OBD Codes List

Diagnostic reference · U3002

U3002

Vehicle Identification Number

System
Network communication (U code)
Lamp
Check Engine Light
Category
Network Communications

What it means

U3002 means Vehicle Identification Number.

Check these first

  • The VIN not programmed or programmed incorrectly in a module
  • Corrupted VIN data stored in a control module
  • A failed module that stores the VIN
  • Wiring or power loss that interrupted VIN programming

What to do next

  1. Read the stored VIN from each module on a scan tool
  2. Compare the stored VINs against the VIN plate
  3. Inspect the module connector and wiring for the VIN circuit
  4. Reprogram the VIN in the affected module
  5. Replace the module if it will not hold the VIN
  6. Clear the code and retest

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Updated

Generic SAE J2012 definition. Last updated 2026-10-10.