OBD2 Code Categories

Browse 7,231+ diagnostic trouble codes organized by system category.

Powertrain Codes

P-codes · 4,384 codes

Engine, transmission, and emissions system codes (P-codes)

Body Codes

B-codes · 1,359 codes

Airbag, lighting, HVAC, and interior system codes (B-codes)

Chassis Codes

C-codes · 635 codes

ABS, traction control, and suspension system codes (C-codes)

Network Codes

U-codes · 853 codes

CAN bus, module communication, and network codes (U-codes)

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