U3513

High Voltage System Interlock Circuit B 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 goes into emergency mode
Loss of engine power
Inability to start the vehicle
Error message on the dashboard

Causes

Open circuit in high voltage blocking circuit
Short circuit to ground
Lock sensor malfunction
Wiring harness damage
Connector problems or contact corrosion

How to Fix

Diagnose the high-voltage system using a scanner
Check the integrity of the locking circuit
Inspect connectors and contacts for damage
Check high voltage blocking sensors
Repair only from an authorized dealer

Related codes

U3511 U3512 U3514