U3512
High Voltage System Interlock Circuit B Performance
U3512 is an OBD-II diagnostic trouble code meaning: High Voltage System Interlock Circuit B Performance. Common causes: damage to wires or connectors in the interlock circuit, contact corrosion. Estimated repair cost: $56–278.
Symptoms
- Check Engine Light Is On
- The car goes into emergency mode
- Reduced power or inability to start
- Disabling the High Voltage System
- Warning message on instrument panel
Causes
- Damage to wires or connectors in the interlock circuit
- Contact corrosion
- Lock sensor malfunction
- Problems with the high voltage system control module
- Mechanical damage to system components
How to Fix
- Visual inspection of high-voltage system wiring and connectors
- Checking the integrity of the interlock circuit
- Cleaning contacts from corrosion
- Replacing damaged circuit components
- Diagnostics and flashing of the control module if necessary
- Repair only from an authorized dealer
Related codes
Error U3512 by Vehicle Brand
FAQ
What does the U3512 code mean?
U3512 is an OBD-II diagnostic trouble code that indicates: High Voltage System Interlock Circuit B Performance
What causes a U3512 error code?
The most common causes of U3512 include: Damage to wires or connectors in the interlock circuit; Contact corrosion; Lock sensor malfunction; Problems with the high voltage system control module.
How do I fix a U3512 diagnostic trouble code?
To fix U3512: Visual inspection of high-voltage system wiring and connectors. Checking the integrity of the interlock circuit. Cleaning contacts from corrosion. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U3512?
Do not drive — repair immediately
How much does it cost to fix U3512?
The estimated repair cost for U3512 is $56–278. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat