Original keyless stops working randomly. Battery is good.
 

Hello everyone. My 2001 Ultra's keyless remote seems to stop working randomly. I have three original keys, all of them do the same thing. Sometimes keyless works fine but most times it just doesn't do anything. When I press any key on the remote the red indicator on the fob lights up but the car does not respond. All buttons inside the car work just fine, locking/unlocking, physical key unlocks and starts the car ok as well.
Battery in the remotes are fresh, battery is one year old.
Any help is appreciated.

my guess is 2 keys and 1 valet key. valet keys do not work anything but door and ignition. no trunk or glove box .

Three original keys with remotes and a valet key in the plastic mold without any buttons.

I'd change the batteries again before I'd do anything else. Easy, low cost, and might fix the problem. Worth a try in my opinion.

If battery change in key fob doesn't solve it, check the main 12-volt battery connections for any corrosion as well.

I have found my keyless entry has problems in areas with public wi-fi. When I leave that local area, everything works fine again.

There's a Technical Bulletin about that...