P0140 Audi -code says NOX sensor 2 bank 1?

Question

Is this easy to fix yourself

Answer 1

Hi there,

This code is indeed for the bank 1 O2 sensor, sensor 2. This is the O2 sensor AFTER the catalytic converter on bank 1 of the engine. Repairing it isn't that difficult provided the issue is with the sensor itself, you can simply replace it.