Just open up your air filter housing and you will see a small protrusion with two tiny wires on the top inside of the housing. I would suggest you get carb cleaner and then a small cotton swab and make sure those wires are bright and shinny. This may very well solve your problem and save you a great deal of money for a new sensor which is very expensive.
The termostat housing
The 2001 Toyota Corolla has 16 valves.
The 2001 Toyota Corolla has a 5-speed manual.
The 2001 Toyota Corolla has an inline 4 engine.
The 2001 Toyota Corolla is a gas-powered vehicle.
The 2001 Toyota Corolla has double overhead cam (DOHC).
The 2001 Toyota Corolla runs on regular unleaded.
The 2001 Toyota Corolla is 14 ft. 6 in. (174 in.) long.
The 2001 Toyota Corolla's turning circle is 32.2 ft..
The 2001 Toyota Corolla has a drag coefficient of .31 Cd.
The height of the 2001 Toyota Corolla is 4 ft. 6.5 in. (54.5 in.).
wher is the door relay of toyota corolla 2001