P0B56

Hybrid/EV Battery Voltage Sense F Circuit Low

Severity

🔴 High

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–278 (est.)

Symptoms

Hybrid system power reduction
Increased fuel consumption
Check Engine Light Illuminated
Limitation of operation in electric mode
Error messages on the display

Causes

Faulty battery voltage sensors
Open or short circuit in the measurement circuit
Problems with the Battery Management Module (BMS)
Corroded contacts or damaged wiring
Hybrid battery wear

How to Fix

Check the condition of the voltage sensors
Test the integrity of the measurement circuit
Inspect and clean the connector contacts
Check the operation of the BMS module
Test the condition of the hybrid battery

Related codes

P0B57 P0B55 P0A80