P0B9B

Hybrid/EV Battery Voltage Sense T Circuit Range/Performance

Severity

🔴 High

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$33–167 (est.)

Symptoms

Check Engine light comes on
Hybrid system power reduction
Battery charging problems
Unstable operation of the hybrid system
Increased fuel consumption (for hybrids)

Causes

Battery voltage sensor fault
Open or short circuit in the sensor circuit
Poor contact in circuit connectors
Problems with the battery management module
Corroded contacts or damaged wiring

How to Fix

Check the continuity of the voltage sensor circuit
Inspect connectors and contacts for damage
Check the functionality of the voltage sensor
Scan the battery management module for errors
If necessary, replace the sensor or repair the wiring

Related codes

P0B9A P0B9C P0B9D