Ford Transit 2016 2.2 17 seater Minibus.
Engine Management light came on and the Engine service now message too. Had the codes read and it came up with: P204F Reductant System Performance Bank 1.
Symptoms:
-The vehicle struggles to gain power to speed up.
-Engine management light and warning message.
The adblue level in the vehicle is close to full and has never been empty in the vehicle. I have been told by a mechanic that the P204F code refers to a problem with the adblue system.
I've had a DPF problem a few months ago. The DPF was cleaned out in a machine, fitted with a new fuel vapouriser and exhaust gas temp sensor. The DPF was then re-calibrated. The vehicle started working perfectly again.
DPF Cleaning video a few months ago: https://streamable.com/1rvjo6
Regarding this new problem (P204F Reductant System Performance Bank 1) I have booked in with a Ford Transit dealership. I will let you know what they say.