DTC U0557: Invalid Data Received From Front Controls Interface Module "A": Action
WARNING: This page is about a different car, the 2017 Ford Edge. However, it is still accessible from the selected car via links, so may be relevant.
This DTC sets if the SECM receives invalid data from the steering wheel heat request message. Using a diagnostic scan tool, RETRIEVE and DIAGNOSE all FCDIM DTCs. REFER to the appropriate Information and Entertainment System article. If no DTCs are set in the FCDIM, the concern may be intermittent. SET the ignition to OFF. DISCONNECT and INSPECT all FCDIM electrical connectors and related in-line connectors for corrosion, bent pins, pushed-out pins and spread terminals. REPAIR as necessary.