Hyundai Elantra 2018–2019 — technical service bulletin
Bulletin 20-01-008H · NHTSA communication 10172215 · issued Feb 13, 2020
Technical service bulletin
communication type
Electrical System
component
2018–2019
model years
2
vehicle entries
Official summary
This bulletin provides information related to the Engine Control Module (ECM) software update for 2018 - 2019MY Elantra (AD/ADA) vehicles equipped with 2.0L engine. This software update includes cylinder imbalance learning logic optimization for Malfunction Indicator Light illumination with DTC P0300/P0301/P0302/P0303/P0304 (Cylinder â Xâ â misfire detected).
Vehicles covered
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.