I've been having trouble getting our Liftmaster 3850P-267 to learn the Homelink that Tesla just installed in my 2022 TM3. The Liftmaster's receiver is known-good, having no range issues and a recent history of programming two 373LMs, Homelink in a 2007 Prius, and a wired remote keypad. Been mainly trying in D-Mode, since the 3850's 315 MHz Security+ expects a rolling-code remote, and the Tesla's other setup method (the default) appears to be set up to learn from a remote rather than have the receiver learn from it (not great security – being able to learn from a remote – and didn't work anyway). Tried pressing transmit multiple times, removing bulbs from the 3850, repositioning the car, etc., but the 3850 never learns the Tesla. I went so far as to clear all remotes from the 3850 and added them back successfully, but it still would not learn the Tesla's Homelink.
Homelink's web site instructions don't inspire much confidence either, inasmuch as they don't seem to describe the TM3's actual UI: https://homelink.com/program/instructions/us/5/1/1/2570/317/49/0/0/9/0/11/other/0/1/us
Homelink's web site instructions don't inspire much confidence either, inasmuch as they don't seem to describe the TM3's actual UI: https://homelink.com/program/instructions/us/5/1/1/2570/317/49/0/0/9/0/11/other/0/1/us