What happens if a China VI vehicle runs without urea?

[Lois]

China VI vehicle running without urea will experience the following issues: 1. Reduced power: This is not a direct result of not adding urea, but because the engine's electronic control system cannot detect urea injection. When exhaust pollution exceeds standards, it will forcibly limit the engine's torque output. 2. Damage to the SCR injection system: If urea is not used for a long time, the nozzles, pipelines, and urea pump in the SCR system may crystallize and clog, or be damaged by high temperatures. 3. Excessive emissions: The primary purpose of adding urea is to reduce carbon and nitrogen compound emissions. Without urea, emissions will exceed standards, causing environmental pollution.