Greetings!

Is the 1994 Ranger fully compliant or partially compliant with the OBD II protocol? I've seen various information stating that 1994 might have been a transition year for OBD II and therefore some or all of the data may not be accessible through OBD II. I think model year 1996 was the year that all cars were required to use OBD II, but 1994 and 1995 are a little fuzzy.

Is OBD I the precursor to OBD II? And would a 1994 Ranger use OBD I codes?

Finally, will an OBD II scanner read OBD I codes?

Thanks!

 

'94 is OBD-I, or rather, EEC-IV
'95 was a transition year, you could get either EEC-IV or OBD-II in the Ranger.
'96, OBD-II was required

OBD-I/EEC-IV is the precursor to OBD-II, yes.
A '94 Ranger uses OBD-I/EEC-IV codes.

Most OBD-II scanners will not read EEC-IV codes without some sort of adaptor, and even then only the high end ones. But EEC-IV scanners are cheap and easy to find.

 

Thanks, RP!