P1273 2005 Nissan Altima Sedan -

Question

I am getting the p1273 code on my 2005 nisssn altima. I just took off the pre-cat and installed headers so I can avoid the p0420 problem. But now this p1273 code won't go away. I change both O2 sensors and the MAF. I also performed the relearn procedure.
Can anyone tell me what is causing this code to keep coming back?
Thanks

Answer 1

HI there,

This code continues to come back when you don't clear the fuel trims. This is not just clearing the check engine light, but actually cleaning out the old info from the computer. This requires disconnecting the battery for at least 24 hours or a scan tool that can clear the fuel trim.