# Service bulletin L\-SB\-0001\-21 Rev

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: 10188921
- Published by NHTSA: 2021\-03\-15
- Manufacturer's number: L\-SB\-0001\-21 Rev
- Manufacturer's date: 2021\-02\-11
- NHTSA component: ENGINE AND ENGINE COOLING

## NHTSA's summary

TSB: Some 2013 ? 2017 model year Lexus vehicles may exhibit one of the following HVAC conditions. ?Uneven temperature or air flow between the vents. ?Little or no air flow from the vent\(s\). ?Improper MODE control function. Additionally, some vehicles may store one or more of the following HVAC servo Diagnostic Trouble Codes \(DTCs\). ?B1441 ? Air Mix Damper Control Servo Motor Circuit \(Front Passenger Side Lower Air Mix\). ?B1442 ? Air Inlet Damper Control Servo Motor Circuit. ?B1443 ? Air Outlet Damper Control Servo Motor Circuit. ?B1446 ? Air Mix Damper Control Servo Motor Circuit \(Driver Side Lower Air Mix\). ?B1447 ? Rear Air Mix Damper Control Servo Motor Circuit. ?B1448 ? Passenger Side Face Servo Motor Circuit. ?B1449 ? Rear Air Outlet Damper Control Servo Motor Circuit. ?B1453 ? Driver Side Air Outlet Damper COOL Control Servo Motor Circuit. ?B1454 ? Passenger Side Air Outlet Damper COOL Control Servo Motor Circuit. ?B1455 ? Driver Side Air Outlet Damper FOOT/DEF Control Servo Motor Circuit. Follow the procedures in this bulletin to address this condition.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2021/MC-10188921-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2021/MC-10188921-9999.pdf)

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

## Components

Engine

## Trouble codes named

B1441, B1442, B1443, B1446, B1447, B1448, B1449, B1453, B1454, B1455

## Vehicles listed

- 2016 to 2017 LEXUS GS 200T
- 2013 to 2017 LEXUS GS 350
- 2016 to 2017 LEXUS GS F
- 2013 LEXUS GS HYBRID
- 2016 to 2017 LEXUS GS HYBRID
- 2014 to 2015 LEXUS GS450H
- 2014 to 2015 LEXUS IS 250
- 2016 to 2017 LEXUS IS 300
- 2014 to 2017 LEXUS IS 350
- 2016 to 2017 LEXUS IS200T
- 2016 to 2017 LEXUS RC 200T
- 2016 to 2017 LEXUS RC 300
- 2015 to 2017 LEXUS RC 350
- 2015 to 2017 LEXUS RC F

JSON: [/v1/bulletins/10188921](/v1/bulletins/10188921)

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