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SCR System (Transit)

WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 2018 Ford Transit-350 HD, 2018 Ford Transit-350, 2018 Ford Transit-250, 2018 Ford Transit-150, and 2018 Ford F-550 Super Duty. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: SCR System (Transit) Components Location
G10769107Courtesy of FORD MOTOR CO.
Item Number Description
1 - Reductant Injector
2 - Reductant Pressure Line
3 - SCR Catalyst
4 - Reductant Tank
5 - Reductant Tank Filler Hose
6 - Reductant Pump Assembly

Selective Catalytic Reduction (SCR) System - All Others 

The SCR system reduces nitrogen oxides (NOx) in the exhaust stream by a chemical reduction process using the SCR catalyst and a reductant injection system that introduces diesel exhaust fluid (DEF) into the exhaust system upstream of the SCR catalyst. The reductant injection system is directly controlled and monitored by the PCM. For additional information on the SCR system components, refer to ENGINE CONTROL COMPONENTS .