2016 Volvo xc90 loud whistle P0171
Loud whine, whistle, code P0171 (Lean Code). This is from a failing oil trap which is the PCV system. The oil trap assembly needs replaced. I would suggest FCPEuro.com for your parts. They are covering all parts with a Lifetime Warranty. They carry Genuine Volvo parts at a great price as well as very good aftermarket parts and OE supplier parts!!! This is a pretty simple repair... Follow along

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