DTC U1140: Lost Communication With Body Control Module Body-Can
WARNING: This page is about a different car, the 2022 Subaru WRX. However, it is still accessible from the selected car via links, so may be relevant.
DTC detecting condition:
When reception ID frame is not normally and continuously received for 10 seconds during CAN bus Wake-up.
(Including when frame is abandoned by DLC (data length code) check error)
NOTE:
Perform the diagnosis for LAN system. Ref. to LAN SYSTEM (DIAGNOSTICS)>BASIC DIAGNOSTIC PROCEDURE>PROCEDURE