O2 sensor heater help

[That1guy12345]

Hey guys. My 97 explorer with the 4.0sohc is throwing 4 codes. They are for all 4 oxygen sensors are having problems with the heating thing in them. I would really like it fixed, but really dont want to change all four due to cost. Could all four go out like that or is there something that controls all of them that could be bad?

 

[robertoa1a]

Im thinking that it would be real unusual for all to go out at once. Check fuse #11

 

[That1guy12345]

Im thinking that it would be real unusual for all to go out at once. Check fuse #11

Where at under the hood, inside?

Thanks for the help

 

[robertoa1a]

I'm not sure. I'M reading a schematic. Check both. It just says fuse 11

 

[That1guy12345]

Anyone else have any ideas if the fuse is good?

The truck did have a really bad exhaust leak by the muffler for a few months. So it didnt have an backpressure. Could that hurt it? The check engine light has been on since the car was bought and I think the sensors were already an issue.