Diagnostic Aids
WARNING: This page is about a different car, the 2013 Ford Fiesta. However, it is still accessible from the selected car via links, so may be relevant.
If the vehicle speed signal is the cause of the concern, the vehicle speed value in the PSCM sets to a default value and the level of steering assistance will not change as the vehicle speed increases or decreases.
DTC U0401:00 indicates an engine speed or vehicle speed message concern. The module reporting this DTC is not the problem module. Do not install a new PSCM as part of the repair for PSCM DTC U0401:00. The PSCM sends a message to the IPC to display the SERVICE POWER STEERING NOW message in the message center.