CEL 19 on a P72 ?????

[93H22ACX]

I have a H22 in a 93 5speed civic cx with a P72 and hondata s200. It has been running fine with no CEL for a few months then all of a sudden i get a CEL 19. CEL 19 is Automatic transmission lockup control valve....P72 ECU are manual transmission so why would i be getting this cel?