Getting code p1135 and p1155 on toyota rav4 2002

Here's what the codes mean:

P1135 Air/Fuel Sensor Heater Circuit Response (Bank 1 Sensor 1)

P1155 Air/Fuel Sensor Heater Circuit. (Bank 1 Sensor 2

This is mainly related to the oxygen sensors. It maybe the sensors themselves or an open wire going to te sensors. They are mainly located on the exhaust pipe. One before and on after the catalytic converter.

Try the bottom two my bottom 2 went as well.

The sensors on top are referred to as air/fuel sensors or "wide band" sensors. The sensors on the bottom (after the cat) are O2 sensors. Bank 1 is the pipe that comes from cylinder #1 and bank 2 is the pipe that incorporates cylinder #2.