Ordered a tune from Wheatley, which is at my house now.

Two days ago, I swapped intakes and on my test drive, the CEL came on. The following day (when it was daylight out) I re-checked, re-tightened everything with the intake, checked the MAF plugs, etc... Everything looks good.

Drove it for about 10 miles, but the CEL is still on.

Three questions-
To reset it, disconnect the battery?
For how long?

And I really think I should reset it prior to swapping PCM's, right??