What does it mean when the SCR light is on in a truck?
1 Answers
SCR light refers to the Selective Catalytic Reduction system. The following are the reasons why the SCR light is on: The SCR light being on indicates a fault in the Selective Catalytic Reduction system. Here are the reasons that can cause the catalytic reduction system to malfunction: 1. Due to sensor damage. 2. Loose sensor connector. 3. Short circuit or related wiring harness issues. Here is an introduction to the principles of the Diesel Selective Catalytic Reduction (SCR) system: 1. It is used to remove nitrogen oxides from diesel engine emissions. 2. Under high-temperature conditions, the urea injection unit sprays a urea aqueous solution into the exhaust pipe. 3. Urea hydrolyzes at high temperatures to release ammonia, which reacts with nitrogen oxides in the exhaust gas in the SCR catalyst through redox reactions. 4. Nitrogen and water are regenerated, thereby achieving the goal of reducing nitrogen oxide emissions from diesel engines.