P0BB9

Hybrid/EV Battery Voltage Sense Z Circuit Range/Performance

Severity

🔴 High

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–167 (est.)

Symptoms

Check Engine light comes on
Reduced vehicle power
Switching to emergency mode
Incorrect battery level display
Increased fuel consumption (for hybrids)

Causes

Battery voltage sensor fault
Open or short circuit in the measurement circuit
Poor contact in connectors
Battery management module (BMS) malfunction
Wiring Harness Problems

How to Fix

Check the condition of the voltage sensors
Check the integrity of wiring and connectors
Scan the battery management module for errors
Replace faulty circuit components
Repair only from an authorized dealer

Related codes

P0BB8 P0BBA P0AFA