U3511

High Voltage System Interlock Circuit B

Severity

🚨 Critical

Can you drive?

Do not drive — repair immediately

Approx. repair cost

$56–167 (est.)

Symptoms

High Voltage System Failure Warning on Dashboard
Engine power limitation
The car goes into emergency mode
Inability to start the engine (in some cases)
Disabling the High Voltage Battery

Causes

Open or short circuit in the interlock circuit
Damaged high voltage system connectors
High Voltage Lockout Sensor Malfunction
Damage to the insulation of high-voltage cables
Problems with the high voltage system control unit

How to Fix

Check the integrity of the high voltage blocking circuit
Inspect the connectors and contacts of the high-voltage system
Check the condition of the blocking sensors
Carry out diagnostics of the high-voltage system control unit
Repair only from an authorized dealer

Related codes

U3501 U3512 U3510