P0B3F

Hybrid/EV Battery Voltage Sense A Circuit Intermittent/Erratic

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$28–167 (est.)

Symptoms

Check Engine light comes on
Hybrid system power reduction
The car goes into emergency mode
Unstable operation of the power plant
Incorrect battery level display

Causes

Poor contact in the voltage sensor connectors
Open or short circuit in the sensor circuit
Malfunction of the voltage sensor itself
Problems with the Battery Management Module (BMS)
Corrosion of contacts in the measurement circuit

How to Fix

Check connections and connectors in the sensor circuit
Test wiring integrity and absence of short circuits
Check the functionality of the voltage sensor
Scan the battery management module for other errors
If necessary, replace the sensor or repair the wiring

Related codes

P0B3E P0B40 P0AFA