# 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.

- Type: Service bulletin
- NHTSA id: 10185762
- Published by NHTSA: 2021\-01\-25
- Manufacturer's number: T\-SB\-0127\-20
- Manufacturer's date: 2020\-12\-22
- NHTSA component: BACK 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

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2020/MC-10185762-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2020/MC-10185762-9999.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Brakes, Driver assistance, Backup camera

## Trouble codes named

B1423

## Vehicles listed

- 2020 TOYOTA HIGHLANDER

## Other bulletins for the same vehicles and component

- [T\-SB\-0115\-22 Rev](/bulletins/10234314.md), 2023-04-17, Service bulletin: BACK OVER PREVENTION; FUEL SYSTEM, GASOLINE. 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.
- [TTT063620](/bulletins/10214323.md), 2022-06-21, Service bulletin: BACK OVER PREVENTION; SERVICE BRAKES, HYDRAULIC. 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 Rev](/bulletins/10190459.md), 2021-04-19, Service bulletin: ELECTRICAL SYSTEM; BACK OVER PREVENTION. 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 Rev](/bulletins/10190453.md), 2021-04-19, Service bulletin: BACK OVER PREVENTION; SERVICE BRAKES. 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 Rev](/bulletins/10187274.md), 2021-02-16, Service bulletin: SEAT BELTS; BACK OVER PREVENTION. 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 Rev](/bulletins/10187264.md), 2021-02-16, Service bulletin: BACK OVER PREVENTION:SOFTWARE. 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](/bulletins/10187241.md), 2021-02-16, Service bulletin: BACK OVER PREVENTION; SERVICE BRAKES. TT: Some Toyota vehicles installed with Toyota Complete Maintenance Care \(TCMC\) brake pads may exhibit a groan or squeak noise in various driving conditions.

JSON: [/v1/bulletins/10185762](/v1/bulletins/10185762)

[Report an error on this page](https://github.com/wenmar-pro/wenmar-open/issues/new?template=data_correction.yml&title=Data%20correction%3A%20Service%20bulletin%20T-SB-0127-20&page=https%3A%2F%2Fopen.wenmarpro.com%2Fbulletins%2F10185762&vehicle=Service%20bulletin%20T-SB-0127-20)