P0B2A

Hybrid/EV Battery B Voltage High

Severity

🔴 High

Can you drive?

Do not drive — repair immediately

Approx. repair cost

$167–889 (est.)

Symptoms

Check Engine light comes on
Reduced power or transition to emergency mode
Warning messages on the dashboard
Problems with charging a high-voltage battery
Disabling the hybrid system

Causes

Battery management module (BMS) malfunction
Problems with balancing battery cells
Charging system malfunction
Internal short circuit in battery
Damage to high voltage cables or connectors

How to Fix

High Voltage Battery System Diagnostics
Checking and flashing the BMS module
Balancing Battery Cells
Checking the charging system and components
Replace faulty battery modules if necessary

Related codes

P0B29 P0B2B P0B2C