# P0C78 on the 2022 Volvo XC90

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.

Nobody has written a description of this code yet.

## Bulletins for this model year that name P0C78

- [11036248](https://open.wenmarpro.com/bulletins/11036248), 2026-08-18: 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.
- [11033745](https://open.wenmarpro.com/bulletins/11033745), 2026-06-08: 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;
- [11026735](https://open.wenmarpro.com/bulletins/11026735), 2025-12-22: 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