Toyota Avalon 2020 — technical service bulletin
Bulletin 19TC06 - Region · NHTSA communication 10171704 · issued Jan 9, 2020
Technical service bulletin
communication type
Power Train
component
2020
model years
2
vehicle entries
Official summary
Region Email: The engine ECU in the involved vehicles includes certain erroneous transmission related calibration values. As a result, this software does not match the version intended to be used on production vehicles.
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.