Slight Rough Idle

[Crixus12]

I just posted another thread but wanted to keep the issues separate.

In my 2014 Expedition EL with the 5.4l, I’ve noticed for a while that there is a slight rough idle (like 1mm fluctuation on the tach but enough to feel it) when warmed up, but only when in P. If I shift to D, solid nothing.
No codes. Just scanned it.

Plugs are new. Coils still original at 105k miles.
Dealer maintained until about 3 years ago until I started to maintain myself following the maintenance schedule.

am I overthinking this and is this ‘rough’ idle little to no concern or should I start chasing a certain path?

Thank you all.

 

[Motorcity muscle]

Sounds normal but could check the mass air flow sensor, easy to clean.

 

[adamsdaddy]

I would suggest cleaning out the throttle body (TB) and the MAF, as recommended by the other poster. One year after buying our 2016 used, I could no longer get it to creep along and it idled slightly rough. Dealer quoted $400 to clean it. I bought two cans of TB cleaner and one can of MAF clearer-problem solved. I used a Harborfreight microfiber cloth to wipe out the TB.