Toyota Sienna Hybrid 2021–2022 — technical service bulletin
Bulletin TTT069722 · NHTSA communication 10220162 · issued May 19, 2022
Technical service bulletin
communication type
Hybrid Propulsion System
component
2021–2022
model years
2
vehicle entries
Official summary
TT: MIL ON with DTC(s) present for Hybrid/EV Battery Cooling Fan Circuit.
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.