U3528
High Voltage System Interlock Circuit G High
U3528 is an OBD-II diagnostic trouble code meaning: High Voltage System Interlock Circuit G High. Common causes: open circuit in high voltage circuit, poor contact in connectors. Estimated repair cost: $56–167.
Symptoms
- Check Engine Light Is On
- The car goes into emergency mode
- Reduced power or inability to start
- High voltage system fault warning
Causes
- Open circuit in high voltage circuit
- Poor contact in connectors
- Interconnect sensor failure
- Wiring damage
How to Fix
- Check the continuity of the high voltage circuit
- Inspect connectors and contacts for corrosion
- Check interconnect sensors
- Scan the system for additional errors
- Repair only from an authorized dealer
Related codes
Error U3528 by Vehicle Brand
FAQ
What does the U3528 code mean?
U3528 is an OBD-II diagnostic trouble code that indicates: High Voltage System Interlock Circuit G High
What causes a U3528 error code?
The most common causes of U3528 include: Open circuit in high voltage circuit; Poor contact in connectors; Interconnect sensor failure; Wiring damage.
How do I fix a U3528 diagnostic trouble code?
To fix U3528: Check the continuity of the high voltage circuit. Inspect connectors and contacts for corrosion. Check interconnect sensors. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U3528?
Do not drive — repair immediately
How much does it cost to fix U3528?
The estimated repair cost for U3528 is $56–167. Actual cost depends on your vehicle, location, and labor rates.
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