U3541

High Voltage System Interlock Circuit O

Severity

🔴 High

Can you drive?

Do not drive — repair immediately

Approx. repair cost

$17–89 (est.)

Symptoms

Check engine light comes on
Reduced vehicle power
Hybrid system does not activate
High voltage system fault warning
The car goes into emergency mode

Causes

Broken or damaged interlock circuit wiring
Malfunction of high voltage system safety sensors
Lockout relay problems
Short circuit in the circuit
High voltage control module software error

How to Fix

Conduct diagnostics of the high-voltage system using special equipment
Check the integrity of wires and connectors in the locking circuit
Test high voltage blocking sensors
Check the serviceability of the blocking relay
Repair only from an authorized dealer

Related codes

U3540 U3542 U3550