System Too Lean Bank 1 & 2

[BMWCal_2000]

Hi guys
This is for the E85 SE 3.0L 2004
I’ve recently upgraded my stock air filter to a Cold air intake Cone filter (PRORAM 90mm Neck large cone air filter with velocity stack and coupling)
For the first 2 days I had no issues and it sounds really nice.
But unfortunately today I had a Engine Warning light appear on my dash. I plugged in my diagnostic tool and it flagged up saying;
P0171
System too lean bank 1,
P0174
System too lean bank 2.
I was hoping someone may understand why this has happened and if anyone may have any solutions that I can try to hopefully resolve this.

 

[Smartbear]

Removing the oem airbox has altered the airflow into the engine causing lean running, the car will try to adjust the fuelling up to a certain parameter.
Clear the code & see if it returns, i wouldn’t be driving it hard until the light has remained off for a while.
Rob

 

[Rockhopper]

Or your rubber intake tube has got a split in it.

 

[enuff_zed]

Or when you reassembled it you didn't quite get all the pipework sealed up right.
It's easy to think its ok, but it could be skewed somewhere you can't see.

 

[BMWCal_2000]

Thank you for the advice I will find someone who can clear it for me and see how it goes and I’ll double check I have connected it correctly and has not got an air leak

 

[Rockhopper]

The new air filter is in front of the MAF so the problem is either the MAF or somewhere between the MAF and the cylinder head. The new filter itself won't be the issue here.