🔧 FixIt

U0521: Invalid Data Received From Door Switch F

System
Vehicle Systems

What Does U0521 Mean?

U0521 is a diagnostic trouble code indicating: Invalid Data Received From Door Switch F. 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

U0516 Invalid Data Received From Door Switch A U0517 Invalid Data Received From Door Switch B U0518 Invalid Data Received From Door Switch C U0519 Invalid Data Received From Door Switch D U0522 Invalid Data Received From Door Switch G U0523 Invalid Data Received From Door Window Motor A U0524 Invalid Data Received From Door Window Motor B U0525 Invalid Data Received From Door Window Motor C