Toyota Avalon 2018–2019 — technical service bulletin
Bulletin T-TT-0511-18-Rev · NHTSA communication 10155235 · issued Feb 18, 2019
Technical service bulletin
communication type
Electrical System
component
2018–2019
model years
9
vehicle entries
Official summary
TT: Vehicle control apps might not operate as expected at times due to preconditions (normal operating parameters) not being established, vehicle settings and/or network/cellular coverage concerns.
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.