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P0171 Diagnostic Trouble Code Discussion for May 2019

Fuel System Lean (Bank 1)

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Trouble Ticket Help Requests for DTC P0171
Help Request Posted
2013 Ford Fusion S 2.5L MIL Lamp on, P0171 VIN: 3FA6P0G73D
P0171: Fuel system lean. Read related history. Goofed and put message there.
May 06, 2019
2001 Chrysler Town & Country EX 3.8L Excessive Emissions, Poor Idle Quality, Cuts out
P0171: Fuel System Lean (Bank 1). ... power. I went to move it the next day and the starter would only click. Replaced the starter to find EXTREME hard starting, its no wonder the starter was bad. With a little rev and pushing past some hard starts, it fired right up and runs rough. It wil...
May 09, 2019
2002 Ford E-350 Super Duty 5.4L MIL Lamp on VIN: 1FDWE35L42
P0171: Lean exhust. Truck came into the shop complaining about misfires when it rained . Didn’t see any problems there spayed water no misfire at that time so I went to mode 6 saw 5678 missfires on cly 5 and no missfires on 1 . And also had lean codes po171 and p0 174 so went...
May 14, 2019
2009 Ford Expedition EL Limited 5.4L Hesitation VIN: 1FMFK20509
P0171: Bank one lean. Came In for a hesitation under load, codes for both banks lean. Volumetric efficiency test found it's not perfect but also not bad considering the mileage. Monitoring fuel trims while driving found that Everytime it happens short term drops to -20 range on...
May 24, 2019
2012 Mercedes-Benz C250 1.8L Excessive Emissions, Misfire, Poor Fuel Economy, MIL Lamp on VIN: WDDGJ4HB7C
P0171: System lean bank1. car came in running,found fuel trims were at max.i used propane and found leaks around intake so I replaced intake gaskets and rechecked still seams that the propane will affect the fuel trim.was wondering what I may be missing?no other leaks are noticeabl...
May 24, 2019
2014 Lexus CT200h 1.8L MIL Lamp on VIN: JTHKD5BH2E
P0171: Lean Bank 1. Vehicle came in with P0171 and P3190. LTFT will not come down even with STFT in negative. Found white smoke from tailpipe. Found oil over a quart overfilled from recent (1 week) LOF. Found oil drips from PCV hose when I performed smoke test. Corrected oil ...
May 30, 2019