P0CA4

Hybrid/EV Battery Charging Voltage High

Severity

🔴 High

Can you drive?

Do not drive — repair immediately

Approx. repair cost

$167–889 (est.)

Symptoms

Reduced electric range
Engine power limitation
Warning messages on the dashboard
Battery charging problems
The car goes into emergency mode

Causes

Charger fault
Problems with the Battery Management System (BMS)
High voltage circuit malfunction
Damage to battery cells
Software errors in the control system

How to Fix

Diagnostics of the charging system using a scanner
Checking the high voltage circuit for damage
Charger testing
Checking the condition and balance of battery cells
Control system software update

Related codes

P0CA0 P0CA1 P0CA3