U3515
High Voltage System Interlock Circuit C
U3515 is an OBD-II diagnostic trouble code meaning: High Voltage System Interlock Circuit C. Common causes: interlock circuit break, poor contact in connectors. Estimated repair cost: $56–222.
Symptoms
- Check Engine light comes on
- High voltage system error message on instrument panel
- Engine power limitation
- Inability to start the car
- The car goes into emergency mode
Causes
- Interlock circuit break
- Poor contact in connectors
- Lock sensor malfunction
- Wiring harness damage
- Problems with the high voltage system control module
How to Fix
- Check the integrity of the locking circuit
- Inspect and clean all contacts in the circuit
- Check the locking sensors for functionality
- Check the condition of the wiring harness
- Diagnostics of the high-voltage system control module
- Repair only from an authorized dealer
Related codes
Error U3515 by Vehicle Brand
FAQ
What does the U3515 code mean?
U3515 is an OBD-II diagnostic trouble code that indicates: High Voltage System Interlock Circuit C
What causes a U3515 error code?
The most common causes of U3515 include: Interlock circuit break; Poor contact in connectors; Lock sensor malfunction; Wiring harness damage.
How do I fix a U3515 diagnostic trouble code?
To fix U3515: Check the integrity of the locking circuit. Inspect and clean all contacts in the circuit. Check the locking sensors for functionality. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U3515?
Do not drive — repair immediately
How much does it cost to fix U3515?
The estimated repair cost for U3515 is $56–222. Actual cost depends on your vehicle, location, and labor rates.
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