What is the reason for the yellow light on the engine of the dashboard?

Reasons why the dashboard shows the engine yellow light:

1. When the car is turned on, the vehicle will perform a self-testAt this time, not only the yellow engine light will be on, but other fault lights will also be lit together, and then they will be extinguished together;

2. After the car starts, the yellow light of the engine fault is still onThis is the ECU alerting the engine to a fault. For example, when these sensors are damaged, poor contact or signal interruption, the ECU of the car cannot accurately obtain the engine data, and the engine fault light will be on.

Instrument panel engine fault lights.

This indicator light shows the operating status of the engine, is yellow or red, of course, after screwing the key, the car turns itself on when it tests itself, and automatically turns off when the car starts, and the engine fault indicator often does not disappear automatically after it is turned on.

Engine fault information is sent by the ECU, the electronics that control the entire engine, the motor is the most important part of the car, and the sensors are so complex that what is wrong can only be detected by a computer.

After powering on, the vehicle will have a self-test program, when the self-test will be automatically extinguished after a few seconds of ignition, there are generally two signs that are not extinguished, one is the handbrake prompt, one is the seat belt prompt, if the other is not extinguished, it means that the self-test has not passed, you need to go to the store with a special computer to detect the cause of the fault and eliminate the fault code. Hope mine will be helpful to you.

The engine fault light is on yellow, and you should go to an auto repair center

1. When the engine fault light on the dashboard is on, you can try to start and turn off the vehicle three times in a row, or turn off the negative pole of the engine battery, wait for 30 seconds and then connect it, and then try to start. After doing the above method, see if the engine fault light on the dashboard is still on.

2. It should be noted that when the engine fault light on the general dashboard is on, it cannot be manually eliminated, and it can usually be eliminated after using a fault detector in the 4S store for troubleshooting. The above method is only for the false fault phenomenon of the engine, if it does not work after trying, please also go to a special repair shop to check and eliminate.

The reasons why the yellow light of the engine on the dashboard are as follows:

1. Sensor problems.

Sensors 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 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. Vehicles have 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 be reminded by turning on the yellow light.

3. Oil quality problems.

Oil quality includes fuel and engine oil, the fuel filled by the car is generally marked, and the engine oil is also semi-synthetic and fully synthetic, manufacturers generally recommend the owner to use which grade of fuel, what type of 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.

4. Poor combustion of mixed gas.

Flower plug failure, ignition coil failure, fuel pump failure, oil circuit blockage, etc. will cause poor combustion of engine mixture. Poor combustion of the mixture is caused by engine carbon deposition or knocking problems, and these will eventually be detected by the engine's oxygen sensor, and after being reported to the ECU, the fault light will naturally be lit as a warning.

5. False failure.

Bumping on a potholed road or tampering with a plug on the engine can also cause the engine to turn on a yellow light. This kind of only needs to go to the 4S store and use a fault detector to clear the fault**.

Answer: Hello pro The reasons why the engine failure light of the truck lights up are as follows: 1. Gasoline quality problems: There is a problem with the added gasoline or too much carbon deposit in the engine, resulting in insufficient combustion of the oil-gas mixture when the engine is working.

Problems such as clogged carbon deposits in the fuel injector or intake valve will cause a fault light alarm, which is generally related to the quality of the oil that the user refuels. Generally, at this time, it is necessary to check the engine in time and find the nearest vehicle repair shop for maintenance. 2. Oxygen sensor failure, the oxygen sensor of the engine is faulty, this fault will generally make the engine fault light light light yellow, which will not affect the normal driving, remember to check the reason why the engine fault light is on.

Ask if there is any danger.

Can I continue to ask a question?

The chimney is smoking.

Question: There is another question: the small truck burns oil and returns to a piece of more than a kilometer.

The car dashboard is a device that reflects the working conditions of each system of the vehicle. Common ones are fuel indicators, cleaning fluid indicators, electronic throttle indicators, front and rear fog light indicators and alarm lights. The fault on the dashboard of the car can not only monitor the condition of the vehicle in real time, but also the most direct manifestation of the driving state of the car.

The most complete collection of car fault lights in history, I hope it will be helpful to all car owners. Really recommend collecting it!

Generally, there are 4 colors of car indicators: red, yellow, green and blue; Different colors have different meanings. Do you know?

Red indicator (hazard).

The red indicators are all fault warning lights, so if you see the car indicator light turning red, you need to stop driving immediately, and immediately clear the fault and repair it immediately. The red warning lights mainly include: oil pressure warning light, engine temperature warning light, charging warning light and brake fluid level warning light.

Yellow indicator light (early warning, precaution).

The appearance of the yellow indicator light means that there is a safety hazard in your vehicle, such as a broken light bulb on the car, the "bulb warning light" will continue to flash to prompt replacement, as well as engine (exhaust system) fault lights, oil system fault lights, battery and power generation system fault lights, etc. When the yellow indicator light is on, the owner should pay attention and deal with the repair at the appropriate time.

Green indicator light (safe driving).

The green indicator is the function indicator of the vehicle, which is generally the status indication of the vehicle's function, indicating that the function is on or off, for example, the turn signal flashing when turning is green.

Blue indicator light (reminder, need to pay attention).

Like the green indicator, the blue indicator of the high beam indicator and the internal circulation indicator can generally also play a role in prompting the working status of each function of the vehicle. For example, if the high beams are blue when they are turned on, you need to pay attention to whether the high beams affect other vehicles.

The picture below is a partial general-purpose fault light**:

The yellow one is the tire pressure monitoring light 1Check whether the tire is punctured, caused by the tire pressure monitoring light on2The tire pressure monitoring light is on due to high or low tire pressure.

Poor engine combustion condition is the key reason why the engine problem light is on.

The reasons for the yellow light of the engine on the dashboard of the car are: 1. Poor gasoline quality; 2. Failure of oxygen sensor and air flow sensor; 3. Spark plug carbon deposit; 4. Engine knocking; 5. The water temperature sensor is damaged; 6. The engine lacks cylinders.

The solution to the yellow light of the engine on the dashboard of the car is: 1. Replace the matching gasoline; 2. Replace oxygen sensor, air flow sensor, engine, and water temperature sensor; 3. Clean the spark plugs.

Different cars have different gauges. However, the conventional instruments of general automobiles include speedometer, tachometer, oil pressure gauge, water temperature gauge, fuel gauge, charging gauge, etc. There are two coils inside the fuel gauge.

respectively in"f" with"On the e" side, the sensor is a variable resistor controlled by the height of the float. The change in resistance determines the strength of the magnetic field lines of the two coils, which also determines the deflection direction of the pointer.

A variety of indicators or warning lights are made under the instrument panel of modern automobiles, such as coolant level warning light, fuel level indicator, washer liquid level indicator, charging indicator, high and low beam dimming indicator, transmission gear indicator, brake anti-lock braking system (ABS) indicator, drive force control indicator, airbag (SRS) warning light, etc.

Answer pro. Hello! There are two situations when the engine yellow light on the dashboard is on, the first is when we turn on the power of the car, the vehicle will carry out a self-test, at this time, not only the engine yellow light will be on, but other fault lights will also be lit together, and then they will be extinguished together, which is a normal phenomenon; The second is that after the car starts, the yellow light of the engine fault is still on, which is the ECU reminding you that the engine is faulty, which is an abnormal phenomenon.

The causes of the yellow light of the engine of a car dashboard are faulty aerobic sensor, faulty air flow sensor, carbon build-up in spark plugs, and damaged water temperature sensor. The yellow light of the engine indicates that the engine is faulty, which is a problem that cannot be ignored, which is directly related to engine life and safe driving. Oxygen sensor failure:

Most cars are equipped with two oxygen sensors, one at the front and one at the front and one at the front of the three-way catalytic converter. The function of the front oxygen sensor is to check the air-fuel ratio of the engine under different operating conditions, and at the same time, the ECU computer adjusts the amount of fuel injected and calculates the ignition time according to this signal. The key to the rear is to check how well the three-way catalytic converter is working.

If the oxygen sensor is damaged or the sensor plug is damaged or loose, it will affect the mixture to be too thin or too thick, then the fault problem light will be on. The solution is to replace the oxygen sensor. Air Flow Sensor Failure:

The air flow meter converts the amount of air inhaled into an electrical signal and transmits it to the engine computer, and the ECU indirectly determines the amount of fuel according to the optimal air-fuel ratio. If there is a problem with the air flow sensor or circuit, the engine computer will not get an accurate intake signal, then the normal fuel volume adjustment will not be implemented, and the mixture will be too thin or too thick, the engine will not work properly, and sometimes the engine fault problem light will be lit. The solution is to replace the air flow sensor.

Spark plug carbon deposit: The uneven quality of fuel on the market and the congestion of urban spark plugs are very easy to cause carbon deposits, which will lead to poor engine work, abnormal phenomena such as difficult starting, unstable idling, poor acceleration, excessive exhaust gas, and increased fuel consumption. The solution is to clean up the spark plug deposits.

Water temperature sensor damage: There is a thermistor inside the water temperature sensor, the lower the temperature, the higher the resistance, the higher the temperature, the lower the resistance. When the water temperature of the engine is low, the water temperature sensor inputs the water temperature information of the ECU to make the air-fuel ratio thicker, so that the engine will work stably.

If the water temperature sensor does not send out the information of the chiller status at this time, the air-fuel ratio will be thinner, which will affect the rotation of the engine. Similarly, if the cooler message is sent out after the warm-up, the air-fuel ratio will become thicker, and the engine may not work properly. The solution is to replace the water temperature sensor.

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.

That's a warning light, and it's normal if it's not on after the ignition is done. If it is always on, it means that there is a problem with the engine, it may be a line failure, a line or something, and it may be a fault of the engine itself, but this kind of problem can only be judged by a special computer detection. It is recommended that you go to the 4S store for testing, and generally the 4S store is free to do this kind of testing. Hope.