Hyundai IONIQ Hybrid 2021–2022 — technical service bulletin
Bulletin 24-EV-001H · NHTSA communication 10252364 · issued Mar 12, 2024
Technical service bulletin
communication type
Electrical System
component
2021–2022
model years
4
vehicle entries
Official summary
This bulletin provides the procedure to update the ECU software on certain 2021-2022MY IONIQ Plug-in Hybrid (AE PHEV) vehicles that may exhibit a warning light with DTC U1341 due to communication issues with the Integrated Electronic Brake (IEB) during charging in IG3 mode. Follow the procedure in this TSB to update the ECU software logic. â ¢ DTC Info: U1341 - ECU-IEB Communication Delay
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.