DTC P22FF - SCR NOx Catalyst Inlet Temperature Too Low

WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 2019 Ford Transit-350 HD, 2019 Ford Transit-350, 2019 Ford Transit-250, 2019 Ford Transit-150, and 2019 Ford F-550 Super Duty. However, it is still accessible from the selected car via links, so may be relevant.

DTC DESCRIPTION P22FF - SCR NOX CATALYST INLET TEMPERATURE TOO LOW

Description:	The PCM compares several vehicle temperature sensor values to determine a calculated exhaust temperature at the inlet of the SCR catalyst. This DTC sets when the difference between the calculated temperature and the actual temperature measured at the exhaust gas temperature bank 1, sensor 2 (EGT12) sensor exceeds a calibrated threshold.
Possible Causes:	EGT12 circuit short to SIGRTN EGT12 circuit short to ground EGT12 circuit short to voltage Exhaust leaks Excessive soot or ash build up on sensor Damaged EGT12 sensor
Diagnostic Aids:	Monitor the EGT12 PID between ignition ON, engine OFF and ignition ON, engine running for an indication of a concern.
Application	Key On Engine Off	Key On Engine Running	Continuous Memory
All	GO to PINPOINT TEST RC .