Toyota Highlander 2022–2024 — technical service bulletin
Bulletin T-SB-0050-24 Rev1 · NHTSA communication 11010334 · issued Oct 8, 2024
Technical service bulletin
communication type
Electrical System
component
2022–2024
model years
4
vehicle entries
Official summary
Some 2022 – 2024 model year Tundra and 2023 model year Highlander vehicles may exhibit a MIL ON condition with Diagnostic Trouble Codes (DTCs) P162B87 (Lost Communication with Battery Monitor Module Missing Message) and/or P15AD87 (Active Grille Air Shutter "A" Missing) present. The battery state sensor assembly has been updated to prevent the condition from occurring.
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.