HYUNDAI

26-FL-003H TSB

2026-07-01 · NHTSA 11034847

A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.

Manufacturer summary

Original wording in English

Some Kona (SX2) vehicles equipped with the 1.6L T‐GDI engine may exhibit false “engine left idling” notifications in the MyHyundai app, even when the engine is not running, due to a logic error associated with the front oxygen (O2) sensor. This condition may also illuminate the Malfunction Indicator Lamp (MIL) and set DTC P223700 (O2 Sensor Pumping Current Circuit/Open [Bank 1 Sensor 1]). This bulletin provides instructions to perform an ECU software update to correct the O2 sensor logic and resolve the condition.

Repeated filings are grouped only when make, bulletin number, publication date and complete summary agree. Original record numbers are retained. Older publications remain available, and an explicit later version is shown when established. Pre-1994 vehicle associations are separated from default results; an unspecified year does not mean all model years apply.