Reductant Injector

The reductant injector is a pulse width modulated (PWM) solenoid controlled directly by the PCM. The injector receives diesel exhaust fluid (DEF) from the reductant pressure line and sprays it into the exhaust stream, where it is mixed into the exhaust gases before entering the selective catalytic reduction (SCR) catalyst.

Courtesy of FORD MOTOR CO.

Typical Reductant Injector