OBD fault code library

Look up any P or U code to see what it means, what causes it, the parts involved and how it gets fixed.

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U277A /codes/dtcs/u277a
Communication Network System
U277B /codes/dtcs/u277b
Communication Network System
U277C /codes/dtcs/u277c
Communication Network System
U277D /codes/dtcs/u277d
Communication Network System
U277F /codes/dtcs/u277f
Communication Network System
U2781 /codes/dtcs/u2781
Communication Network System
U2782 /codes/dtcs/u2782
Communication Network System
U2783 /codes/dtcs/u2783
Communication Network System
U2784 /codes/dtcs/u2784
Communication Network System
U2785 /codes/dtcs/u2785
Communication Network System
U2786 /codes/dtcs/u2786
Communication Network System
U2787 /codes/dtcs/u2787
Communication Network System
U2789 /codes/dtcs/u2789
Communication Network System
U278A /codes/dtcs/u278a
Communication Network System
U278D /codes/dtcs/u278d
Communication Network System

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