How to Resolve the Urea Malfunction Indicator Light?
2 Answers
Solutions for the urea malfunction indicator light: 1. If the vehicle exhibits symptoms such as weak acceleration or white smoke from the exhaust pipe, professional equipment should be used to clean the urea crystallization inside the exhaust pipe; 2. If the vehicle's fault code indicates low urea pressure, it is necessary to replenish the urea; 3. If the engine torque is limited, the urea pump and sensors should be replaced. Automotive urea is a diesel exhaust fluid that uses SCR (Selective Catalytic Reduction) technology to reduce nitrogen oxides in diesel vehicle emissions. If the automotive urea is missing or the SCR system malfunctions, the vehicle may show symptoms such as weak acceleration, unresponsiveness to throttle input, insufficient power, and inability to increase engine speed.
Last time when I was driving that diesel pickup truck, the urea warning light also came on, which was really frustrating. After struggling for a while, I found out that the urea nozzle was a bit clogged, or maybe the urea level was too low. When this light comes on, never force yourself to keep driving. Although the vehicle can still run, prolonged driving can cause serious damage to the exhaust pipe. That time, I added half a bucket of qualified urea solution and drove on the highway to flush it, and the light went off halfway. However, I must remind everyone that if the light stays on after adding urea and driving for dozens of kilometers, go to the service station immediately to connect to the computer and read the fault code. Nowadays, some cities are particularly strict with environmental inspections. If you're driving with the light on and get randomly checked, it could be considered as exceeding emission standards.
