Taking my 2021 ES 350 (12,150 mi. on it, original owner) to dealership Friday for hesitation upon acceleration when going up hill and most pronounced when engine has not yet fully warmed up. Already changed air filter. Maybe helped a little bit, though old one wasn’t really dirty. Changing to “top tier” fuels. Premium made no difference. Sport mode may have helped a little.
Telephone conversation with service manager was unproductive. He had no idea. Simply said to bring it in. I fear it’s an intrinsic annoyance with these cars that I’ll simply have to live with until trade-in time,
