Question

2011 Ford Truck Super Duty 7.0L, P20E8 Reductant Pressure Too Low, what does this mean?

Answer 1

Two areas cause this code to set the reductant pressure or the reductant pump. More than anything it would be the reductant pump that happens in many cases the fluid leaks internally into the pump which renders it to produce low pressure. You can find more information about the engine code on the following links:

P20E8 FORD - Reductant Pressure Too Low
Read more: https://www.autocodes.com/p20e8_ford.html