Hyundai IONIQ Hybrid 2017–2019 — technical service bulletin
Bulletin 19-01-030H · NHTSA communication 10167262 · issued Oct 28, 2019
Technical service bulletin
communication type
Engine and Engine Cooling
component
2017–2019
model years
3
vehicle entries
Official summary
"Certain 2017-2019 vehicles may experience check engine light â  ONâ  with the following DTC stored: DTC P0456 - Evaporative System (EVAP) - Very Small LeakThese conditions primarily occur in the California coastal areas that are subject to marine layer cloud cover. Salt particulate deposit can form inside the Natural Vacuum Leak Detection (NVLD) which may cause intermittent operation prompting the DTC P0456 and the check engine light â  ONâ  . This bulletin provides the procedure to install a new Air Filter Kit with an updated filter to help prevent entry of the salt particulates.
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.