My solution may sound dumb, but I had that problem with a new custon tune too. I reset the DTC codes after running for a bit at normal operating temp (above 180), and the code went away and did not return.
The next time I loaded that same tune, after testing a couple others, I got the code again, and again I reset it, and it went away.
Like I said, sounds dumb, but it worked for me.
(This all happened after cleaning MAFs, Seafoaming and 15 other things to try and lick a detonation problem, which is why I did none of that.)