Message Center Displays STEERING ASSIST FAULT SERVICE REQUIRED

WARNING: This page is about a different car, the 2019 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: This message appears when a condition has been detected in the EPAS system requiring the PSCM to immediately reduce steering assist, gradually reduce assist or disable assist completely to help prevent the system from sustaining any possible damage. This message (and related symptom) may be cleared when the ignition key is cycled and may not be present at the time of diagnosis.
NOTE: This message may indicate vehicle system voltage is below the threshold required by the EPAS system to provide full assist. The status of the 12-volt battery should be evaluated.

Possible Source	Action
DTCs present in the PSCM	GO to PINPOINT TEST KC