P0BB8

Hybrid/EV Battery Voltage Sense Z Circuit

Severity

🔴 High

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–278 (est.)

Symptoms

Check Engine light comes on
Reduced vehicle power
Switching to emergency mode
Incorrect battery level display
Extended charging time (for PHEV)

Causes

Open or short circuit in the measurement circuit
Battery voltage sensor fault
Problems with the connector or wiring harness
BMS (Battery Management System) module malfunction
Contact corrosion in a high voltage system

How to Fix

Check the integrity of the voltage measurement circuit
Inspect connectors and wiring harness for damage
Check voltage sensor readings using a scanner
Test or replace voltage sensors
Diagnose and, if necessary, replace the BMS module

Related codes

P0BB7 P0BB9 P0AFA