You can wipe it and ignore it.
It appears to be an old fault from years ago and some sort of minor glitch.

 

Oh really, nothing to worry about then? The code was there a couple of weeks ago when I scanned it, I cleared it then and it's come back. But like I said the cars running fine

 

I believe it might only be there in the shadow memory, just a vague notepad so if it comes again it might give some history on it.