Audi A4 Quattro fault code

[AudiA8Quattro]

What is the likely cause of the following fault? could this fault flash up if the clutch is slipping?


17544 - Fuel Trim: Bank 1 (Add): System too Lean
        P1136 - 35-10 -  - - Intermittent

Audi A4 1.8T 150bhp, engine code AVJ.
Thanks for any help!

[topher]

http://www.ross-tech.com/vag-com/cars/fuel-trim.html

[AudiA8Quattro]

Thanks for the reply 
I broke the news this morning, dad's car needs a new clutch, service and MOT, plus the MIL light has to be off for the MOT.
I hope his pockets are deep 

[AudiA8Quattro]

An update on this.
Plugged the car into VAG com, took if for a drive and logged it. At idle and under load the mixture is bang on.
At worse the mixture at idle is 2-4% lean, it has to be at least 10% to trigger a fault code.
What is the likely cause of the light coming on? could a dodgey load of fuel cause it?
Cheers.

[Wayne]

17544 - Fuel Trim: Bank 1 (Add): System too Lean
       

I had this code come up on mine and it was maf sensor.

[AudiA8Quattro]

Thanks mate.
The code hasn't come back since i cleared it, and it has stayed off.
I read on ross tech that bank 2 fault is likely MAF sensor fault.