I searched and searched and could not find what this one is. :confused: It came on about ten minutes after doing my 1.8 to 2.5 engine swap. That code (55) isn't even in my manual. The book only goes to 52. Does anyone know this one, or where I can find it? Thanks in advance.

Look in here-
http://www.troublecodes.net/Subaru/
BTW this is linked right here in the "threads of note" up top in this forum.

Thanks for the link. It appears to be the EGR temperature sensor code. It isn't connected because my 2.5 doesn't have the sensor. :confused: I guess I'll have to mount it to the manifold somehow. I can't understand why it didn't do it on my friend's car though. He also didn't have that connector plugged into anything? :confused: Oh, well at least now I know where to start. :)