DTC U0100: Lost Communication With ECM/PCM "A": Action

WARNING: This page does not describe the selected car, but rather 12 other vehicles, including the 2018 Lincoln MKX, 2018 Lincoln Continental, 2018 Ford F-550 Super Duty, 2018 Ford F-450 Super Duty, and 2018 Ford F-350 Super Duty. However, it is still accessible from the selected car via links, so may be relevant.