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Service bulletin T-SB-0127-20

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id10185762
Published by NHTSA2021-01-25
Manufacturer's numberT-SB-0127-20
Manufacturer's date2020-12-22
NHTSA componentBACK OVER PREVENTION; SERVICE BRAKES

NHTSA's summary

TSB: Some 2020 model year Highlander and Highlander Hybrid vehicles may experience a sudden loss of air conditioning cooling with Diagnostic Trouble Code (DTC) B1423 (Open in Pressure Sensor Circuit/Abnormal Refrigerant Pressure) present. Follow the Repair Procedure in this bulletin to address these conditions.

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Brakes, Driver assistance, Backup camera

Trouble codes named

B1423

Vehicles listed
TOYOTA HIGHLANDER2020

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Other bulletins for the same vehicles and component
T-SB-0115-22 Rev2023-04-17. Service bulletin. TSB: Some 2019 ? 2022 model year Avalon, 2018 ? 2023 model year Camry, 2017 ? 2022 model year Highlander, and 2017 ? 2020 model year Sienna vehicles equipped with a 2GR-FKS engine may exhibit a knocking noise from the vacuum pump at idle.
TTT0636202022-06-21. Service bulletin. TT: Some Toyota vehicles installed with Toyota Complete Maintenance Care (TCMC) brake pads may exhibit a groan or squeak noise in various driving conditions
T-TT-0599-20 Rev2021-04-19. Service bulletin. 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.
T-TT-0636-20 Rev2021-04-19. Service bulletin. TT: Some Toyota vehicles installed with Toyota Complete Maintenance Care (TCMC) brake pads may exhibit a groan or squeak noise in various driving conditions.
T-SB-0146-19 Rev2021-02-16. Service bulletin. TSB: Some 2020 ? 2021 model year Tundra vehicles equipped with Audio Plus (version 1186) or earlier may exhibit one or more of the following conditions: ?WiFi intermittently inoperative. ?DTC B15DB present. ?Changing the Auto Relock Timer setting also changes the Remote 2-Press unlock setting. Some 2020 ? 2021 model year Tundra, RAV4, RAV4 Hybrid, Highlander, or Highlander Hybrid vehicles equipped with Audio Plus (version 1210), or Premium Audio (version 1196) or earlier may exhibit one or more of the following conditions: ?Intermittent screen flashing. ?Intermittent ?Destination Assist Unavailable? pop-up message. ?Intermittent blank screen. ?Bluetooth® intermittently disconnects. ?Abnormal radio playback after Destination Assist Call. ??There is no playable data? pop-up message when using USB Audio. ?Unable to answer phone calls when using Apple CarPlay®. ?Clock displays the incorrect time. ?Intermittent rebooting. ??The software version doesn?t correspond? pop-up is intermittently displayed. ?Intermittent black screen when using projection navigation. ?Abnormal noise after ACC OFF/ON when using AM mode and high volume. ??Please connect USB? pop-up message when USB is already connected. A software update is now available to address these conditions. Follow the Software Update Procedure in this bulletin to update the software.
T-TT-0599-20 Rev2021-02-16. Service bulletin. 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.
T-TT-0636-202021-02-16. Service bulletin. TT: Some Toyota vehicles installed with Toyota Complete Maintenance Care (TCMC) brake pads may exhibit a groan or squeak noise in various driving conditions.