How hard is it to change the o2 sensor on an A4 2.8 I think it was bank 1 2nd sensor something like that. is the a DIY for it?

P0141 O2 Sensor Heater Circ.,Bank1-Sensor2 Malfunction where is this located on the car?


Thanks,

 

Sensor 2 is the post catalytic sensor. It only serves the purpose of telling the ECU that the catalytic converter is working OK. It will not affect mileage, performance or emissions. If you don't have emission inspections in your state, and you don't mind staring at the CEL, and you check your car every month for new codes, you can leave it as is.

The oxygen sensors are often frozen in place and require a lot of liquid wrench and time before they will allow you to get them out.

 

Thanks for the info unfortunately i live in socal and i need the smog test done to reregister so i have to change it. so is bank 1 in the passanger side then?