# Service bulletin 19\-01\-023H

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.

- Type: Service bulletin
- NHTSA id: 10165457
- Published by NHTSA: 2019\-09\-30
- Manufacturer's number: 19\-01\-023H
- Manufacturer's date: 2019\-08\-13
- NHTSA component: ELECTRICAL SYSTEM:12V/24V/48V BATTERY

## NHTSA's summary

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 document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2019/MC-10165457-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2019/MC-10165457-9999.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Electrical system, 12\-volt battery

## Trouble codes named

P1B77

## Vehicles listed

- 2019 HYUNDAI IONIQ HYBRID

## Other bulletins for the same vehicles and component

- [20\-EE\-001H\-1](/bulletins/10179247.md), 2020-09-03, Service bulletin: ELECTRICAL SYSTEM:12V/24V/48V BATTERY; ENGINE. The following summarizes the procedure for EV battery replacement:
- [Campaign T3U Dea](/bulletins/10165461.md), 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?.
- [19\-EE\-002H](/bulletins/10160149.md), 2019-05-20, Service bulletin: ELECTRICAL SYSTEM:12V/24V/48V BATTERY. The following summarizes the service procedure for EV battery replacement:
- [19\-EE\-003H](/bulletins/10160148.md), 2019-05-20, Service bulletin: ELECTRICAL SYSTEM:12V/24V/48V BATTERY. The following summarizes the service procedures for Lithium Battery replacement:

JSON: [/v1/bulletins/10165457](/v1/bulletins/10165457)

[Report an error on this page](https://github.com/wenmar-pro/wenmar-open/issues/new?template=data_correction.yml&title=Data%20correction%3A%20Service%20bulletin%2019-01-023H&page=https%3A%2F%2Fopen.wenmarpro.com%2Fbulletins%2F10165457&vehicle=Service%20bulletin%2019-01-023H)