Miscellaneous Documentation

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[s2If is_user_logged_in()]OBD to RS232 Interpreter.pdf [/s2If] [s2If !is_user_logged_in()]OBD to RS232 Interpreter.pdf[/s2If]


FAQ: OBD2 Codes Explained
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 [s2If is_user_logged_in()]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)

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. For example, a P0171 code means P0171 - System Too Lean. [/s2If] [s2If !is_user_logged_in()] ...to continue reading please Login or Register[/s2If]