168 STARTING AND OPERATING L OOSE F UEL F ILLER C AP M ESSAGE Tighten the fuel filler cap until you hear a “clicking” sound. This is an indication that the fuel filler cap is properly tightened. The DEF injection system consists of the following components: If the vehicle diagnostic system determines that the fuel filler cap is loose, improperly installed, or damaged, a loose gASCAP indicator will display in the instrument cluster telltale display area Ъ page81. Tighten the fuel filler cap properly and push the RIGHT button to turn off the message. If the problem continues, the message will appear the next time the vehicle is started.
REFUELING THE VEHICLE — DIESEL ENGINE DEF tank Make sure that the fuel filler cap is tightened each time the vehicle is refueled. D IESEL E XHAUST F LUID DEF pump DEF injector Electronically-heated DEF lines Your vehicle is equipped with a Selective Catalytic Reduction (SCR) system to meet the very stringent diesel emissions standards required by the Environmental Protection Agency. DEF control module NOx sensors Temperature sensors WARNING! The purpose of the SCR system is to reduce levels of NOx (oxides of nitrogen emitted from engines) that are harmful to our health and the environment to a near-zero level.
A small quantity of Diesel Exhaust Fluid (DEF) is injected into the exhaust upstream of a catalyst where, when vaporized, it converts smog-forming nitrogen oxides (NOx) into harmless nitrogen (N2) and water vapor (H2O), two natural components of the air we breathe. You can operate with the comfort that your vehicle is contributing to a cleaner, healthier world environment for this and generations to come. System Overview SCR catalyst UQS Sensor A fire may result if gasoline is pumped into a portable container that is inside of a vehicle. You could be burned. Always place gas containers on the ground while filling. For system messages and warnings Ъ page81. NOTE:
Your vehicle is equipped with a DEF injection system. You may occasionally hear an audible clicking noise. This is normal operation. CAUTION! The DEF pump will run for a period of time after engine shutdown to purge the DEF system. This is normal operation. Diesel Exhaust Fluid Storage To avoid fuel spillage and overfilling, do not “top off” the fuel tank after filling. NOTE: This vehicle is equipped with a Diesel Exhaust Fluid (DEF) injection system and a Selective Catalytic Reduction (SCR) catalyst to meet the emission requirements. Diesel Exhaust Fluid (DEF) is considered a very stable product with a long shelf life.
If DEF is kept in temperatures between 10° and 90°F (-12° and 32°C), it will last a minimum of one year. When the fuel nozzle “clicks” or shuts off, the fuel tank is full.