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From obd-codes.com:
Here 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.
This is a comprehensive list of all OBDII DTC information and charts which have been posted in the new DTC section. * This list will be updated to include new codes as demand and time permit.*
If you have any questions in regard to the posted information and the diagnostic procedure, create a thread in the appropriate section of the forum and try to be specific with your questions.
Posted OBDII Trouble Code Diagnosis
