Question

I have a 2010 Nissan Versa with the code P1421, is there a bulletin service for this car? Reprogram the computer? Thank you

Answer 1

There is no service bulletin for the 2010 model.

you can try to clean the mass airflow sensor with mass airflow sensor cleaner and clean the throttle body with throttle body cleaner and after you will have to do idle air relearn

see steps below (you can disconnect the battery while cleaning the parts to reset the computer 15-30min)

2007-2011 Nissan Versa Idle Air Volume Learning Procedure
Read more: https://www.nissanhelp.com/diy/versa/projects/nissan_versa_idle_air_volume_learning.php