Subaru Legacy 2018 — technical service bulletin
Bulletin 15-225-18R · NHTSA communication 10166887 · issued Oct 2, 2019
Technical service bulletin
communication type
Electrical System
component
2018
model years
2
vehicle entries
Official summary
This Service Information bulletin provides a procedure to use when diagnosing the infotainment system, a DTC B2242- â UART COMMUNICATIONâ is stored in memory. UART communication occurs between the infotainment head unit (H/U) and the Auto HVAC system control panel.
Vehicles covered
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.