Lambda 3.3L GDI engine hesitation at high altitudes logic improvement

Bulletin number

TSB_ENG220

Component

Engine and engine cooling

Summary

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).

Owners of these vehicles have filed 242 complaints in the engine category.