code p0171 will not go away after recommended fix
 

Hello All,
I have a 2001 4.4 and I just did the crancase vent hoses , cleared the codes and now the SES light came back on with a p0171 code.system lean bank 1.
I have just done the MAF 3 months ago , and the cam position sensor on the intake side as well. I only have 35k miles on the X.
Could it be my fuel filter?
I have a AFE intake and that is it.
Thanks for any help!!!

Today the Lean bank 2 code showed up as well?
What Next??

Anyone

Tomorrow I am going to change the exhaust side cam sensor and hope that is the end of this.

I just did the exhaust side cam sensor and BAM!! the service engine light went on?

ANYONE????

In my experience ~85% of the prolblems stem from o2 sensors goi g or exhuast leaks.

Turns out my MAF went Bad!!!!
Fixed!!!

Are you putting too much oil on your AFE? The excessive oil can contaminate your MAF.

Never oiled it !
strange but it's over now, X5 runs like a champ