DTC E4 Front Sensor Bus RH Communication Error
WARNING: This page is about a different car, the 2012 Subaru Forester. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
Refer to DTC A1 for DTC E4. < Ref. to
DTC A1 FRONT SENSOR BUS COMMUNICATION ERROR , Diagnostic Chart with Trouble Code. >