U3531

High Voltage System Interlock Circuit K

Severity

🔴 High

Can you drive?

Do not drive — repair immediately

Approx. repair cost

$56–278 (est.)

Symptoms

Check Engine light comes on
Reduced power or inability to start
High voltage system error message on display
High voltage battery failure
The car goes into emergency mode

Causes

Open circuit in HVIL circuit
Short circuit in wiring
Damaged high voltage system connectors
Malfunction of one of the high voltage components
Problems with the high voltage system control unit

How to Fix

Check HVIL circuit continuity
Inspect all connectors of the high-voltage system
Check the condition of high voltage components
Scan for additional trouble codes
Repair only from an authorized dealer

Related codes

U3530 U3532 U3520