# Service bulletin T\-SB\-0028\-21

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: 10198129
- Published by NHTSA: 2021\-06\-21
- Manufacturer's number: T\-SB\-0028\-21
- Manufacturer's date: 2021\-05\-11
- NHTSA component: SERVICE BRAKES, HYDRAULIC:FLUID; EQUIPMENT; ELECTRICAL SYSTEM

## NHTSA's summary

TSB: Some 2012 ? 2014 model year Prius C 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. Diagnostic Trouble Codes \(DTCs\) C1391, C1252, C1256, and/or C1253 may also 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/2021/MC-10198129-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2021/MC-10198129-9999.pdf)

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

## Components

Brakes, Electrical system, Equipment and accessories, Brake fluid

## Trouble codes named

C1252, C1253, C1256, C1391

## Vehicles listed

- 2012 to 2014 TOYOTA PRIUS C

JSON: [/v1/bulletins/10198129](/v1/bulletins/10198129)

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