Jaguar PCV Valve Vacuum Leak & Lean Codes
February 26, 2012 How To Auto Repair, Lean Codes 2 Comments
© DenLorsTools.com Summary: Lean codes P0171 and P0174 are some of the most common codes there are for Ford and Jaguars. If the car runs lean enough there can also be a misfire code. Here’s a recent question from one of our readers. See the original article linked towards the bottom of this page.