Hyundai Sonata 2020–2021 — technical service bulletin
Bulletin 23-EE-009H · NHTSA communication 10241875 · issued Aug 21, 2023
Technical service bulletin
communication type
Engine and Engine Cooling
component
2020–2021
model years
2
vehicle entries
Official summary
This bulletin provides warranty procedure for EGR Valve replacement related to DTC P0401 EGR Flow Insufficient on 2020 and 2021MY Sonata (DN8a) equipped with 2.5 GDI Vehicles.
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.