U3522
High Voltage System Interlock Circuit F Performance
U3522 is an OBD-II diagnostic trouble code meaning: High Voltage System Interlock Circuit F Performance. Common causes: open or short circuit in the interlock circuit, damaged high voltage system connectors. Estimated repair cost: $56–167.
Symptoms
- Check Engine light comes on
- Reduced vehicle power
- The car goes into emergency mode
- Inability to start the high voltage system
- Error message on display
Causes
- Open or short circuit in the interlock circuit
- Damaged high voltage system connectors
- Contact corrosion
- Lock sensor malfunction
- Problems with the high voltage system ECU
How to Fix
- Check the integrity of the locking circuit
- Inspect all connectors of the high-voltage system
- Clean contacts from corrosion
- Check blocking sensors
- Scan the ECU for other errors
- Repair only from an authorized dealer
Related codes
Error U3522 by Vehicle Brand
FAQ
What does the U3522 code mean?
U3522 is an OBD-II diagnostic trouble code that indicates: High Voltage System Interlock Circuit F Performance
What causes a U3522 error code?
The most common causes of U3522 include: Open or short circuit in the interlock circuit; Damaged high voltage system connectors; Contact corrosion; Lock sensor malfunction.
How do I fix a U3522 diagnostic trouble code?
To fix U3522: Check the integrity of the locking circuit. Inspect all connectors of the high-voltage system. Clean contacts from corrosion. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U3522?
Do not drive — repair immediately
How much does it cost to fix U3522?
The estimated repair cost for U3522 is $56–167. Actual cost depends on your vehicle, location, and labor rates.
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