Service bulletins for the 2019 Hyundai Ioniq
A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.
84 on file from NHTSA, as of 2026-10-19.
About P1B77 on the 2019 Hyundai Ioniq: what the code means, and the bulletins and recalls about the same components.
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Only bulletins with trouble code: P1B77 are shown. Show all
| Campaign T3U Dea | 2019-09-30. Service bulletin. ELECTRICAL SYSTEM:12V/24V/48V BATTERY; EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. This service campaign provides information related to a BMS software update to the diagnostic logic for DTC P1B77 ? ?High Voltage Battery Pre-charging Fault?. |
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| 19-01-023H | 2019-09-30. Service bulletin. ELECTRICAL SYSTEM:12V/24V/48V BATTERY. This bulletin provides information related to a BMS (Battery Management System) software update to the diagnostic logic for DTC P1B77 ? ?High Voltage Battery Precharging Fault?. |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.