P0B1B

Hybrid/EV Battery Pack Voltage Sense C Circuit Low

Severity

🔴 High

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–1667 (est.)

Symptoms

Hybrid system power reduction
Reducing electric range
Check engine light is on
Hybrid system warning
The car goes into emergency mode

Causes

Poor contact in the measuring circuit connectors
Broken or damaged wiring
Voltage measurement module malfunction
Worn or faulty battery cells
Problems with the battery management module

How to Fix

Check the integrity of the wiring and connectors of the measurement circuit
Test the battery voltage measurement module
Check the insulation resistance of the high voltage system
Diagnose and replace faulty battery cells
Repair only from an authorized dealer

Related codes

P0B1A P0B1C P0B1D