Reductant Heaters - All Others
WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 2019 Ford Transit-350 HD, 2019 Ford Transit-350, 2019 Ford Transit-250, 2019 Ford Transit-150, and 2019 Ford F-550 Super Duty. However, it is still accessible from the selected car via links, so may be relevant.
The reductant heaters maintain the diesel exhaust fluid (DEF) in a liquid state during cold ambient temperatures. There are two heating elements in the system, each receiving voltage from the reductant dosage control module (Transit Connect) or the glow plug control module (GPCM) (all others). The reductant pressure line heater is integral to the reductant pressure line. The reductant tank heater is integral to the reductant pump assembly. For additional information on the reductant tank heater, refer to the REDUCTANT PUMP ASSEMBLY description.