P0B20

Hybrid/EV Battery Pack Voltage Sense D Circuit Low

Severity

🔴 High

Can you drive?

Do not drive — repair immediately

Approx. repair cost

$56–333 (est.)

Symptoms

Reduced performance of the hybrid system
Dashboard warning
Battery charging problems
The car may go into emergency mode
Reducing electric range

Causes

Damage to wiring or connectors
Voltage control module malfunction
Problems with the hybrid battery itself
Malfunction of the main hybrid system controller
Contact corrosion

How to Fix

Check the integrity of the wiring and connectors
Check voltage at all measuring points
Test the voltage control module
Check the condition of the hybrid battery
If necessary, replace faulty components

Related codes

P0B21 P0B22 P0A80