P0BA4

Hybrid/EV Battery Voltage Sense V Circuit

Severity

🔴 High

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$22–167 (est.)

Symptoms

Check Engine light comes on
Hybrid system power reduction
The car goes into emergency mode
Reduced electric range
Incorrect battery level display

Causes

Open or short circuit in the voltage measurement circuit
Faulty battery voltage sensors
Problems with contacts in connectors
Battery management module malfunction
Wiring harness damage

How to Fix

Check the voltage measurement circuit for breaks and short circuits
Test battery voltage sensors
Check and clean all contacts in the circuit
Scan the battery management module for errors
Replace damaged components if necessary

Related codes

P0BA5 P0BA6 P0BAA