When the urea fault light is on, it usually means that the nitrogen and oxygen sensor is faulty and the urea nozzle is faulty. Users are advised to replace the plugs of urea pump and power module.
After changing clothes, the urea fault code can be cleared again, but only the sensor power supply 3 cannot be cleared. Sensor power supply analysis 3 refers to the internal power supply module of ECU, replacement of rail pressure sensor and troubleshooting.
Similar faults generally need professional equipment to detect. It is recommended to go to the nearest service station for inspection and maintenance according to the list attached to the engine maintenance manual, and the maintenance will be free during the three-guarantee period. The maintenance staff will help the user to manually eliminate it.
Truck urea function:
Urea for vehicles plays a key role in the power and fuel consumption of vehicles. If diesel tail gas treatment solution is not loaded, or urea solution with poor purity and quality is used, the vehicle starter will slow down actively. At the same time, the inferior diesel tail gas treatment liquid will pollute the catalyst in the SCR catalytic reaction tank, resulting in the damage of the components of the aftertreatment system.
The qualified urea solution is NOX, which consists of 32.5% ultra-pure urea and pure water. Vehicle urea solution is converted into nitrogen, oxygen and water through selective catalytic recovery reaction with NOX products, thus reducing the emission of nitrogen oxides. It is suitable for all diesel engine SCR systems with Euro IV and Euro V emissions.