

Not all engine failures make the car no longer available.

There are many reasons why the engine fault light is on, such as the failure of the three-way catalytic converter, the failure of the oxygen sensor, etc., which will make the engine fault light on, which may lead to the reduction of the power output of the engine, engine shake and other problems, but these will not affect the normal driving.

If you don't know about the car, when the engine fault light is on, it is best to consult the repair shop before driving.

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.

If the engine fault light is on, there is a problem with the engine system, including lubricating oil, although the vehicle can still drive, but it must be dealt with in time.

It's okay, it's okay.

It is now open normally. Sometimes it's a little bit of a problem.

You can go to the repair shop and have a look.

A yellow engine light indicates that the engine is faulty, but it is not a particularly serious fault. It can be driven normally in a short period of time, and even if it disappears on its own, it can be repaired. But if it stays on, you need to read out the fault code through the decoder and repair it according to the fault code.

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.

If the engine fault light turns on and off, it is due to insufficient combustion of the engine mixture due to substandard fuel quality.

In this case, after refueling, add some better quality fuel additives or choose the best fuel station to achieve the purpose of improving the quality of fuel. If the exhaust emission lamp is always on, it is necessary to use a detection instrument to determine the fault storage in the engine, and conduct further investigation according to the content of the fault storage and the system data status of the engine's oxygen sensor. This is because a problem with all the components on the engine that are related to the combustion of the gas mixture will cause the engine exhaust emission failure light to be lit.

The most common causes are: dirty throttle valves, it is recommended to clean them every 2 to 30,000 km; Carbon deposition on valves and fuel injectors, it is recommended to clean the air intake and fuel system every 3 to 40,000 km; In addition, the engine must be maintained on time in strict accordance with the requirements of the manufacturer, and the oil filter, air filter, fuel filter, etc. must be replaced regularly.

Spastic torticollis can generally be cured, and it can meet the clinical or ** criteria. Because spastic torticollis is only a single contracture of the muscle, the muscle tone is high, so the high muscle tone is lowered, and the symptoms are improved to varying degrees. There are several methods of spasmodic torticollis:

One is medicine, one is surgery, and the other is **, physiotherapy, comprehensive**, which is non-surgical. The most common topical ** drug is called botulinum toxin injection, which is selected according to the age of the month, the dose, and the severity of the spasm; Surgery is also one of the most effective methods, mainly to choose contracture for a long time, spasm for a long time or muscle shortening to affect development, do muscle lengthening or cut the nerve root, cut the tendon to lengthen and relieve the role; Non-surgical treatments also include physiotherapy, such as spasmodic muscles, electromyography biofeedback, etc., which can improve and alleviate spasmodic symptoms to varying degrees.

It's better to find a professional to repair this.

The engine display light on the dashboard of the car is on, and there are two cases:

In the first case, it is normal for the engine fault light to turn off after a few seconds of driving, which is a self-test of the car computer, a normal phenomenon, and no need to repair.

In the second case, the engine fault light does not go out after the car, or the fault light suddenly lights up or flashes during driving, which is due to the following reasons:

First. Gasoline oil is not up to standard. Soon after the car finished refueling, the engine fault light lit up on the car dashboard, which was probably due to insufficient combustion caused by unqualified gasoline, and the engine fault light was lit.

Two. Carbon deposition in the spark plug or too long use of the spark plug will lead to poor engine work, difficulty in starting, unstable idling, poor idling, urgent refueling, tempering exhaust exceeding the standard, etc., which will also cause the engine fault light to be lit.

Third. There is also a malfunction of the oxygen sensor, knock sensor or other engine electronic control system, which can also cause the engine fault light to illuminate.