P0AFB

Hybrid/EV Battery System Voltage High

Severity

🔴 High

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$167–889 (est.)

Symptoms

Reduced vehicle power
Warning messages on the dashboard
Disabling the High Voltage System
Inability to charge the battery
Overheating of components

Causes

Charger fault
Problems with balancing battery cells
High voltage battery defects
Battery management system (BMS) malfunction
Problems with high voltage wiring

How to Fix

Battery Management System (BMS) Diagnostics
Checking the voltage of individual battery cells
Charger testing
Checking the integrity of high-voltage wiring
Replacing faulty high voltage system components

Related codes

P0AFA P0AFC P0A80