I just replaced my O2 sensors about a week ago & my check engine light is still on. I was told that it may be fuses connected with the sensors that may be faulty but I can't find any fuses that go with them am I missing something or am I being told wrong?

 

You have to erase the codes.
Autozone USED to do it, but after lawsuits it no longer offers the service of deleting the code. You may have to go to a dealership or find someone with a OBDII reader.

 

What year is your car? Did you put the correct o2 sensor in? In the newer cars they have a heating unit on them.

Also disconnect your battery for an hour and that should clear the codes.

 

07 & is the heating unit part of the 02 sensor because that was the code that popped up

 

Yes it is built into those o2 sensors. Did you buy a non-heated one? Or maybe the wiring is bad and not the sensor?

 

Bosch 15155 - Oxygen Sensor | O'Reilly Auto Parts

Bosch 15902 - Oxygen Sensor | O'Reilly Auto Parts

These were the sensors that I bought to replace, are these not correct?

 

what i am aware of there are two types of 02 sensors for the front heated type and the non heated type. there should have a list and the description of the two types. when you replaced the first one did you make sure the hole as well as the conection to the sensor was clean? i had to get the code removed from the ecu what i mean i had to take it to the dealer to have them clear it because no matter how many times i cleared it. the check engine o2 sensor error messege came back. the dealer checked the cat they said it is fine but it needed to be told that the sensor was changed

 

The problem might be the fact that they are Bosch.

I know W-Bodies can be picky when it comes to O2 sensors. Bosch is on the list of sometimes doesn't work for us.

 

I went to a mechanic today & he said based on my codes its probably my fuses. I checked all my fuses & they're fine so I'm lost? Also I noticed I burning type smell coming from the upstream o2 sensor area when i cut the engine off. If anybody has any clue what's going on, I need the help.

 

Found out my problem finally, it turns out my ECM CPU needs a software update, $100 from the dealership