Reductant Heaters
WARNING: This page is about a different car, the 2021 Ford F-150. However, it is still accessible from the selected car via links, so may be relevant.
The reductant heaters maintain the DEF (diesel exhaust fluid) in a liquid state during cold ambient temperatures. There is one heating elements in the system, receiving voltage from the GPCM (glow plug control module). 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.