# Service bulletin TSB\_CHA109

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: 10186037
- Published by NHTSA: 2021\-02\-02
- Manufacturer's number: TSB\_CHA109
- Manufacturer's date: 2021\-01\-08
- NHTSA component: STEERING; ELECTRICAL SYSTEM:SOFTWARE

## NHTSA's summary

TECHNICAL SERVICE BULLETIN: SERVICE ACTION: MDPS LOGIC UPDATE FOR DTC C125901 \& C111201 \(SA456\) \- This bulletin provides the procedure to improve the logic of the Electronic Power Steering \(EPS\) software on some 2020MY Rio vehicles produced September 28, 2020 through November 21, 2020, which may exhibit reduced steering assist and MIL ON with DTC\(s\) C125901 and/or C111201.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2021/MC-10186037-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2021/MC-10186037-9999.pdf)

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

## Components

Electrical system, Steering, Software

## Trouble codes named

C1112, C1259

## Vehicles listed

- 2020 KIA RIO

JSON: [/v1/bulletins/10186037](/v1/bulletins/10186037)

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