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P0171 Diagnostic Trouble Code Discussion for July 2005

Fuel System Lean (Bank 1)


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Trouble Ticket Help Requests for DTC P0171
Help Request Posted
1996 Ford Contour GL 2.0L Poor Idle Quality, Surge, MIL Lamp on VIN: 1FALP653XT
P0171: lean bank 1. I am scratching my head on this one. It came in for a check engine light and idle problem. Noticed hesitation on test drive. After pulling codes and checking data I noticed the MAF wasn't responding properly. Checked MAF and found lots of contaminates on wires...
July 01, 2005
1998 Ford Escort ZX2 Cool Coupe 2.0L MIL Lamp on VIN: 3FALP1135W
P0171: system lean bank 1. ... runs great with no hesitation and a good idle. Lean code P0171 came back on after changing the MAF sensor. O2 sensor is accurate and responsive. Long term fuel trim goes to 25 at idle and short term trims climbs as well. As soon as you go above idle or dri...
July 01, 2005
1997 Ford Taurus GL 3.0L Poor Idle Quality, Stall, Misfire, MIL Lamp on VIN: 1FALP52U7V
P0171: system to lean bank 1. I have scanned, all those before mention codes.. AC most likely low on 134a I don't need help with that issue. I can hear what sounds like a vacuum leak. Ran out of time so I have not put a gauge on in and have not looked at all the the data when I scanned it ...
July 09, 2005
2000 Chevrolet Prizm 1.8L Lack of Power VIN: 1Y1SK524YZ
P0171: Fuel System Lean. Vehicle has a cold stall, lack of power when started cold. Not every time. Codes were cleared about a week ago. Have not come back. Has exhaust leak @ front pipe. Had to wait for clamp to come in. Will replace tomorrow. I didn't want to post until I had solved...
July 11, 2005
1998 Ford Escort ZX2 Cool Coupe 2.0L MIL Lamp on VIN: 3FALP1135W
P0171: system lean bank 1. ... runs great with no hesitation and a good idle. Lean code P0171 came back on after changing the MAF sensor. O2 sensor is accurate and responsive. Long term fuel trim goes to 25 at idle and short term trims climbs as well. As soon as you go above idle or dri...
July 11, 2005
2000 Chevrolet Prizm 1.8L Lack of Power VIN: 1Y1SK524YZ
P0171: Fuel System Lean. Vehicle has a cold stall, lack of power when started cold. Not every time. Codes were cleared about a week ago. Have not come back. Has exhaust leak @ front pipe. Had to wait for clamp to come in. Will replace tomorrow. I didn't want to post until I had solved...
July 13, 2005
2000 Infiniti G20 2.0L MIL Lamp on VIN: JNKCP11A6Y
P0171: Fuel Trim Lean (Bank 1). code comes on while driving or letting car sit running at idle only po 171 code no others
July 13, 2005
2000 Toyota Echo 1.5L MIL Lamp on VIN: JTDBT1234Y
P0171: Fuel System Too Lean (Bank 1). ... check engine light on, No drivability problem. Our tech inspected & scanned the engine computer system, It set code P0171 He came up with it needing F.I. service, Minor tune & Oxy.sensor. Our customer gave the Ok. The light came back on 3 days aft...
July 14, 2005
1997 Nissan Maxima GLE 3.0L ck engine light VIN: JN1CA21D1V
P0171: Fuel Trim Lean (Bank 1). Have checked map air sensor, replaced O2 sensor, checked evap. sustem. Ck engine light goes out for a day or two, and comes back on with same code (p171) appearing. Has anyone run into this before ? Thanks for your input.
July 15, 2005
2000 Toyota Corolla VE 1.8L MIL Lamp on VIN: 2T1BR18E3Y
P0171: Fuel System Too Lean (Bank 1). Hello, Customer came in with light on/Po171 system lean. Check all the basics No vacuum Leaks Fuel Pressure 45 Psi. O2 is reading .5 and drops to .02 then will shoot up to .8 volts.Causes according To alldata Vacuum Leaks/Bad injectors/ Heated o2 sensor. Th...
July 16, 2005
2000 Lexus ES300 3.0L MIL Lamp on VIN: JT8BF28G3Y
P0171: Fuel System Too Lean (Bank 1). Hello all. I have a 2000 Lexus ES300 that orginally came in for the MIL on. I pulled codes and got PO171-Fuel system lean. I installed a fuel filter,cleared codes and drove 30-40 miles,no lite. Customer returned with lite on. Looked in Identifix and found 5 re...
July 21, 2005
2002 GMC Envoy SLE 4.2L Hesitation, MIL Lamp on VIN: 1GKDT13S82
P0171: Fuel System Lean (Bank 1). the customer says the cruise will intermittently not work and truck has a slight hesitation at take off, she complained that at a stop sign it acted like it wanted to take off by itself(sounded like it tried to give itself some gas and she had to hold onto the...
July 22, 2005
2000 Mercury Mystique 2.0L MIL Lamp on
P0171: o2 lean sensor 1 bank 1. ... and this vehicle was a trade in for used car lot. We just got there used car business because they sell new Honda's and there techs. won't touch anything but a Honda. Please help this car is sold. When I first worked on the vehicle fuel pressure was way do...
July 25, 2005
2002 Chrysler Voyager 2.4L MIL Lamp on VIN: 1C4GJ25B72
P0171: Fuel System Lean. ... Voyager. Came in with check engine light on P0171. Checked all and found broken (from an accident) evap solenoid by radiator. Thougt we had it as it was a good vacuum leak. Replaced with oe valve and after 1 trip code re-set. Monitered O2 readings and upst...
July 25, 2005
2000 Mercury Mystique 2.0L MIL Lamp on
P0171: o2 lean sensor 1 bank 1. ... and this vehicle was a trade in for used car lot. We just got there used car business because they sell new Honda's and there techs. won't touch anything but a Honda. Please help this car is sold. When I first worked on the vehicle fuel pressure was way do...
July 26, 2005