should a ECM be performed on my 2004 Maxima after replacing 02 sensors P1273?

Question

Replace Bank 1 sensor 1 for P1273 code on 2004 Nissan Maxima

Answer 1

Hi there,

The ecm doesn't need to be reflashed, but the fuel trims need to be reset and the codes cleared. This should resolve the issue. If the code continues to come back then there is a wiring problem and it's not the sensor itself.