P1B77 on the 2017 Kia Niro
The bulletins listed name this code in NHTSA's summary, or are about the same components. A bulletin or a recall listed here may apply to the model year. None of it is a diagnosis.
This code is specific to a manufacturer and is not described here. Its meaning is in the manufacturer's service information.
| PS553-R1 | 2018-06-18. Service bulletin. PITSTOP - HEV WARNING LIGHT AND DTC P1B25/P1B77 - This bulletin has been revised to include additional information. When addressing a concern related to the Niro HV warning light ON, and KDS detects a primary DTC P1B25 (HV Path Fault) and secondary DTC P1B77 (HV Pre-Charge Fault), then the 125 Amp High Voltage Battery Fuse should be inspected for an intermittent and/or an open condition.. |
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| PS553 | 2018-05-14. Service bulletin. PITSTOP - HEV WARNING LIGHT AND DTC P1B25/P1B77 - When addressing a concern related to the Niro HV warning light ON, and KDS detects a primary DTC P1B25 (HV Path Fault) and secondary DTC P1B77 (HV Pre-Charge Fault), then the 125 Amp High Voltage Battery Fuse should be inspected for an intermittent and/or an open condition. |
| PS491 | 2017-08-02. Service bulletin. PITSTOP: Voltage Protection Device (VPD) DTCs P1BA7 and P1B77 - The Voltage Protection Device (VPD) (1) is mounted on top of the HV battery pack. If the HV battery overcharges, the battery cells/modules/case can swell. If swelling occurs, the VPD switch will turn ON, and the Battery Management System (BMS) will receive the VPD ?ON? signal and turn off the Power Relay Assembly (PRA) to prevent damage. |
3 on file from NHTSA, as of 2026-10-19. See them in the bulletin list. A bulletin lists model years: read the document for which vehicles it concerns.