Certain 2023 Volvo automobiles could experience a diagnostic error in the Brake Control Module 2 (BCM2) that could cause a loss of the Anti-lock Brake System (ABS), Electronic Stability Control (ESC), and traction control.

The vehicles affected include:

Volvo first became aware of this condition in October 2022 when they received the first report of issues with the brake pedal in a 2023 Volvo vehicle. As reports increased, an investigation was opened to find a possible common root cause. In December the investigation was escalated to the Critical Concern Action Process (CCAP) and the Critical Concern Management Team (CCMT) initiated a technical investigation to evaluate the risk assessment and root cause. In January the technical investigation was completed and a recall was initiated.

According to the defect report, certain diagnostic tests that check the grounding of the BCM2 could put it in a faulty state that could result in a loss of brake support functions. The problem is caused by a lack of robustness in software compatibility with a specific BCM2 HW version.

The customer may experience a hard/stiff brake pedal and potential loss of brake support functions such as:

• Brake-by-wire.
• ABS, ESC, and traction control.
• ACC (Adaptive Cruise Control), Pilot assist and OPD (One pedal drive)
• All active safety and city safety functions described in the user manual that involve braking.

The driver display will warn the customer with DIM messages and malfunction indication lamps if this issue occurs. This is an intermittent issue, and the faulty state will remain through the drive cycle until the vehicle enters deep sleep.

Volvo will release an over-the-air (OTA) BCM2 software update to correct the problem. Volvo Car’s number for this recall is R10217 and the NHTSA campaign number is 23V-012.