Diagnostic Aids
WARNING: This page is about a different car, the 2016 Lincoln MKS. However, it is still accessible from the selected car via links, so may be relevant.
DTC U0126:00 indicates a possible failure of the HS-CAN which can be due to a circuit fault in the HS-CAN, the PSCM wiring harness or a SCCM concern.
Do not install a new PSCM as part of the repair for a PSCM DTC U0126:00.
When the PSCM sets this DTC, power steering assist is present, but active park assist (if equipped) is disabled.
The presence of DTC U0126:00 prevents the active park assist system (if equipped) and the lane keep assist function (if equipped) from activating. If set during an active park assist event, the event is terminated and the active park assist system is deactivated.