P0B9F

Hybrid/EV Battery Voltage Sense U Circuit

Severity

🔴 High

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–278 (est.)

Symptoms

Check Engine light comes on
Hybrid system power reduction
Incorrect battery level display
The vehicle goes into emergency mode
Reduced performance of the hybrid system

Causes

Open or short circuit in the sensor circuit
Poor contact in the measuring circuit connectors
Section U voltage sensor fault
Problems with the Battery Management Module (BMS)
Contact corrosion in a high voltage system

How to Fix

Check the integrity of the wiring and connectors in the measurement circuit
Check contacts for corrosion or damage
Test the voltage sensor of section U
Check Battery Management Module (BMS) operation
If necessary, replace faulty components

Related codes

P0B9E P0BA0 P0B9D