what are those? like wat do they do? wat are they 4? wat's the difference between the 2? trying to learn thanx 4 any info

 

http://en.wikipedia.org/wiki/On_Board_Device Here buddy.....I didn't read it yet..but i think it explain everything and i'll read it soon

 

koo thanx a lot sir

 

It stands for on board diagnostics system and basically it don't mean ****.

Only reason it becomes an issue is because certain things only work with certain OBD's, EX you can't run OBD-II injectors (w/o alterations) on OBD-I clips, so you need to run OBD-I injectors.

Also, in some areas it has to do with emissions and how they check it. Here in NY, OBD-I cars don't have to be scanned for emissions as OBD-II cars do via OBD-II system & scanner.