P2C43

Battery Isolation/Voltage Stabilization Control Circuit

Severity

🔴 High

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–278 (est.)

Symptoms

Check Engine light comes on
Reduced engine power
The vehicle goes into emergency mode
Problems with charging a high-voltage battery
Warning messages on the dashboard

Causes

Damage to the insulation of high-voltage cables
Insulation monitoring sensor fault
Problems with the high voltage system control module
Short circuit in control circuit
Contact corrosion in a high voltage system

How to Fix

Visual inspection of high-voltage cables for damage
Checking the insulation resistance of a high voltage system
Diagnostics of the insulation monitoring sensor
Checking the integrity of the control circuit
Scan the High Voltage Control Module for errors
Repair only from an authorized dealer

Related codes

P0A80 P0A7F P1E00