U3512

High Voltage System Interlock Circuit B Performance

Severity

🔴 High

Can you drive?

Do not drive — repair immediately

Approx. repair cost

$56–278 (est.)

Symptoms

Check Engine Light Is On
The car goes into emergency mode
Reduced power or inability to start
Disabling the High Voltage System
Warning message on instrument panel

Causes

Damage to wires or connectors in the interlock circuit
Contact corrosion
Lock sensor malfunction
Problems with the high voltage system control module
Mechanical damage to system components

How to Fix

Visual inspection of high-voltage system wiring and connectors
Checking the integrity of the interlock circuit
Cleaning contacts from corrosion
Replacing damaged circuit components
Diagnostics and flashing of the control module if necessary
Repair only from an authorized dealer

Related codes

U3502 U3511 U3550