P1273 Nissan -

Question

2005 Nissan Frontier V6 2WD.....had code P0420.....have replaced cats and pre cats, all 4 sensors came up code P1273 .... did the re lean.....cleared codes.....code P12736 still keeps coming up....any suggestions????

Answer 1

you can try to disconnect the battery over night just to be safe on the clearing the self-learning.

https://www.autocodes.com/uploads/nissan/NTB04-126.pdf

 

Other possible causes:

- Fuel pressure
- Faulty Fuel injector 
- Intake air leaks
- Faulty Air Flow Meter 

I would try to clean the mass air flow sensor with mass air flow sensor cleaner first than check for intake leaks (broken, cracked or loose hoses)

Check the fuel pressure its suppose to be 51psi at idle.