I'm having a... discussion... with my stepfather. His KIA dealer has
told him that he is "not authorized" to know the ODBC codes, or some
such thing. That it is "illegal" for different vehicle manufacturers to
share codes. There's more, but that's the gist of it
Never heard of such a thing. I sort of thought the codes were standard...
Can someone provide a bit of detail on this? Preferably someone who
actually works in a dealership (KIA preferred)?
Incidentally, will the on-off-on... sequence to view codes work on a Kia
Thanks for the help!
Suddenly, without warning, jmc exclaimed (5/22/2006 10:30 AM):
Also, he's also insisting that there are more than just the codes we can
look up ourselves, that there are codes that are "private" to each
manufacturer, making it hard for independent shops, 'cause they "can't
get those codes".
There are, by some reports, 15,000 different codes.
The first 1000 "P" (as in P0234) codes are generic across all
After that, it's very manuafacturer specific, the same codes on two
different manufacturers cars can mean different things.
As well there are also "U", "C", and "B" codes.
If you want to see a list off all (well maybe not ALL) codes, go here;
My personnal experiance indicates that all required codes for a give
vehicle are in the manufacturers Service Manual.
The last time I had my car serviced (failed O2 sensor) the invoice actually
listed the code number, and description. I don't think it's a big secret.
Scan Tools can be had for as little as $39.95 (Harbour frieght) or for many
1000's of dollars. Not all tools will display all codes, you get what you
Oh and by the way, there are also several thousand commands that can be
sent to your OBDII computer, that will force the computer to do all sorts
of things, those are very rare to find anywhere, including the service
Do a google search on OBDII scan codes, for more information.
The SAE OBD2 codes are public domain and REQUIRED BY LAW to be
standardized. The extended OBD2 codes are proprietary and MAY be made
public by the manufacturers. There is NO LAW against it.
To the best of my knowledge there is no way to read OBD2 codes by an
on-off sequence, but I've been wrong before.
The SAE codes cover all the bases for engine and powertrain basic
operation and emissions. The extended codes cover things like
automatic transmission diagnostics, cruise control, traction control,
antilock brakes, and canbus control of accessories etc.
Motorsforum.com is a website by car enthusiasts for car enthusiasts. It is not affiliated with any of the car or spare part manufacturers or car dealers discussed here.
All logos and trade names are the property of their respective owners.