U352C

High Voltage System Interlock Circuit H High

Severity

🔴 High

Can you drive?

Do not drive — repair immediately

Approx. repair cost

$56–167 (est.)

Symptoms

Check Engine light comes on
The car may go into emergency mode
Reduced power or inability to start
Errors in the operation of the hybrid system

Causes

Open circuit in high voltage blocking circuit
Short circuit in wiring
Lock sensor malfunction
Problems with the high voltage system control module
Contact corrosion

How to Fix

Check the integrity of the locking circuit
Inspect connectors and wiring for damage
Check the lock sensor
Scan the control module for additional errors
Repair only from an authorized dealer

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