U352B

High Voltage System Interlock Circuit H Low

Severity

🔴 High

Can you drive?

Do not drive — repair immediately

Approx. repair cost

$56–167 (est.)

Symptoms

Check Engine light comes on
The car does not go into ready-to-drive mode
Reduced power or inability to start
High voltage system error message on dashboard

Causes

Open or short circuit in the interlock circuit
High Voltage Lockout Sensor Malfunction
Damage to the high voltage system wiring harness
Connector problems or contact corrosion
Malfunction of the high-voltage system control module

How to Fix

Check the integrity of the high voltage blocking circuit
Inspect connectors and contacts for damage and corrosion
Check high voltage lockout sensor
Scan the high voltage system control module for errors
Repair only from an authorized dealer

Related codes

U352A U352C U352D