What does this code mean?
The wording below belongs to the named make and communication. Match the complete code, reporting module, model year and engine before applying it.
A code identifies a detected condition, not a part that must automatically be replaced.
Manufacturer communications
29Original wording in English
LEXUS
Reported code forms C1391
Some 2018 – 2023 model year LC 500, and LC 500h, 2021 – 2023 model year LC 500c, 2018 – 2023 model year LS 500, and LS 500h, 2015 model year RX 450h, and 2018 – 2022 model year RX 450h vehicles may exhibit a condition…
TOYOTA
Reported code forms C1391
Some 2017 – 2019 model year Highlander Hybrid vehicles may exhibit a condition in which the brake, ABS, and/or TRAC warning lights are on and/or a Check VSC message displays. One or more of the following specific…
LEXUS
Reported code forms C1391
Some 2016 – 2018 model year GS 450h, 2013 – 2016 model year LS 600h, and 2018 – 2021 model year NX 300h vehicles may exhibit a condition in which the brake, ABS, and/or TRAC warning lights are on and/or a Check VSC…
TOYOTA
Reported code forms C1391
This Customer Support Program provides coverage as it applies to Brake Booster and Brake Booster Pump Assemblies on Certain 2014-2016 Model Year Highlander HV and certain 2017 Model Year Prius V Vehicles. The specific…
LEXUS
Reported code forms C1391
TSB: Some 2014 ? 2017 model year CT 200h vehicles may exhibit a condition in which the brake, ABS, and/or TRAC warning lights are on and/or a Check VSC message displays. One or more of the following specific Diagnostic…
TOYOTA
Reported code forms C1391
TSB: Some 2014 ? 2016 model year Highlander Hybrid vehicles may exhibit a condition in which the brake, ABS, and/or TRAC warning lights are on and/or a Check VSC message displays. One or more of the following specific…
Check vehicle applicability
135A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
| Make | Model | Model year |
|---|---|---|
| Lexus | CT HYBRID | 2017 |
| Lexus | CT HYBRID | 2016 |
| Lexus | CT HYBRID | 2015 |
| Lexus | CT HYBRID | 2014 |
| Lexus | CT HYBRID | 2013 |
| Lexus | CT HYBRID | 2012 |
| Lexus | CT HYBRID | 2011 |
| Lexus | ES HYBRID | 2015 |
| Lexus | ES HYBRID | 2014 |
| Lexus | ES HYBRID | 2013 |
| Lexus | GS HYBRID | 2018 |
| Lexus | GS HYBRID | 2017 |
Before replacing a part
Record codes and freeze-frame data. Check battery condition, related codes and visible wiring or hose damage. Follow the vehicle's diagnostic procedure and test results before replacing parts.
Can I keep driving?
A code alone cannot establish whether driving is safe. A flashing malfunction light, severe shaking, overheating, oil-pressure warning or loss of braking or steering needs prompt attention. Stop in a safe place and seek assistance when control or engine safety is affected. Follow the vehicle handbook.