P0B8F

Hybrid/EV Battery Voltage Sense Q Circuit Intermittent/Erratic

Severity

🔴 High

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$50–200 (est.)

Symptoms

Unstable battery level indicators
Reduced power or jerky acceleration
Hybrid/EV system warnings appear
Random decrease in maximum speed
Incorrect operation of regenerative braking

Causes

Oxidation or poor contact in sensor connectors
Open or short circuit in the module wiring harness
Malfunction of the voltage sensor of the quarterly module
Measurement Circuit Grounding Problems
Mechanical damage to the wiring in the battery compartment

How to Fix

Check the integrity of wires and connectors in the measurement circuit
Clean the contacts of the voltage sensor connectors
Check the insulation resistance of high-voltage wiring
Test the voltage sensors on the quarterly module
Repair only from an authorized dealer

Related codes

P0B8E P0B90 P0B91