Need to lower the tire pressure of Toyota Tundra ?

that is covered in the FSM.
or alldata.com.
unloaded truck, tire pressure right. etc, then aim and set.
if not in usa, cars have auto-aiming HL, differ. answers. that.

probably yes, check sensors for faults

with the rods in the tool kit stick them into the hole on the rear bumper and turn the handle lowering the winch that lowers the spare tire

This happened to me recently on my 07 Tundra. All you need to do is look on the drivers door jam for the correct tire pressures then put what is recommended in the tires. Makesure you check the pressurse once you have added air to the tires. The light will stay on until you drive the truck I say about 2 to 5 miles then it should be off.

Check that all tire pressures are good. Including the spare tire. If the spare is low, it will also make the light come on.

This is for tire pressure. Tires on the truck must have dropped below 30 PSI. Air them up and check the spare tire pressure and the light should go out. :)

You cannot "disable" the TPWS. Also, when you replace sensors, they need to be programmed to the TPWS computer.

how do you turn the maintenance light off after making oil change?

if this is a toyota 4runner, to reset your tire pressure light, all you need to do is drive your car for up to 10 minutes. On a 4runner the computer takes a reading from your TPMS every minute

*if this is not for a 4runner, there may be a different procedure to reset the sensors, but try this first

The Toyota dealer should have replacement seals if your leak is at the base or replacement sensors if too damaged