P0B41

Hybrid/EV Battery Voltage Sense B Circuit Range/Performance

Severity

🔴 High

Can you drive?

Do not drive — repair immediately

Approx. repair cost

$56–278 (est.)

Symptoms

Check Engine light comes on
Hybrid system power reduction
The car goes into emergency mode
Reducing electric range
Incorrect battery level readings

Causes

Voltage sensor B fault
Damage or corrosion of wiring in the measurement circuit
Poor contact in the measuring circuit connectors
Problems with the Battery Management Module (BMS)
Malfunction of the highest voltage battery

How to Fix

Check continuity of voltage measurement circuit B
Inspect and clean sensor contacts and connectors
Test voltage sensors
Check Battery Management Module (BMS) operation
Diagnose the condition of a high-voltage battery

Related codes

P0B40 P0B42 P0B43