P0BB5

Hybrid/EV Battery Voltage Sense Y Circuit Low

Severity

🔴 High

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–278 (est.)

Symptoms

Reduced vehicle power
Increased fuel consumption (for hybrids)
Check Engine Light Illuminates
Reduced range (for EV)
Incorrect battery level readings

Causes

Voltage sensor fault Y
Open or short circuit in the measurement circuit
Poor contact in circuit connectors
Problems with battery modules
Battery control unit malfunction

How to Fix

Check the integrity of the voltage measurement circuit Y
Check connections and connectors in the circuit
Test voltage sensor Y
Check the condition of the battery modules
If necessary, replace faulty components

Related codes

P0BB4 P0BB6 P0AFA