P1273 Nissan -

Question

2005 maxima code PO1273 have replaced 0-2 sensors and done relearn code stiil comes back after a few days

Answer 1

try to clean the mass air flow sensor with mass air flow sensor cleaner. you can also check fuel pressure, try using 91 octane gas from shell with a good fuel system cleaner additive 

 

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