OBD II Codes
I know there was some discussion in the past about code readers and such, but this is interesting info no matter how you get your codes out of the system:
http://www.edgeproducts.com/product_...cle-pdf-41.pdf
First digit structure is as follows:
Pxxxx for powertrain
Bxxxx for body
Cxxxx for chassis
Uxxxx for future systems
Second digit structure is:
P0xxx Government required codes
P1xxx Manufacturer codes for additional emission system function; not required but reported to the government
Third digit structure is:
Px1xx measurement of air and fuel
Px2xx measurement of air and fuel
Px3xx ignition system
Px4xx additional emission control
Px5xx speed and idle regulation
Px6xx computer and output signals
Px7xx transmission
Px8xx transmission
Px9xx control modules, input and output signals
The fourth and fifth digits designate the individual components and systems.
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