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U3531: High Voltage System Interlock Circuit K

What Does U3531 Mean?

U3531 is a diagnostic trouble code indicating: High Voltage System Interlock Circuit K. 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

U3526 High Voltage System Interlock Circuit G Performance U3527 High Voltage System Interlock Circuit G Low U3528 High Voltage System Interlock Circuit G High U3529 High Voltage System Interlock Circuit H U3530 High Voltage System Interlock Circuit J High U3532 High Voltage System Interlock Circuit K Performance U3533 High Voltage System Interlock Circuit K Low U3534 High Voltage System Interlock Circuit K High