This bulletin provides information related to the Engine Control Module (ECM) and Transmission Control Module (TCM) software updates for certain 2018MY SONATA, equipped with 2.0L turbo engine and 8 speed automatic transmission. These vehicles may experience Malfunction Indication Light illumination with any of the following DTC(s) below:
? P219C: Cylinder #1 Imbalance Error
? P219D: Cylinder #2 Imbalance Error
? P219E: Cylinder #3 Imbalance Error
? P219F: Cylinder #4 Imbalance Error
? P0731: Gear 1 Incorrect Ratio
