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P0171 Diagnostic Trouble Code Discussion for February 2013

Fuel System Lean (Bank 1)


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Trouble Ticket Help Requests for DTC P0171
Help Request Posted
2006 Hummer H3 3.5L MIL Lamp on VIN: 5GTDN13636
P0171: Fuel Trim System Lean. truck runs good,no apperant vaccum leaks,throttle body has been cleaned.If the MAF sensor is unpluged fuel trims come back into line.but known good part did not help!
February 01, 2013
2007 Land Rover Range Rover HSE 4.4L MIL Lamp on VIN: SALMF154X7
P0171: Lean bank one. Have p0171 p0174, return after approx one hundred miles, completes drive cycle before flagging fault. We have replaced mass air flow. We smoke tested intake system, we did see smoke from egr, thought this was normal. Long term adaptions for bank one are 14. Lo...
February 07, 2013
2000 Ford Focus SE 2.0L MIL Lamp on VIN: 1FAFP34P5Y
P0171: lean bank 1. lean exhaust only @ IDLE, FUEL TRIM LONG TERM 32% SHORT TERM GETS TO 42% GOOD FUEL PRESSURE, NO VACUUM LEAKS. MAF ALREADY REPLACED.
February 13, 2013
2007 GMC Canyon SLT 3.7L MIL Lamp on VIN: 1GTDT13E37
P0171: Fuel System Lean. ... customer that had a service engine soon light on he stopped at the shop and I pulled the codes they were a P0102 MAF sensor circuit low frequency and P0449 EVAP vent solenoid control circuit. He was in a hurry so I cleared codes and he made a apointment fo...
February 13, 2013
1999 Saab 9-5 SE 2.3L Poor Idle Quality VIN: YS3EF45E3X
P0171: too lean. ... to correct the problem of engine stalling after hard acceleration and a sudden slow down.Once stalled eng was hard to restart.Check eng light on p0171 & p0300.smoked check of intake found 2 leakes.repaired leaks clear...
February 16, 2013
2004 Ford Freestar SEL 4.2L MIL Lamp on VIN: 2FMZA52234
P0171: Exhaust System Lean Bank 1. ... November 16, with a check engine light on and a code P0401 Insufficent EGR flow detected stored in the ecm. Checked system and diagnosed bad EGR Valve and replaced. Van returned on January 4, with a check engine light on and code P0171 exhaust system lean ...
February 18, 2013
1999 Toyota 4Runner SR5 3.4L MIL Lamp on VIN: JT3GN86R2X
P0171: Fuel System Too Lean (Bank 1). first time it came in with p0171 found vacuum hose to intake resonator unplugged. cleared code and came back after 3day... checked air induction pipes some loose tighten and cleaned maf sensor. long term fuel trim is at -7 and maf grams /sec is at 3.8. thanks ...
February 19, 2013
2004 Chevrolet Venture LT 3.4L MIL Lamp on VIN: 1GNDX13E84
P0171: Fuel Trim System Lean (Bank 1). keeps running lean, what am i missing, o2's appear to be working properly. have smoked for leaks and only smoke seen is coming from base of egr out of the vent slots
February 21, 2013
2004 BMW X3 3.0i 3.0L MIL Lamp on VIN: WBXPA93474
P0171: lean bank 1. po171 and p0174 set. smoke tested cold and no problems found. fuel pressure and volume good. pcv system replace 4 years ago as well as intake flap. replaced maf and codes comes back . no vacuum at dipstick tube. runs good and has no other problems.
February 22, 2013
2008 Jeep Wrangler X 3.8L Cuts out, MIL Lamp on VIN: 1J4FZ24158
P0171: Fuel lean 1/1. First off thanks for any help in advance. I admit im far from being a chrysler tech and we work on very few chrysler driviability issues but were rural and there isnt anywhere close to regift this one to. Its a rural mail carrier and sees constant stop and go ...
February 26, 2013
2001 Ford F-250 Super Duty Lariat 5.4L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1FTNX21L81
P0171: Bank 1 Lean. This 5.4 has a strange problem, It runs great but intermittently it will at idle began to lose cyl #1 through #4, Cylinder contribution will show 25-35% loss and will idle very poorly, Then will clear up and run great, idle in shop for 10 minutes and all the s...
February 27, 2013
2007 Ford Mustang GT 4.6L MIL Lamp on VIN: 1ZVFT82H27
P0171: Lean bank one. We're having a strange issue with this supercharged mustang. It came in with a lean bank one code. Found long term fuel trims for both banks were at +22.4. Smoked intake and found leakage around intake boot at throttle. Repaired leaks and still had same issue....
February 28, 2013
2006 Volkswagen Jetta Value Edition 2.5L Hesitation VIN: 3VWPG71K26
P0171: lean mixfture. ... this vehicle. Customer brought car to us with the complaint of poor running after fill up. We scan for codes and found the p0171 code. We smoke tested the system and found a leak at the air intake hose between the air mass meter and the intake. Our expecta...
February 28, 2013