U3519
High Voltage System Interlock Circuit D
U3519 is an OBD-II diagnostic trouble code meaning: High Voltage System Interlock Circuit D. Common causes: open circuit in hvil circuit, damaged high voltage system connectors. Estimated repair cost: $56–167.
Symptoms
- Check Engine light comes on
- Vehicle power limitation
- Inability to start the high voltage system
- Error message on the dashboard
- The car goes into emergency mode
Causes
- Open circuit in HVIL circuit
- Damaged high voltage system connectors
- Corrosion of contacts in the interlock circuit
- Malfunction of the high-voltage system control module
- Mechanical damage to wiring
How to Fix
- Visual inspection of high voltage connectors and wiring
- Checking HVIL circuit continuity with a multimeter
- Finding and eliminating breaks in wiring
- Cleaning contacts from corrosion
- Diagnostics of the high-voltage system control module
- Repair only from an authorized dealer
Related codes
Error U3519 by Vehicle Brand
FAQ
What does the U3519 code mean?
U3519 is an OBD-II diagnostic trouble code that indicates: High Voltage System Interlock Circuit D
What causes a U3519 error code?
The most common causes of U3519 include: Open circuit in HVIL circuit; Damaged high voltage system connectors; Corrosion of contacts in the interlock circuit; Malfunction of the high-voltage system control module.
How do I fix a U3519 diagnostic trouble code?
To fix U3519: Visual inspection of high voltage connectors and wiring. Checking HVIL circuit continuity with a multimeter. Finding and eliminating breaks in wiring. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U3519?
Do not drive — repair immediately
How much does it cost to fix U3519?
The estimated repair cost for U3519 is $56–167. Actual cost depends on your vehicle, location, and labor rates.
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