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U3512: High Voltage System Interlock Circuit B Performance

What Does U3512 Mean?

U3512 is a diagnostic trouble code indicating: High Voltage System Interlock Circuit B Performance. This code relates to the vehicle systems system. The vehicle's computer detected a condition outside normal operating parameters and stored this code.

What To Do Next

  1. 1
    Find your vehicle above

    Click your make and model for real owner reports and common causes specific to your vehicle.

  2. 2
    Check for recalls

    Go to nhtsa.gov/recalls and enter your VIN. Free repairs if covered.

  3. 3
    Get a professional diagnosis

    A code alone doesn't identify the exact failed part. A diagnostic ($50–$150) pinpoints the root cause.

Related Codes

U3507 Control Module Input Power B Circuit Intermittent/Erratic U3508 Control Module Input Power C Circuit Range/Performance U3509 Control Module Input Power C Circuit Low U3510 Control Module Missing Calibration U3511 High Voltage System Interlock Circuit B U3513 High Voltage System Interlock Circuit B Low U3514 High Voltage System Interlock Circuit B High U3515 High Voltage System Interlock Circuit C