Diagnostic Aids

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. When this DTC is set, steering assist is reduced resulting in higher steering efforts during low speed maneuvers.

The presence of DTC U0401:00 prevents the active park assist system (if equipped) and the lane keep assist system (if equipped) from activating. If set during an active park or lane keep assist event, the event is terminated and the assist system is deactivated.