What is the reductant pump?
What is the reductant pump? Ford uses the term "reductant pump assembly" to describe the DEF pump which is mounted to the top of the DEF heater / sender assembly. It contains a diaphragm pressure pump, pressure sensor, purge valve, outlet filter, and internal heating element. How to check the engine light on a 2015 Ford F250? 2015 F250-6.7L diesel. Check engine light on.2 codes after scanning P04DB-crankcase ventilation system disconnected. 2015 F250-6.7L diesel. Check engine light on.2 codes after scanning P04DB-crankcase ventilation system disconnected. - Answered by a verified Ford Mechanic We use cookies to give you the best...