2015 Jeep Grand Cherokee Owner Manual Supplement - Page 66

64 STARTING AND OPERATING DIESEL EXHAUST FLUID System Overview Your vehicle is equipped with a Selective Catalytic Re- This vehicle is equipped with a Diesel Exhaust Fluid duction system to meet the very stringent diesel emis- (DEF) injection system and a Selective Catalytic Reducsions standards required by the Environmental Protec- tion (SCR) catalyst to meet the emission requirements. tion Agency. The DEF injection system consists of the following comThe purpose of the SCR system is to reduce levels of NOx ponents: (oxides of nitrogen emitted from engines) that are harm- • DEF tank ful to our health and the environment to a near-zero level. Small quantities of Diesel Exhaust Fluid (DEF) is injected • DEF pump into the exhaust upstream of a catalyst where, when • DEF injector vaporized, it converts smog-forming nitrogen oxides (NOx) into harmless nitrogen (N2) and water vapor • Electronically-heated DEF lines (H2O), two natural components of the air we breathe. • NOx sensors You can operate with the comfort that your vehicle is contributing to a cleaner, healthier world environment • Temperature sensors for this and generations to come. • SCR catalyst