Model With Keyless Access With Push Button Start System: DTC Detecting Condition
WARNING: This page is about a different car, the 2016 Subaru Impreza and 2016 Subaru Crosstrek. However, it is still accessible from the selected car via links, so may be relevant.
UART between the TPMS CONTROL MODULE and the body integrated unit is open or shorted, or has communication failure.