The letters on the Toyota Corolla automatic transmission gear selector mean the following:
P (Park): Locks the transmission into park mode.
R (Reverse): Engages reverse gear.
N (Neutral): Disengages the transmission, allowing the vehicle to roll freely.
D (Drive): Engages normal driving mode in which the transmission automatically shifts between gears.
OD (Over Speed): Enables Over Speed mode, which is designed to improve fuel economy when driving at higher speeds.
L (Low): Engages low gear, which is useful for driving on steep slopes or when towing.
S (Sport Mode): Switches the transmission to Sport mode, which provides higher engine speeds and faster gear changes.
B (Engine Braking): Enables engine braking mode, which uses the engine to slow the vehicle, helping you go downhill or save fuel.