What are the reasons for excessive or rapid consumption of urea solution?

In addition to being related to fuel usage, the consumption of urea aqueous solution is generally influenced by the following reasons:

1. When the nitrogen-oxygen sensor detects that the vehicle's exhaust emissions do not meet the standards, it will inject more urea.

2. Urea nozzle malfunction, resulting in excessive urea injection;

3. Issues with the urea pump, where internal faults can lead to pressure build-up failure, or air-assisted urea pumps are more prone to excessive urea consumption;

4. Issue with the exhaust temperature sensor. If the exhaust temperature sensor malfunctions, urea injection starts before the temperature reaches 180 degrees, which can also lead to excessive urea consumption.

5. Poor quality of vehicle fuel and gas can lead to an increase in harmful gases in the engine's exhaust emissions, thereby requiring more urea to participate in the reaction, resulting in higher urea consumption.

6. Road conditions: If driving on mountainous roads or undulating terrain for extended periods, incomplete combustion in the vehicle's engine can occur, leading to poor exhaust quality and consequently high urea consumption.

7. When the engine itself malfunctions, that is, when the common rail system fails, it can also lead to incomplete combustion, substandard exhaust quality, and ultimately result in high urea consumption.

8. Computer board program issue. Typically, the computer board program limits the amount of urea consumed. If there is a problem with the computer board program, it can also lead to excessive urea consumption.