P0ECF

Hybrid/EV Battery E Voltage High

Severity

🔴 High

Can you drive?

Do not drive — repair immediately

Approx. repair cost

$167–889 (est.)

Symptoms

Check Engine light comes on
The car goes into emergency mode
Reduced engine power
Error message on display
Disabling the High Voltage System

Causes

Malfunction of high-voltage battery elements
Problem with balancing battery cells
Battery cooling system malfunction
Charger problems
Errors in the control unit software

How to Fix

High voltage battery diagnostics
Checking the battery cooling system
Control unit software update
Replacing faulty battery cells
Checking the charger operation

Related codes

P0ED0 P0ED1 P0AFA