P0171 Volkswagen - can someone tell me what i need to buy?? OEM#PO171

Question

System too lean bank 1
Cylinder number 1 denotes bank 1

Answer 1

P0171 Fuel trim lean Bank 1

There are only so much cause for a lean code condtion, this can range from false air getting past the MAF (mass air flow) to the PCV system.

 Broken dipstick tube such as this VW turbo is enough to allow false air and set a P0171