26-FL-003H TSB

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.