I have a 2010 FX35 with dtc P0171

[Robert Johnson]

My 2010 fx35 has a code of p0171 running too lean I have replaced the o2 sensors and the cat converters to no avail any ideas are appreciated.

 

[Hoang Le]

Have you check the mass air sensors?

 

[IlovemyFX]

Why did you replace the CAT? Are there any other codes present? Your first step should be to replace the air filter and clean the MAF. There are a number of causes for that code but not usually the CAT.

Here's more info on the code?

P0171 INFINITI Fuel Injection System Too Lean Bank 1