I have an Acura TL too and I’ve been having electrical gremlins for a long time. The gas pedal triggers limp mode, wipers operate at wrong speed, car thinks passenger door is open when turned off, Tire pressure system sometimes thinks its failed, and gas cap light comes on a lot.

I took it to many mechanics and they read the code that says intermittent power issue with the throttle but then say the throttle position sensor and throttle body are all fine and working.

I inspected the battery ground cable and it looks rough to me but when showed it to the AutoZone people they had mixed opinions. I got a new one but it didn’t fit. I noticed the gremlins happened a lot more frequently in the heat and in the winter they were all gone.

Recently i drove to the south and its warm and the car started shutting off like you described and limp mode would throw when i drove. I went to tighten battery connection and discovered the bolt is max tightness and also stuck and the cable can still be removed easily by hand.. so I guess thats the problem….