Join Now

P0171 Diagnostic Trouble Code Discussion for April 2010

Fuel System Lean (Bank 1) *

Note: This is a professional automotive technician's resource.

Vehicle Owners: If you are seeking an automotive repair professional to service your vehicle, visit the iATN Repair Shop Finder.

Trouble Ticket Help Requests for DTC P0171

	Help Request	Posted
	2005 Chrysler PT Cruiser GT 2.4L No Start VIN: 3C8FY78G25 P0171: Fuel System Lean. Hi guys. This one has me baffled. Customer scheduled an appointment earlier in the week for sputtering complaint and a check engine light on. It got towed in as a no start. Has good fuel pressure and 130 pounds of compression - followed diagnostic tree to repl...	April 01, 2010
	2002 Ford Windstar SE 3.8L Poor Idle Quality, Misfire VIN: 2FMZA51402 P0171: Sys too lean B1. We've either got a weird one or we're overlooking something. My tech and I have this 02 windstar here, originally had an EGR no flow code and sys too lean both banks. Fixed the EGR w/ a DPFE, no problem. It will miss a little cold, and we checked the most comm...	April 02, 2010
	2009 Toyota Tacoma 2.7L Misfire, MIL Lamp on VIN: 5TENX22N29 P0171: bank 1 lean. have no info on were to go toyota tech help needed have no tests done made sure all connections were good and mo vacuum leaks need some advice where to go and what to do like i said im a chevy tech with no access to toyota info	April 05, 2010
	2008 Land Rover Range Rover Sport Supercharged 4.2L MIL Lamp on VIN: SALSH23438 P0171: systen lean-bank1. ... check engine light comes on and car goes in to limp home. Owner restarts vehicle and engine functions normally. Problem is intermittent. I scanned engine management system using Autologic and found the three codes listed below. Smoking the intake found...	April 06, 2010
	1998 Mercury Mystique LS 2.5L MIL Lamp on VIN: 1MEFM66LXW P0171: Lean bank 1. This car is eating my lunch! I have been working on it for days with no changes in the long term fuel trims. They are maxed at 25% and hence setting both bank lean codes. You can see below what I have already done. When I originally got the vehicle it had a br...	April 15, 2010
	2001 Mercury Sable LS 3.0L Poor Idle Quality, Stall, MIL Lamp on VIN: 1MEFM55511 P0171: lean bank 1. hello this is my first posting i hope someone can help me with this one.customer brought in this vehicle said it struges to stay running.at first when i started the vehicle the idle went up to 2000 rpm for about 4 seconds and then dropped to undre 500 rpm and ...	April 16, 2010
	2004 Ford F-150 XLT 5.4L MIL Lamp on, No power and rattle VIN: 1FTPW12574 P0171: B1 lean. The complaint is that the truck will not accelerate above 3000rpm under load and at about that point begins to rattle pretty bad. It feels ok at cruise or light accel. The LT fuel trims= B1+29% and B2+10%. The fuel rail was removed and injector inlets inspecte...	April 19, 2010
	2003 Volkswagen Passat GLS 1.8L Poor Idle Quality, MIL Lamp on VIN: WVWVD63B83 P0171: . repaired several vacuum leaks, replaced 3 coils and all spark plugs, customer always runs 87 octane when premium is called for we alwayws fill with premium and it ran well. now the rough idle will not go away in closed loop. runs well down the road with plenty...	April 19, 2010
	2005 Ford F-150 FX4 5.4L Misfire, MIL Lamp on VIN: 1FTPX04595 P0171: bank 1 lean. Ok this vehicle cam in with engine noise and a missfire.Upon inspection I found a bad injector on #6 cylinder that had stuck open.replaced injector and removed oil pan for inspection.Had bent #6 rod.removed cylinder head and replaced rod and piston.Now that ve...	April 20, 2010
	1998 Mercury Mountaineer 4.0L MIL Lamp on VIN: 4M2ZU54E9W P0171: System too lean bank 1. ... vehicle came in with the check engine light on and P0171 and P0174 stored. MAF was cleaned and upper and lower intake seals were replaced. Also repaired exhaust leak on bank 1 between front pipe and manifold, which appeared to...	April 20, 2010
	2001 Toyota Camry LE 2.2L MIL Lamp on VIN: JT2BG22K81 P0171: Fuel System Too Lean (Bank 1). Greetings to all this car came from another shop,they have been chasing a code po171 they have changed the air fuel ratio sensor using o.e. They also have changed the rear o2 with after market sensor.i did look at fuel trim readings and short term is -18 long ...	April 20, 2010
	2001 BMW 330Ci 3.0L Surge, MIL Lamp on VIN: WBABN534X1 P0171: System too lean. Missing something here. Modis european software. Freeze frame codes sets at idle, stft 18.8 % ltft 7.8 % bank i and ii same. Oxygen sensor voltages forward the same. Smoke checked intake, valve cover, breather to crankcase vent valve. Can find no more false ai...	April 21, 2010
	2007 Ford Crown Victoria Police Interceptor 4.6L Stall, MIL Lamp on VIN: 2FAFP71W07 Hello fellow ford techs, have this 07 police interceptor with lean on both bank codes. Fuel pressure ok, haven't found any vacuum leaks. Long term trims are 25 right and left. Replaced mass airflow, which usually takes care of this issue. No change in readings...	April 21, 2010
	1997 Chevrolet Express 1500 4.3L No Start, Hesitation, MIL Lamp on VIN: 1GCFG15W5V P0171: Fuel Trim System Lean (Bank 1). It also had a code p0420 cat eff. It had this pile of codes in it so i cleared and po340 keeps returning i think i should get that problem first.Owner said doesn't start sometime.I put a new delphi pump in at his request back in January.of course it has starte...	April 22, 2010
	2004 Ford E-250 4.6L Poor Idle Quality, MIL Lamp on VIN: 1FTNE24W0H P0171: System lean bank one. ... system lean code P0171 for bank one. The engine does idle a little bit rough. Freeze frame data indicates the code was set at idle on a hot engine. LTFT1 over 25%, STFT1 over 20%. Cleared the PCM. Now at idle, STFT1 is anywhere from 15% - 25%. However, STF...	April 23, 2010
	2000 Nissan Sentra GXE 1.8L Poor Idle Quality, Hesitation, Cuts out VIN: 3N1CB51D8Y P0171: Fuel Trim Lean. Vehicle came in with complaint of intermittent no power. I was able to confirm on a test drive and in the shop. At wot I was holding at 20 mph. TPS , intake temp, coolant temp all looked normal. Maf reading looks erratic and tops out at 2.8 volts while rpm top...	April 23, 2010
	1996 Ford Contour GL 2.0L Poor Idle Quality, Hesitation, Surge, Stall, MIL Lamp on VIN: 1FALP6539T P0171: lean. ... speed. It came in with a complaint if intermittent stall or hesitation when taking off from a stop, intermittent idle surge, and a p0171 lean code. It already had a new Bosch oxygen sensor and a reman MAF. It's a Ford, so the first thing I did was check fo...	April 28, 2010
	2004 Ford E-250 5.4L Misfire VIN: 1FTSS34L34 P0171: lean bank 1. comp on affected cylinders is 165 and 160 coils and plugs were replaced with new no vacum leaks detected injecters are firing checked with noid lite and solarity scope vacum is stable at 20 in	April 28, 2010
	1996 Ford Contour GL 2.0L Poor Idle Quality, Hesitation, Surge, Stall, MIL Lamp on VIN: 1FALP6539T P0171: lean. ... speed. It came in with a complaint if intermittent stall or hesitation when taking off from a stop, intermittent idle surge, and a p0171 lean code. It already had a new Bosch oxygen sensor and a reman MAF. It's a Ford, so the first thing I did was check fo...	April 29, 2010