Toyota Sienna 2021–2023 — technical service bulletin
Bulletin T-SB-0018-23 · NHTSA communication 10236206 · issued Apr 19, 2023
Technical service bulletin
communication type
Electrical System
component
2021–2023
model years
6
vehicle entries
Official summary
TSB: Some 2021 ? 2023 model year Sienna Hybrid vehicles may exhibit a MIL ON condition with Diagnostic Trouble Code (DTC) P060694 (Hybrid/EV Powertrain Control Module Processor Unexpected Operation) present. The Hybrid Vehicle Control Computer logic has been modified to reduce the possibility of this condition.
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.