U3538

High Voltage System Interlock Circuit L High

Severity

🔴 High

Can you drive?

Do not drive — repair immediately

Approx. repair cost

$56–167 (est.)

Symptoms

Check Engine light comes on
Possible shutdown of the high voltage system
Reduced power or engine failure
Limitation of hybrid system operation
Error message on the dashboard

Causes

Open circuit in the high-voltage system interlock circuit
Wiring harness damage
Lock sensor malfunction
Contact corrosion
Problems in the high voltage system control module

How to Fix

Check the integrity of the locking circuit
Inspect the wiring harness for damage
Check contacts for corrosion
Test the lock sensor
Diagnose the high-voltage system control module
Repair only from an authorized dealer

Related codes

U3537 U3539 U3540