The urea liquid does not burn, the engine fault on the car is bright, and the computer monitors the

First, there is a problem with the quality of urea, and its purity is not enough, and second, the atomization effect of the nozzle is not good, resulting in urea not fully playing the role of removing exhaust gas, and the system will increase the use of urea. However, the damage caused by the oxygen sensor, I hope it can help you!

No.

The fault light is on, indicating that there is a problem with the function of the corresponding component. The general reasons for the post-treatment SCR light to turn on are: insufficient urea amount (you can check whether the urea amount is normal), nitrogen oxygen sensor failure, urea nozzle failure, urea nozzle blockage, urea pump failure lamp.

In the event of a similar failure, professional equipment is generally required for testing, and it is recommended that you go to the nearest 4S shop for repair according to the list attached to the engine maintenance manual.

Precautions for automotive urea.

Regularly check the level of urea solution in the urea tank and add urea solution in time. The dosage of urea solution for vehicles is 4%-6% of diesel oil, and the amount of urea solution is estimated according to the trip, and sufficient barrels of urea should be carried with the vehicle if necessary.

After filling the urea solution, the lid of the urea tank should be tightened to avoid the entry of pollutants in the air, resulting in urea deterioration or crystallization.

Automotive Urea is a diesel exhaust treatment fluid that uses SCR selective catalytic reduction technology to reduce nitrogen oxides in diesel exhaust. If the car's urea is missing or the SCR system fails, the car will show symptoms such as weak acceleration, not stepping on the accelerator, insufficient power, and not going up the engine speed.

Automotive Urea, a liquid used in SCR technology to reduce nitrogen oxide pollution in diesel vehicle exhaust. It is composed of high-purity urea and deionized water. It is used in diesel engines.

It is a liquid used in SCR technology to reduce nitrogen oxide pollution in diesel vehicle exhaust. It is composed of high-purity urea and deionized water. The SCR system includes a urea tank (loaded with diesel engine exhaust treatment fluid), and an SCR catalytic reaction tank.

The operation process of the SCR system is as follows: when nitrogen oxides are found in the exhaust pipe, the urea tank automatically sprays out the diesel exhaust gas treatment fluid.

The diesel exhaust treatment fluid and nitrogen oxides undergo a redox reaction in the SCR catalytic reaction tank to generate pollution-free nitrogen and water vapor discharge. If the diesel exhaust fluid is not loaded, or the purity is not enough, or the quality is poor, the vehicle engine will automatically slow down. At the same time, the inferior diesel exhaust gas treatment fluid can contaminate the catalyst in the SCR catalytic reaction tank, causing serious consequences.

Urea fault lamp industry called post-processing fault alarm, the light is on the car is normal, indicating that there is no big problem with post-processing, such as excessive emissions, low urea liquid level are reported to the fault, the car is normal, if a serious failure occurs, it will be limited after 50 hours from the fault code, I hope to help you.

1. Sensor problems

The sensors mentioned here include water temperature and crankshaft.

Position, air flow, inlet air temperature, oxygen sensor.

etc., diesel filters, urea.

processor, when any of the above sensors are damaged or poorly contacted, or the signal is interrupted, the ECU of the truck cannot accurately obtain the engine data, and the engine fault light will be lit at this time.

2. Maintenance problems

Poor engine maintenance is the most common cause of engine failure to light up. We know that 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 remind you through the fault light that you should care about your car.

3. Orange rot oil quality problem

The oil quality here includes diesel and engine oil, we know that diesel vehicles have entered the era of EFI, and have high requirements for oil, and if the diesel quality of the truck filling is too low, the fault light will also be on. The quality of the engine oil is also very important, try to fill the oil according to the manufacturer's requirements, and it is best to go to the manufacturer's authorized service station to maintain and add oil.

4. Diesel wax is frozen in cold weather in winter

The high melting point contained in diesel fuel is paraffin hydrocarbons.

When the diesel fuel reaches the temperature cloud point, these crystals slowly increase and are connected with each other through its water chestnut to form a triangular network structure, which adsorbs or wraps the oil with a low melting point and makes the oil lose its fluidity. Due to the low temperature in winter, the diesel wax crystallization will coagulate.

It will also cause the filter to be blocked, the oil will solidify, and if the minimum speed required for the engine to start cannot be reached, the engine will be bent and leaked so that the engine cannot run, and the engine fault light will also give an alarm.

5. Air intake problems

When the engine burns, it needs to take in the air, and in the process the air cleaner is required.

It is very important, if the air filter 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 in the long run, and in serious cases, it will cause the engine failure light to turn on.

6. Diesel and urea liquid problems

Diesel and urea liquid are about to be exhausted, but if they are not filled in time, the sensor will alarm that the pressure value is too low, and at the same time, the engine fault light will also light up.

The reason why the engine failure light is on.

1. 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.

2. The fuel quality is not good.

Many riders who find that the engine fault light is on have a feeling: that is, the engine fault light suddenly turns on after adding a tank of fuel. Because the engine has requirements for the quality index of oil, especially as the requirements for the engine are getting higher and higher in various specifications, the quality index of the oil is also getting higher and higher.

3. The engine cylinder is not clean inside, and there must be some carbon deposits inside the engine pants after a certain period of use, which will cause the engine design parameters to change, and its properties are unstable and heat is accumulated, and the accumulated heat will lead to disorderly ignition of the engine, thereby causing engine detonation. In this case, the engine fault light is also illuminated.

The engine fault light is on the solution.

1. Clean the engine.

Once the engine failure light is on, the owner should clean the engine in time, and there are currently two correct cleaning methods:

1) Go to the repair shop to clean the carbon deposits with a special cleaning agent.

2) Clean the entire fuel system with good fuel additives, including removing carbon deposits in the cylinder.

2. Add higher grade gasoline.

After the engine cleaning, because the compression ratio of the current automobile engine that meets the national IV emission standard is generally above, this kind of car is not suitable for long-term gasoline below 95. In order to keep the engine in good working condition, the owner can choose to add 95 or 97 gasoline, which can usually solve the problem of the engine failure light on.

3. Improve fuel quality.

When the engine is cold and starts, the cylinder wall and other parts of the engine are cold metal parts, when the engine is running, the fuel injection of the fuel injection is atomized into the cylinder, and the atomized mixture encounters the cold cylinder wall is condensed on the cylinder wall, which is not conducive to the ignition and combustion of the engine.

If the temperature of the engine wall is very high, the mixture enters the cylinder and encounters the wall of the boiling soup is not condensed and gasified, and the mixture gasified at high temperature is conducive to the combustion of the mixture, which is conducive to the smooth and normal operation of the engine.

Engine shaking means that the mixture inside the cylinder is not completely combusted, and the incomplete combustion of the mixed mu resistant gas will be discharged through the exhaust valve during the engine exhaust process, at this time, an oxygen sensor is installed on the exhaust pipe channel, his function is to check the oxygen content in the exhaust gas, the more fully the mixture is burned in the cylinder, the less oxygen is contained, on the contrary, the oxygen sensor uses this working principle to detect and convert into an electrical signal that the computer can identify to the engine control computer. According to the set software program, the computer then checks the parameters of the working state of the engine through the various sensors on the engine and sends it to the ignition system after correction and calculation, and the work instructions of the fuel injection system are sent to the ignition system, and these systems correct the working parameters to complete the ignition and fuel injection after receiving these work instructions, and the engine has entered the work of ignition and combustion again, so that the work is adjusted repeatedly. When the computer receives the parameters of the oxygen sensor after the exhaust emissions seriously exceed the national legal standards, the internal program of the computer can not be corrected to the standard range, at this time, the engine control computer will send a warning light (yellow pollution light on) through the instrument to remind the owner to the maintenance station to check the cause of the engine pollution emission lamp.

Summary. Hello, glad to answer for you. Will be pro-urea unqualified engine failure oh reason:

The urea lamp is generally due to the lack of urea or the quality of the urea solution used is not up to standard, the urea used in diesel vehicles mainly plays the role of purifying exhaust gas, if the lack of urea is not added in time, it will lead to a decrease in the power of diesel vehicles, and exhaust pollutants will also increase; Secondly, insoluble matter and excessive impurities in the inferior urea solution can cause clogging and damage to the nozzle. Therefore, urea is unqualified and the engine failure is bright.

Hello, very high Liang Juxing answers for you. Will be pro-urea unqualified engine failure oh reason: urea lamp is generally due to the lack of urea or the use of urea solution quality is not up to standard, the urea used in diesel vehicles mainly plays the role of purifying exhaust gas, if the lack of urea is not added in time, it will lead to a decrease in the power of diesel vehicles, and exhaust pollutants will also increase rubber lease; Secondly, the undesirable slubilities and excessive impurities in the inferior urea solution will cause clogging and damage to the nozzle.

Therefore, urea is unqualified and the engine failure is bright.

It should be noted that the total power supply of the vehicle should not be disconnected within at least 30 seconds after the engine is turned off, and the system should discharge the urea solution remaining in the pipeline after the engine is turned off, so as to avoid crystallization and blockage. This phase lasts for 30 seconds and then shuts off automatically. If the user does not add urea or uses low-quality urea, the ECU of the engine will record information about the exceedance of vehicle emissions.

During the annual inspection of the vehicle, the management department can use the special testing equipment to read out the information of the first rental, Cong Zhao and make corresponding penalties in accordance with the regulations.

When the exhaust emissions are abnormal, the urea night light and the engine light will be lit at the same time, in this case, the battery can be powered off for more than half an hour, let the system reset and then try again, or the same problem, you must use the diagnostic instrument into the engine computer to read the fault**, and then repair according to the prompt of the fault code, the common problem is that the post-treatment system is damaged, the nozzle is blocked and the control system is interfered with caused by the problem, this situation is recommended that you repair as soon as possible, Otherwise, a long-term problem with exhaust emissions will cause the engine computer to lock up, resulting in weak acceleration and failure to start.

Summary. Hello, I am your exclusive elite technician, we promise to be attentive, careful, and attentive to answer your car questions. Hello, the vehicle does not burn urea, there is no fault light, there is no fault code, the power is not affected, the reasons include many reasons, such as urea crystals, urea missing, urea sensor damage, SCR system pipeline blockage, etc., the specific situation also to the service station to find professionals for inspection and maintenance.

Specific solutions to urea failure: 1. If the vehicle has symptoms of weak acceleration or white smoke from the exhaust pipe, it is necessary to find professional equipment to clean the urea crystals in the exhaust pipe. 2. If the vehicle breakdown** shows that the urea pressure is low, it is necessary to replenish the urea again.

3. If the engine torque is limited and the speed cannot go up at 1800 rpm, the urea pump and inductor should be replaced.

The vehicle does not burn urea, there is no fault light on, there is no fault code, and the power does not affect, what is going on.

Hello, don't click to end, I'm textual to give you the full answer, 2-3 minutes.

Hello, I am your exclusive elite technician, we promise to be attentive, careful, and concentrate on answering your car questions. Hello, the vehicle does not burn urea, there is no fault light, there is no fault code, the power is not affected, the reasons include many, such as urea crystals, urea missing, urea sensor damage, SCR system pipe Qi rotten road blockage, etc., the specific situation also to the service station to find professionals for inspection and maintenance. Specific solutions to urea failures:

1. If the vehicle has symptoms of weak acceleration or white smoke from the exhaust pipe, it is necessary to find professional equipment to clean the urea crystals in the exhaust pipe. 2. If the vehicle breakdown** shows that the urea pressure is low, it is necessary to replenish the urea again. 3. If the engine torque is limited and the speed cannot go up at 1800 rpm, the urea pump and inductor should be replaced.