# Service bulletin T\-SB\-0024\-19

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: 10158575
- Published by NHTSA: 2019\-04\-15
- Manufacturer's number: T\-SB\-0024\-19
- Manufacturer's date: 2019\-03\-06
- NHTSA component: SERVICE BRAKES, HYDRAULIC; SERVICE BRAKES, HYDRAULIC:ANTILOCK/TRACTION CONTROL/ELECTRONIC LIMITED SLIP:ABS WARNING LIGHT

## NHTSA's summary

TSB: Some 2011 ? 2015 model year Prius and 2012 ? 2015 model year Prius Plug\-in Hybrid 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, C1256, and C1253 may be stored. This condition may be caused by a small internal brake fluid leak inside the brake booster assembly with master cylinder. Follow the Repair Procedure in this bulletin to address this condition.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2019/MC-10158575-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2019/MC-10158575-9999.pdf)

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

## Components

Brakes, Anti\-lock brakes

## Trouble codes named

C1252, C1253, C1256, C1391

## Vehicles listed

- 2011 TOYOTA PRIUS
- 2013 TOYOTA PRIUS C
- 2012 to 2015 TOYOTA PRIUS V

## Other bulletins for the same vehicles and component

- [T\-SB\-0115\-20](/bulletins/10184562.md), 2020-12-21, Service bulletin: ELECTRICAL SYSTEM; SERVICE BRAKES, AIR:ANTILOCK:ABS WARNING LIGHT; TRACTION CONTROL SYSTEM. TSB: Some 2015 model year Prius V 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, C1256, or C1253 may be stored. This condition may be caused by a small internal brake fluid leak in the brake booster assembly with master cylinder. Follow the Repair Procedure in this bulletin to address this condition.
- [T\-SB\-0089\-20](/bulletins/10181799.md), 2020-10-26, Service bulletin: SERVICE BRAKES, AIR:ANTILOCK:ABS WARNING LIGHT; TRACTION CONTROL SYSTEM; ELECTRICAL SYSTEM. TSB: Some 2012 ? 2014 model year Prius V hybrid 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, C1256, or C1253 may be stored. This condition may be caused by a small internal brake fluid leak inside the brake booster assembly with master cylinder. Follow the Repair Procedure in this bulletin to address this condition.
- [TSB\-0363\-10](/bulletins/10037647.md), 2011-06-02, Service bulletin: SERVICE BRAKES, AIR:ANTILOCK:CONTROL UNIT/MODULE. TOYOTA: WHEN STOPPED THERE MAY BE AN ABNORMAL NOISE WHEN THE BRAKE PEDAL IS RELEASED. THIS IS A SOFTWARE PROBLEM. 2010\-2011 PRIUS. \*RM

JSON: [/v1/bulletins/10158575](/v1/bulletins/10158575)

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