Question

I replace the upstream o2 sensor on my 2004 Nissan Sentra now I got trouble code p1273, what I need to do?

Answer 1

If there are no exhaust or intake leaks, you have have to clear the self-learning control. The factory suggest clearing the self learning control after the sensor is replaced.

Here are the instructions to clear the self-learning: http://nissanhelp.com/diy/sentra/projects/nissan_sentra_clear_self_learning.php