5NP-R6Y5M-01

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