Hyundai Sonata 2020 — technical service bulletin
Bulletin 21-01-009H · NHTSA communication 10188246 · issued Feb 11, 2021
Technical service bulletin
communication type
Electrical System
component
2020
model years
1
vehicle entries
Official summary
This bulletin provides information related to an Electronic Control Module (ECM) software update which revises detection logic for DTC P2422: EVAP System Restricted Vent Valve logic.
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.