OBD-II Code explained

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  1. OBD-II Code explained 
    #1
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    Whilst looking online at various diagnostic equipment came across this on BMW Diagnostic Trouble Codes thought they maybe of use

    OBD-II codes consist of a number of parts. Here is a sample OBD2 code:P0171
    Here is a breakdown of what each digit of the code means:

    First Character - System
    The first character 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 equipped vehicles), or a manufacturer specific
    code.
    • 0 = Generic (this is the digit zero -- not the letter "O")
    • 1 = Enhanced (manufacturer specific)
    • 2 = Generic
    • 3 = Generic

    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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    #2
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    Kevin Whittaker's Car Details
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    Thanks for the useful information
     
     

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