changed plugs 2005 nissan altima 2.5now have code P1273

Question

I changed the spark plugs - I now have a code of P1273 ( lean air flow mixture ?) what are my options for fix ---before the change I use to every so often get a P0420 -after changing plugs I now no longer get the p0420 code but now get the P1273 again it has never come up before changing the plugs and has never come up before
car still runs fine not rough , and no loss of power
what are my options for a fix

Answer 1

disconnect the battery for an 1 hour to reset the ECU. its much easier than going through the steps to reset it

http://nissanhelp.com/diy/altima/projects/nissan_altima_clear_self_learning.php

https://www.autocodes.com/p1273_nissan.html

 

if that does not help

Possible causes

- Faulty Air fuel ratio (A/F) sensor 1 Bank 1 

- Faulty Air fuel ratio (A/F) sensor 1 heater Bank 1 

- Fuel pressure

- Faulty Fuel injector 

- Intake air leaks

- Faulty Air Flow Meter