Hyundai Santa FE 2021–2022 — technical service bulletin
Bulletin 22-HC-002H · NHTSA communication 10218637 · issued Aug 4, 2022
Technical service bulletin
communication type
Electrical System
component
2021–2022
model years
3
vehicle entries
Official summary
This bulletin addresses a warning light â  Refill Inverter Coolantâ  displayed on the instrument cluster, but inspection of the under hood blue coolant reservoir is found to be at normal level (not below â  MINâ  marking on the reservoir bottle). This may be caused by poor flow of antifreeze inside the low-conductivity coolant pipe from internal debris, resulting in unusual high EWP operation being detected. Follow the procedure outlined in this bulletin to flush/discharge debris from the cooling system and replace the blue coolant. To effectively resolve, the flushing must be perf
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.