P0BB6

Hybrid/EV Battery Voltage Sense Y Circuit High

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
Reducing electric range
Incorrect display of battery charge level
The car goes into emergency mode

Causes

Voltage sensor fault Y
Open or short circuit in the measurement circuit
Wiring Harness Problems
Battery management module (BMS) malfunction
Contact corrosion in a high voltage system

How to Fix

Check the integrity of the voltage measurement circuit Y
Test battery voltage sensors
Inspect and, if necessary, replace the wiring harness
Check the operation of the battery management module
Perform high voltage system diagnostics

Related codes

P0BB5 P0BB7 P0A80