# Service bulletin TTT073823

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: 10244117
- Published by NHTSA: 2023\-10\-16
- Manufacturer's number: TTT073823
- Manufacturer's date: 2023\-08\-21
- NHTSA component: ELECTRICAL SYSTEM:12V/24V/48V BATTERY

## NHTSA's summary

TT: MIL On with DTCs P1F6C71 and/or P1F6E71

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2023/MC-10244117-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2023/MC-10244117-9999.pdf)

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

## Components

Electrical system, 12\-volt battery

## Trouble codes named

P1F6C, P1F6E

## Vehicles listed

- 2021 to 2022 TOYOTA MIRAI

## Other bulletins for the same vehicles and component

- [TSB001522](/bulletins/10214315.md), 2022-06-21, Service bulletin: ELECTRICAL SYSTEM:12V/24V/48V BATTERY; EQUIPMENT. TSB: A battery in a stored vehicle is subject to conditions that can reduce its performance and service life. These conditions include storage period, temperature, parasitic drain, and battery load. Because of these factors, battery inspection and maintenance are required in order to ensure proper operation and optimal battery life. As a matter of policy, Toyota does not provide battery warranty coverage for discharged and/or failed batteries due to lack of maintenance. It is the dealer?s responsibility to maintain the specified State\-Of\-Charge \(SOC\) of the vehicle?s battery while in stock and ensure proper SOC at delivery. To eliminate customer service concerns due to an undercharged battery during the first few weeks of ownership, ALL dealers should test the auxiliary \(12V\) battery and recharge, if necessary, no more than 48 hours before delivery to the customer.
- [T\-SB\-0040\-20 Rev](/bulletins/10177586.md), 2020-07-27, Service bulletin: ELECTRICAL SYSTEM:12V/24V/48V BATTERY. TSB: Hybrid vehicles are equipped with two types of batteries: ?Hybrid Vehicle \(HV\) battery ?Auxiliary \(12V\) battery If the hybrid vehicle is put into storage, the State\-Of\-Charge \(SOC\) of its HV battery and auxiliary battery will gradually decrease. To prevent the auxiliary battery from becoming discharged during storage, proper maintenance is necessary.

JSON: [/v1/bulletins/10244117](/v1/bulletins/10244117)

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