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Service bulletin 19-01-034H

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 id10167771
Published by NHTSA2019-11-18
Manufacturer's number19-01-034H
Manufacturer's date2019-10-29
NHTSA componentELECTRICAL SYSTEM:SOFTWARE; ENGINE; ELECTRICAL SYSTEM:12V/24V/48V BATTERY

NHTSA's summary

This bulletin provides information related to an ECM (Engine Control Module) software update to revise battery sensor data for optimized %SOC(State of Charge) value. The ECM Update also includes an update for misfire due to learning cylinder imbalance.

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, Engine, 12-volt battery, Software

Vehicles listed
HYUNDAI VELOSTER2020

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

Other bulletins for the same vehicles and component
22-01-043H2022-06-10. Service bulletin. Hyundai is conducting a service campaign to enhance the knock sensor logic with the Cylinder Noise Diagnostic System (CNDS) software update. CNDS is to detect abnormal cylinder wall scuffing or noise of the engine block before potentially severe engine damage occurs. If abnormal noise is detected, the Malfunction Indicator Lamp (MIL) will blink continuously. In addition, DTC P1327 will be recorded in the ECM.