P0105 and P1519 but NOT the K40!

Getting these two codes. K40 was replaced by dealer 4 years ago. I opened the K40 and the solder joints are all perfect. So maybe I really have a problem?
I popped off the front engine cover and there was some filth around everything there, I cleaned things off and cleaned the connectors on the cam sensor (the big round thing).
Code has not come back but have not driven it much, so nothing proven yet. What is the next thing to try if cleaning the connector doesn't help?
Car has 272K miles and is running fine. Have had to replace both ignition coils in the last year, other than that easy going.