Hyundai Santa FE Hybrid 2021–2022 — technical service bulletin
Bulletin 23-01-052H-1 · NHTSA communication 10240088 · issued Jul 18, 2023
Technical service bulletin
communication type
Power Train
component
2021–2022
model years
3
vehicle entries
Official summary
This bulletin provides information related to the cleaning of the cooling system and coolant change to address the following problem: â ¢ â Refill Inverter Coolantâ warning light displayed on the cluster â ¢ No DTCâ s present â ¢ Normal level of coolant in Inverter Reservoir Tank â ¢ Measured EWP Speed > 2,800 RPM The cause of the warning light is due to increased EWP Speed due to poor flow of coolant inside the cooling circuit. The coolant in the system will be discharged and any foreign substances in the circuit will be flushed out with new coolant added in the end. A new reservoir cap label
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.