TECHNICAL SERVICE BULLETIN: LAMBDA 3.3L GDI ENGINE HESITATION AT HIGH ALTITUDES LOGIC IMPROVEMENT - This bulletin provides the procedure to improve the logic of the Engine Control Module (ECM) on some 2019-2020MY Sorento (UMa) vehicles equipped with a LAMBDA 3.3L GDI engine, produced from January 22, 2018 through July 22, 2020, which may experience engine hesitation when driving at high altitudes, over 6,000 ft. elevation (2000m).
