SCR Emulator is a device that is designed to simulate the real SCR (Selective Catalytic Reduction) system control module. The primary purpose of SCR Emulator module is to keep the truck in regular mode while SCR system is disabled and to save a lot of DEF (Diesel Exhaust Fluid) if it is not necessary to use.
SCR or Selective Catalytic Reduction system designed to reduce NOx (nitrogen oxides) emissions by injecting a DEF or Diesel Exhaust Fluid into the catalytic converter chamber. Selective catalytic reduction systems found in many trucks with EURO 4 environmental standard exhaust systems and absolutely all EURO 5 and EURO 6 trucks equipped with SCR systems.
As you can see EURO standards require selective catalytic reduction, but what if you’re driving your vehicle outside the EU and there are no strict requirements for EURO 4, EURO 5 and EURO 6 standard exhaust system and engine?
You can turn off the SCR system by pulling out the connectors of SCR system, but it will put your vehicle into the limp mode (reduced power), and it will generate a lot of DTC (Diagnostic Trouble Code) errors in your vehicle OBD (On-Board Diagnostics) system. Also, you can make an expensive programming procedure to disable the SCR system by software, but this solution will work until you decide to upgrade the firmware of your truck. Moreover, you’ll need to make reverse programming if you choose to drive your vehicle in the European Union or not EU countries with strict environmental rules. Continue reading SCR Emulator product line, types and compatibility