P0B31

Hybrid/EV Battery D Voltage Low

Severity

🔴 High

Can you drive?

Do not drive — repair immediately

Approx. repair cost

$167–556 (est.)

Symptoms

Reduced vehicle power
Reducing electric range
Check Engine Light Illuminated
Battery warning on instrument panel
The car may go into emergency mode

Causes

Battery module D fault
Problems with module connections
Battery management system (BMS) malfunction
Problems with the cell balancing system
Excessive battery wear

How to Fix

Diagnosis of battery module D status
Checking module connections and wiring
Testing the Battery Management System
Replacing a faulty battery module if necessary
Repair only from an authorized dealer

Related codes

P0B32 P0B29 P0B30