P0B3B

Hybrid/EV Battery Voltage Sense A Circuit

Severity

🔴 High

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–278 (est.)

Symptoms

Check Engine light comes on
Hybrid system power reduction
Problems with charging a high-voltage battery
Incorrect display of charge level
The car goes into emergency mode

Causes

Open or short circuit in the voltage sensor circuit
Faulty battery voltage sensors
Problems with the Battery Management Module (BMS)
Contact corrosion in a high voltage system
Wiring harness damage

How to Fix

Carry out diagnostics of the high-voltage system
Check the integrity of the voltage measurement circuit
Test voltage sensors
Check Battery Management Module connections
If necessary, replace faulty components
Repair only from an authorized dealer

Related codes

P0B3A P0B3C P0B3D