P0B43

Hybrid/EV Battery Voltage Sense B Circuit High

Severity

🔴 High

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$28–167 (est.)

Symptoms

Check Engine Light Illuminates
Reduced performance of the hybrid system
The car goes into emergency mode
Reduced motor power
Incorrect battery level display

Causes

Battery voltage sensor B malfunction
Damaged or corroded wiring harness
Problems with high voltage battery connections
Battery management module (BMS) malfunction
Internal fault of the high-voltage battery

How to Fix

Diagnosis of BMS module fault codes
Checking continuity of voltage measurement circuit B
Battery Voltage Sensor Testing
Checking the High Voltage System Connections
Upgrade or replace the battery management module as needed

Related codes

P0B42 P0B44 P0B45