This bulletin applies to 2013-2015 Hyundai Veloster vehicles equipped with a 1.6L turbo GDI engine. DTC P0133 (heated oxygen sensor B1S1 – slow response) may be set in the ECU and the check engine light may be on.
The O2 sensor may have developed heavy carbon buildup. The repair requires replacing the O2 sensor and performing an ECU update. You must initially perform GDS ECU update in Auto Mode. If the ECU update starts but then fails in Auto Mode, perform the update in Manual Mode to recover.