'98 Cavalier Computer

My '98 Chevy Cavalier, 2.2L engine, ~60,000miles had the computer replaced by the local Chevy dealership. Since the replacement I get check engine light with code "1336" reading out on my OBDII Creader. Also, the dome light over the passenger section does not go out now.

The "1336" indicates cam position sensor variance not learned (or something like that).

Is there an initialization of a new computer that needs to be done on installation that might not have been done completely? The replacement was not cheap and the eyes of the Chevy Service Mgr look like $V$ when I come in. Would like to have more info than generally available before I get serviced.

Can you help?

Thanks, Dan B.