This switch, adjacent to the automatic shift lever, allows the driver to choose the gear range as appropriate.
There are three positions, POWER, AUTO and HOLD.
POWER: when switched on, the POWER light will show on the dash. In normal driving, with the shift lever in D, the power mode will operate through the full range of gears 1 to 3 plus overdrive when active. In 2, the power mode will only operate through 1 to 2, and in L, the power mode will only operate on the first gear.
AUTO: In auto mode, the transmission will automatically change between POWER and ECONOMY modes as driving conditions define, changing to POWER mode for example when starting a hill ascent.
HOLD: The HOLD light will show on the dash. The transmission will operate in ECONOMY mode through the full range of selected gears, not changing any higher than the selected gear, for example if you have selected L, the transmission will not change up to 2 or higher.