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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.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id10186037
Published by NHTSA2021-02-02
Manufacturer's numberTSB_CHA109
Manufacturer's date2021-01-08
NHTSA componentSTEERING; 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

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Electrical system, Steering, Software

Trouble codes named

C1112, C1259

Vehicles listed
KIA RIO2020

Listing a model year does not mean every vehicle of it is concerned: the document says which.