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P0171 Diagnostic Trouble Code Discussion for July 2014

Fuel System Lean (Bank 1)


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Trouble Ticket Help Requests for DTC P0171
Help Request Posted
2009 Chevrolet Suburban 1500 LT 5.3L Stall VIN: 1GNFK26389
P0171: fuel trim 1. I have a Suburban with 5.3l that came in on the tow truck died out in the evening before when we had 90 degree weather. The next morning would not restart. I scanned the engine 1st got the codes pulled, reset codes and the car started. I next ran the fuel pres...
July 01, 2014
2004 Chevrolet Silverado 1500 LS 5.3L Poor Idle Quality, Misfire VIN: 2GCEK13T24
P0171: Fuel Trim System Lean (Bank 1). ... p0101, p0300, p0171, u1000. it has just a slight miss at idle n gear with the a/c on. checked compression was good, checked fuel pressure was n spec. did some looking around and could only come up with a mass air flow int...
July 02, 2014
1998 Volvo S70 GLT 2.4L MIL Lamp on VIN: YV1LS5644W
P0171: veh too lean bank one. trying to do drive cicles. drive veh and after 30 minutes ck eng coming back on whith codes po 171 and po172
July 02, 2014
2004 Chevrolet Tahoe LS 5.3L MIL Lamp on VIN: 1GNEK13Z94
P0171: Fuel Trim System Lean (Bank 1). I have long term fuel trims that climb to 23-25 rapidly even right after a reset. These fuel trims stay there at all rpm's and load ranges. I'm thinking I have a logic problem in the PCM Fuel tests 10% alcohol and gravity test is normal. PCM data pid reads 10%...
July 11, 2014
2004 Ford F-150 FX4 5.4L MIL Lamp on, Slight lack of power VIN: 1FTPW14534
P0171: Lean Bank 1. ... engine light. Found the two lean codes only (P0171 and P0174). They were NOT complaining of a lack of power, it just seems that way to me. It is a lifted vehicle with large tires, so that may be the culprit. The long term fuel trims are 14-18+ at idle and ...
July 11, 2014
2003 Land Rover Discovery SE 4.6L MIL Lamp on VIN: SALTY16483
P0171: adative adaption correction bank one. Help Land Rover Techs! this Discovery is setting the above codes- we cant find any issues- o2s are switching between .04 and .85- o2 sensors behind cats are steady at .45, fuel trim a and b .99, multi trim a and b .95 and .97 and idle trim a and b are at -1.98...
July 14, 2014
1999 Ford F-250 Lariat 5.4L Poor Idle Quality, Misfire, Poor Fuel Economy, MIL Lamp on VIN: 2FTPX28L0X
P0171: Bank 1 lean. PID readings: Load=17%, Baro=149Hz, 13 PSI, LTFT banks 1 & 2= 25%, MAF= .9 volts, O211 & 12= 0 volts, O221 is switching, 22=.6 volts, STFT 1 & 2= -3% to 3%. Coolant was low, topped off, leaking from radiator. No HCs present in cooling system, oil l...
July 16, 2014
2010 Ford Focus SE 2.0L Poor Idle Quality, Stall, MIL Lamp on VIN: 1FAHP3FN4A
P0171: lean bnk 1. ... lof,front brakes,clean battery terminals,fuel system cleaning.All services where performed,car returned to customer.Customer returns car next day complains of ses lite on & stalling.ck codes koer & memory p0102 mass air flow circuit low,removed &am...
July 17, 2014
2006 BMW 530xi 3.0L Poor Idle Quality, Cuts out, Stall, MIL Lamp on VIN: WBANF73536
P0171: system lean b1. Vehicle has check engine light, sometimes will stall, when hot started, idle will fluctuate and b rough(almost misfire) po171 and 174 repeat very soon after driving. We replaced all the tubes hoses etc for crankase ventilation, as we had low vacuum reading in ...
July 18, 2014
2006 BMW 530xi 3.0L Poor Idle Quality, Cuts out, Stall, MIL Lamp on VIN: WBANF73536
P0171: system lean b1. Vehicle has check engine light, sometimes will stall, when hot started, idle will fluctuate and b rough(almost misfire) po171 and 174 repeat very soon after driving. We replaced all the tubes hoses etc for crankase ventilation, as we had low vacuum reading in ...
July 20, 2014
2005 Ford F-150 XL 4.2L MIL Lamp on VIN: 1FTRF12215
P0171: Too lean. Help Ford Techs! This F150 keeps trowing lean codes and Im not sure what the problem is, Ive resealed the upper intake and cleaned EGR valve passages, the pipe is cold at idle and all seems well, its had the PCV hose and valve replaced and no detectable vac ...
July 22, 2014
2006 Ford F-250 Super Duty XLT 5.4L MIL Lamp on, low power VIN: 1FTSW21596
P0171: Lean b1. ... truck in stating he just had spark plugs replaced(at a dif shop) and ever since then it sets p0171/174 and has low power. by low power i mean it will go hwy speeds ok but is just not the power it should be. like maybe 75% of what i feel it should have. I v...
July 24, 2014
2012 Chevrolet Malibu LT 2.4L MIL Lamp on VIN: 1G1ZC5EU3C
P0171: system lean. ... engine light on and code p0171 system lean.Upon first inspection,could see the fuel trims go to 30 at idle.And after idling for about 3 minutes the code will set.Every time.I checked it for vacuum leaks with a smoke machine,and could not find any leaks.Alt...
July 27, 2014
2006 Ford F-250 Super Duty XLT 5.4L MIL Lamp on, low power VIN: 1FTSW21596
P0171: Lean b1. ... truck in stating he just had spark plugs replaced(at a dif shop) and ever since then it sets p0171/174 and has low power. by low power i mean it will go hwy speeds ok but is just not the power it should be. like maybe 75% of what i feel it should have. I v...
July 28, 2014
2004 GMC Envoy SLE 4.2L MIL Lamp on VIN: 1GKDT13S74
P0171: Fuel System Lean (Bank 1). thanks for any help - this envoy came in with po171 lean condition - & air pump codes - replace siezed air pump & divertor valve on side of block,replaced spark plugs due to milage . smoke tested intake system hot & cold - found no leaks - disconne...
July 30, 2014