Reductant Heaters - All Others
WARNING: This page is about a different car, the 2020 Ford F-550 Super Duty, 2020 Ford F-450 Super Duty, 2020 Ford F-350 Super Duty, 2020 Ford F-250 Super Duty, and 2020 Ford F-150. 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 in this article.