Why does the urea light of a heavy truck often come on?

[McAutumn]

The reason why the urea light of a heavy truck often comes on is due to a lack of urea. Below is relevant information about the urea light: 1. Definition: If the vehicle lacks urea or the SCR system malfunctions, the vehicle will exhibit symptoms such as weak acceleration, unresponsiveness to throttle input, and insufficient power. 2. Solutions: If the vehicle shows symptoms of weak acceleration or white smoke from the exhaust pipe, professional equipment should be used to clean the urea crystallization inside the exhaust pipe. If the vehicle's fault code indicates low urea pressure, urea should be replenished. If the engine torque is limited and the RPM cannot exceed 1800 rpm, the urea pump and sensor should be replaced.