U353B

High Voltage System Interlock Circuit M Low

Severity

🔴 High

Can you drive?

Do not drive — repair immediately

Approx. repair cost

$56–278 (est.)

Symptoms

Hybrid/electric system does not activate
The warning light on the dashboard comes on
The car goes into emergency mode
Decreased power or inability to move
Error message on display

Causes

Broken or damaged interlock circuit wiring
High Voltage Lockout Sensor Malfunction
Short circuit to ground
Problems with the HV system control module
Corrosion or poor contact in connectors

How to Fix

Check the integrity of the interlock circuit wiring
Check the resistance and voltage of the lock sensor
Inspect connectors and contacts for corrosion
Check the functionality of the HV system control module
Repair only from an authorized dealer

Related codes

U353A U353C U353D