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
5Original wording in English
LEXUS
Reported code forms C1256
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…
LEXUS
Reported code forms C1256
TSB: Some 2016 ? 2019 model year RX 450h vehicles may exhibit a condition where 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…
LEXUS
Reported code forms C1256
RL: Lexus has received reports regarding the Brake Booster and Brake Booster Pump Assemblies on certain 2010 ? 2012 model year RX450H vehicles. These reports have indicated certain internal malfunctions of the Brake…
LEXUS
Reported code forms C1256
TSB: Some 2010 ? 2012 model year RX 450H vehicles may exhibit a condition where the brake, ABS, and/or TRAC warning light(s) are on and/or a Check VSC message displays. Diagnostic Trouble Codes (DTCs) C1391, C1252,…
LEXUS
Reported code forms C1256
TSB: Some applicable Lexus vehicle models may exhibit a condition where the brake, ABS, and/or TRAC warning light(s) are ON and/or a Check VSC message is displayed. Diagnostic Trouble Code (DTC) C1391, C1252, C1253, or…
Check vehicle applicability
13A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
| Make | Model | Model year |
|---|---|---|
| Lexus | RX HYBRID | 2022 |
| Lexus | RX HYBRID | 2021 |
| Lexus | RX HYBRID | 2020 |
| Lexus | RX HYBRID | 2019 |
| Lexus | RX HYBRID | 2018 |
| Lexus | RX HYBRID | 2017 |
| Lexus | RX HYBRID | 2016 |
| Lexus | RX HYBRID | 2015 |
| Lexus | RX HYBRID | 2012 |
| Lexus | RX HYBRID | 2011 |
| Lexus | RX HYBRID | 2008 |
| Lexus | RX HYBRID | 2007 |
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.