OBD-II Code Decoder

Search the licensed P, B, C, and U reference library by code, definition, system, or manufacturer. Reference-only results are not a complete diagnosis.

  • 12,128 OBD-II codes
  • 18,805 reference definitions
  • 16,185 publicly searchable across 10,181 codes

Review-withheld definitions are excluded; lookup records are not published diagnostic pages.

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Matching definitions: 301 · Unique codes: 300.

Code Meaning System Scope Manufacturer Severity
B3A5B Active Aerodynamic Feature D Position Sensor 2 Circuit Low Voltage Body Generic Not manufacturer-specific Not classified