I picked-up my 2019 Rav4 Limited end of October, and while my PCS is set to ON, and with High Sensitivity, I have never observed it trying to alert or do anything when approaching another vehicle. The only real way to test is to keep on going and hit the vehicle in front, not very prudent! The only time I ever saw what it might do was when slowly pulling into my driveway and approaching the garage, and just as I was hitting brake to stop when close enough, the Brake slammed on hard. However, when driving and near a vehicle, nothing. There is no way if I continued with gas aplied that I could have stopped. What has your experience been like? I have my first scheduled maintenance appointment in March and will ask them, but your thoughts would be appreciated.