Code 1135 came up. How much should I expect to pay for repairs?

Question

The car is a 2001 Toyota Sienna LE

Answer 1

P1135 Bank 1 Sensor 1 A/F sensor heater circuit

Even though this is for  a A/F sensor is commonly referred to as the 02 sensor , The fix here is replace the 02 sensor , it the heater element that degrades over time and use, the price depends on Brand that you decide to use