Diagnostic Aids
WARNING: This page is about a different car, the 2017 Lincoln Navigator and 2017 Ford Expedition. However, it is still accessible from the selected car via links, so may be relevant.
During the ignition cycle the DTC sets the following occurs: steering assist is reduced to a default setting, the PSCM transmits an invalid steering angle message over the HS-CAN and the PSCM also sends a message to the IPC to display the SERVICE POWER STEERING in the message center.
During the next ignition cycle after the DTC sets the following occurs: the PSCM removes steering assist and enters into a manual mode, the module transmits an invalid steering angle message over the HS-CAN and the module also sends a message to the IPC to display the SERVICE POWER STEERING NOW in the message center.