P0171 2006 FORD F150 – Fuel Injection System Too Lean Bank 1

 

P0171: DIY Repairing Video Tutorial

https://youtu.be/nZPJGtZxzko

Check out nonda Auto DIY Center for more engine error code repairing videos.
https://www.youtube.com/playlist?list=PL-Lyko0O0oxHe1AGvzwAz-wokJPXAtW97

 

P0171 2006 FORD F150 Possible Symptoms

  Engine Light ON (or Service Engine Soon Warning Light),Excessive Fuel Consumption  

P0171 2006 FORD F150 Possible Causes

  Intake air leaks,Faulty front heated oxygen sensor,Ignition misfiring,Faulty fuel injectors,Exhaust gas leaks,Incorrect fuel pressure,Lack of fuel,Faulty Mass Air Flow (MAF) sensor,Incorrect Positive Crankcase Ventilation (PCV) hose connection  

P0171 2006 FORD F150 Description

  With the Air/Fuel Mixture Ratio Self-Learning Control, the actual mixture ratio can be brought closely to the theoretical mixture ratio based on the mixture ratio feedback signal from the heated oxygen sensors 1. The Engine Control Module (ECM) calculates the necessary compensation to correct the offset between the actual and the theoretical ratios. In case the amount of the compensation value is extremely large (The actual mixture ratio is too lean.), the ECM judges the condition as the fuel injection system malfunction and light up the Malfunction Indicator Light (MIL) (2 trip detection logic).