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    OBD-II Diagnostic Trouble Code Database

    Enter OBD-II Diagnostic Trouble Code:

    A DTC is made up of 5 digits. The figure below demonstrates the composition of a OBD-II Diagnostic Trouble Code.

    OBD-II Diagnostic Trouble Codes

    OBD-II Diagnostic Trouble Codes Explained

    OBD-II codes consist of a number of parts. Below is a breakdown of what each digit of the code means:

    First Character - System - The first character identifies identifies the system related to the trouble code.

    P = Powertrain
    B = Body
    C = Chassis
    U = Undefined

    Second Digit - Code Type - The second digit identifies whether the code is a generic code (same on all OBD-II equpped vehicles), or a manufacturer specific code.

    0 = Generic (this is the digit zero -- not the letter "O")
    1 = Enhanced (manufacturer specific)

    Third Digit - Sub-System - The third digit denotes the type of sub-system that pertains to the code

    1 = Emission Management (Fuel or Air)
    2 = Injector Circuit (Fuel or Air)
    3 = Ignition or Misfire
    4 = Emission Control
    5 = Vehicle Speed & Idle Control
    6 = Computer & Output Circuit
    7 = Transmission
    8 = Transmission
    9 = SAE Reserved
    0 = SAE Reserved

    Fourth and Fifth Digits - These digits, along with the others, are variable, and relate to a particular problem.


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