Because here http://en.wikipedia.org/wiki/List_of_Honda_engines
it says D15B2 is OBD0
but on the other hand civics are OBD1 since 92

 

Before anyone chimes in with a smart-assed remark realize that he's not in America, so he's not mistaken about the LSi trim level/model Civic.

To answer the question I'm not sure, but I'll try to look it up. There are engines that Honda has made that carry the same block code, but span different OBD generations - best example is the SOHC "ZC" block. There were OBD0 and OBD1 versions of this engine.

 

What color are the distributor plugs? grey or sort of a yellowish clear color? grey=OBD1 yellowish=OBD0. Have you taken the ECU out? OBD0 and OBD1 ECUs have different style plugs. As B18C5-EH2 stated some honda engines span different OBD generations, DOHC ZCs do this as well, there was an OBD)=0 and OBD1 version (among other ZC variants) of the same engine, the OBD1 version is quite rare though.

 

(speaking outside the US)
the D15B2 was both OBD0 and OBD1 flavors. (hints that there was an OBD2 version as well, but can't find anything for sure)

the harness/sensor plugs are the best way to tell which one you have, as 94EG8 said.

 

Thanks

Looks like it is OBD1 though:
just tried that CEL procedure and it worked when i pulled out IAT plug...