# Service bulletin 37451

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: 11021941
- Published by NHTSA: 2025\-08\-18
- Manufacturer's number: 37451
- Manufacturer's date: 2025\-07\-31
- NHTSA component: ELECTRICAL SYSTEM

## NHTSA's summary

This is a Technical Journal: MVBM\-U007700 set together with ECM\-P0A7B68 at PDS. Delete the DTC´s. Do not reload MVBM software. IF the DTC´s comes back together with MIL check engine light, perform the MVBM software

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2025/MC-11021941-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2025/MC-11021941-9999.pdf)

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

## Components

Electrical system

## Trouble codes named

P0A7B, U0077

## Vehicles listed

- 2025 VOLVO S60MHEV
- 2025 to 2026 VOLVO S90MHEV
- 2025 to 2026 VOLVO V60CCMHEV
- 2025 VOLVO V60MHEV
- 2026 VOLVO V60MHEV
- 2025 VOLVO V90CCMHEV
- 2025 to 2026 VOLVO XC40MHEV
- 2025 to 2026 VOLVO XC60MHEV
- 2025 to 2026 VOLVO XC90MHEV

## Other bulletins for the same vehicles and component

- [37373.8.0](/bulletins/11036248.md), 2026-08-18, Service bulletin: ELECTRICAL SYSTEM. This is a Technical Journal: DIM Message and DTC BECM P0C7800. If the DIM displays a message stating "Drive System Service Required" and the DTC listed below is set, follow the advice under "Service". •Do not replace any parts. This is not hardware\-related. •A new BECM software is released in version 3.6.4. or later. Perform a total upgrade according to TJ 31543 and release the car back to customer.
- [37373.7.0](/bulletins/11033745.md), 2026-06-08, Service bulletin: ELECTRICAL SYSTEM. This is a Technical Journal: DIM Message and DTC BECM P0C7800.\&\#13; If the DIM displays a message stating "Drive System Service Required" and the DTC listed below is set, follow the advice under "Service".\&\#13; •Do not replace any parts. This is not hardware\-related.\&\#13; •A new Battery Energy Control Module software is released in software version 5.1.9. Perform a Total Upgrade according to TJ 31543 and release the car back to the customer.\&\#13;
- [37103.6.0](/bulletins/11033739.md), 2026-06-08, Service bulletin: ELECTRICAL SYSTEM. This is a Technical Journal: Check Engine Light/DIM message and ISGM DTC P056200 or in combination with all the DTCs
- [37103.4.0](/bulletins/11031098.md), 2026-04-07, Service bulletin: ELECTRICAL SYSTEM. This is a Technical Journal: Check Engine Light/DIM message and ISGM DTC P056200 or in combination with all the DTCs
- [37376.3.0](/bulletins/11031093.md), 2026-04-07, Service bulletin: ELECTRICAL SYSTEM. This is a Technical Journal: Propulsion Message with DTC BECM P0A9500 and/or P0E2F00. Check the following parameters below. Utilize the High\-voltage system overview to make sure that the contactors are closed while performing this check.
- [37474](/bulletins/11029171.md), 2026-03-02, Service bulletin: ELECTRICAL SYSTEM. This is a Technical Journal: DC Charging Power Limited to 150 kW. Vehicles equipped with the large HBAT27 \(82?kWh\) battery are capable of DC charging at up to 205?kW, provided certain conditions are met—such as a low State of Charge \(\<20% SoC\) and active battery preconditioning \(by selecting a DC charger in Google Maps at least 20 minutes before arrival\).
- [36757](/bulletins/11028384.md), 2026-02-05, Service bulletin: ELECTRICAL SYSTEM. This is a Technical Journal: Text plus TJI 528994 \- Charge Lid Hard to open/close. begin with replacing the actuator in the lock mechanism
- [TJ37103.3.0\-2025\-11\-13](/bulletins/11026741.md), 2025-12-22, Service bulletin: ELECTRICAL SYSTEM. This is a Technical Journal: Check Engine Light/DIM message and ISGM DTC P056200 or in combination with all the DTCs
- [TJ37373.6.0\-2025\-11\-05](/bulletins/11026735.md), 2025-12-22, Service bulletin: ELECTRICAL SYSTEM. This is a Technical Journal: DIM Message and DTC BECM P0C7800. Structure Week 2023w47 and newer: New BECM software is released in version 3.6.4. Perform a Total Upgrade according to TJ 31543. • If the DTC sets after SW version 3.6.4 or newer has been installed, please follow VIDA fault tracing and then create a TIE Support Needed Vehicle Report. \*Structure Week 2023w46 and older: New BECM software is planned for 2026, Q1. • Please follow VIDA fault tracing and then create a TIE Support Needed Vehicle Report
- [37376](/bulletins/11025566.md), 2025-11-17, Service bulletin: ELECTRICAL SYSTEM. This is a Technical Journal: Propulsion Message with DTC BECM P0A9500 and/or P0E2F00. Perform a "High\-voltage system overview" read out. If the BECM "voltage after fuse" values \(front and rear\) are greater than the high voltage battery, the BECM needs to be replaced.

JSON: [/v1/bulletins/11021941](/v1/bulletins/11021941)

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