Question

2008 Chevrolet Avalanche 5.3l Heated Oxygen Sensor (H2OS) Bank 1 Sensor 2 circuit fuse, how do I fix it?

Answer 1

What exactly is your question? Since you have both codes, you probably need a new O2 sensor Bank 1 Sensor 2
 

P0036 CHEVROLET - HO2S Heater Control Circuit Bank 1 Sensor 2

Read more: https://www.autocodes.com/p0036_chevrolet.html

P0141 CHEVROLET - O2 Sensor Heater Circuit Malfunction Bank 1 Sensor 2

Read more: https://www.autocodes.com/p0141_chevrolet.html