P0B81

Hybrid/EV Battery Voltage Sense O Circuit

Severity

🔴 High

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$33–167 (est.)

Symptoms

Check Engine light comes on
The car goes into emergency mode
Reduced engine power
Unusual battery level readings
Problems charging the hybrid battery

Causes

Open or short circuit in the sensor circuit
Battery voltage sensor fault
Poor contact in connectors
Wiring harness damage
Problems with the battery management module

How to Fix

Check the continuity of the voltage sensor circuit
Inspect connectors and connections for corrosion
Check the functionality of the voltage sensor
Scan the battery management module for additional errors
If necessary, replace the battery voltage sensor

Related codes

P0B80 P0B82 P0B83