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P0171 Diagnostic Trouble Code Discussion for February 2012

Fuel System Lean (Bank 1)


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Trouble Ticket Help Requests for DTC P0171
Help Request Posted
2000 Jeep Grand Cherokee Laredo 4.7L MIL Lamp on VIN: 1J4G248N6Y
P0171: Fuel System Lean (Bank 1). Greetings all. This Jeep runs lean. It will run the trims out at which then the O2 starts sweeping. I'll get this out of the way now: It does not, repeat, NOT have a PS switch. So no fluid of any kind is in the harness. Also, this V8 is ONE BANK. I have no ext...
February 02, 2012
2004 Suzuki Verona LX 2.5L MIL Lamp on, lean condition VIN: KL5VJ52L44
P0171: Fuel System Too Lean (Bank 1). ... vehicle runs fine but keeps popping codes p0171 and p0174 lean both banks. fuel pressure is at spec, replaced fuel filter, smoked engine and found no leaks but replaced pcv valve anyway. vehicle has a mass air flow sensor ...
February 03, 2012
2001 Kia Rio 1.5L Poor Idle Quality, Hesitation, Cuts out VIN: KNADC12351
P0171: Fuel System Too Lean. ... one. when first in pulled codes p0171 p1166 running lean and at max cntl. adapt. found intake man. gasket split out on #1 cyl. replaced gasket with little improvement. then after seeing previous repairs done i decided to look at valve timing. found exhaust...
February 07, 2012
1996 Mercury Villager (Van) GS 3.0L No Start, Stall VIN: 4M2DV11W6T
P0171: O2 bank 1 sensor 2. This van was towed into our shop as it just died on the hwy. When the customer was driving. We were able to get it to start for a bit and check the codes as noted. The o2 is not showing any activity at all. Have never had on of these cross bread ones here befo...
February 07, 2012
1996 Mercury Villager (Van) GS 3.0L No Start, Stall VIN: 4M2DV11W6T
P0171: O2 bank 1 sensor 2. This van was towed into our shop as it just died on the hwy. When the customer was driving. We were able to get it to start for a bit and check the codes as noted. The o2 is not showing any activity at all. Have never had on of these cross bread ones here befo...
February 08, 2012
2003 Ford Focus SE 2.3L MIL Lamp on VIN: 1FAFP34Z83
P0171: Bank 1 lean. This ford is coming in with a P0171, Before I begin, This is a 2.3l DOHC engine with electronic egr valve. I smoke tested the system and found no leaks when cold. Spray carb cleaner all around intake and did not notice any short trim change during open (engine...
February 09, 2012
2003 Volkswagen Beetle GLX 1.8L Hesitation, MIL Lamp on VIN: 3VWDD21Y13
P0171: System Lean. Intermittent lean code and pressure loss that happens randomly on decel, covered common problems such as PCV and Diverter valve, smoke checked with no results and checked all connections, live scan data reveals when problem occurs, lambda(B-1,S-1)drops from 2v...
February 10, 2012
2003 Kia Sedona EX 3.5L MIL Lamp on VIN: KNDUP13173
P0171: Fuel System Too Lean (Bank 1). ... MAF and cleared code. Car came back in a couple days with P0171 and P0174, system lean codes. We suspected the MAF sensor and replaced it again since the lean codes were not there originally. Car came back again with the l...
February 14, 2012
2003 Jaguar S-Type R 4.2L MIL Lamp on
P0171: Lean. ... supercharged car. It has p0171 and p0174 codes that come back. The car idles nice but the fuel trims keep hoing up, under load the fuel trims are normal, we have replace the maf sensor with one from an xjr but it still does...
February 16, 2012
2000 Toyota Corolla VE 1.8L Hesitation, MIL Lamp on VIN: 1NXBR12E4Y
P0171: Fuel System Too Lean (Bank 1). ... I have a 2000 corolla ve with a 1.8l auto. I keep getting a p0171 code, have replaced the MAF cause according to research it seams to be a big cause of a p0171 code, and yes it is from toyota. But still with no avail. replaced intake gaskets and injector s...
February 16, 2012
2003 BMW 330xi 3.0L Surge, MIL Lamp on VIN: WBAEW53433
P0171: B1 Lean. ... on acceleration. Had P0171 and P0174 stored and very high fuel trim values. After clearing adaptations, it runs good. Intake boots are good. Replaced oil separator and related hoses, Variable intake flap, fuel filter and MAF sensor. Oil separator was full ...
February 17, 2012
2008 Land Rover Range Rover HSE 4.4L MIL Lamp on VIN: SALME15478
P0171: lean b1. ... has po171 p0174 replaced mass air flow sensor(oe) smoked test,propane test , disabled egr and plugged the ports and smoked test , clean throtle body and still got these codes coming back fuel presure in specs (70psi) fuel trims on idle about %19 off idle g...
February 17, 2012
2001 Toyota Corolla CE 1.8L MIL Lamp on VIN: 2T1BR12E31
P0171: Fuel System Too Lean (Bank 1). This toyo is giving me fits. I have a P0171 that i can't get rid of. LTFT is steady around 32%, when i take it on a test drive at WOT it drops to 4% then returns to 32% off of WOT. I have cleaned the MAF including the hot wires inside. I have also put a new (a...
February 21, 2012
2006 Jaguar S-Type VDP Edition 4.2L MIL Lamp on VIN: SAJWA01B76
P0171: lean bank 1. ... are p0171,p0174,p050b, and p2105. i am suspecting a bad mass airlow or a vacum leak causing lean codes. but my main concern is the other 2 codes. i dont have any info on any one of them and i need some direction as to ho...
February 23, 2012
2004 Toyota Corolla CE 1.8L No Start, Cuts out, Misfire, MIL Lamp on VIN: 1NXBR32E04
P0171: Fuel System Too Lean (Bank 1). HALLO, Toyota techs...i have this corolla that doesn't want to start or it would run for a few seconds then dies and it won't start again. it has spark and fuel pressure is 45 to 50 psi. Can the Air flow meter sensor make this car not to run? Air flow meter re...
February 23, 2012
2006 Jaguar S-Type VDP Edition 4.2L MIL Lamp on VIN: SAJWA01B76
P0171: lean bank 1. ... are p0171,p0174,p050b, and p2105. i am suspecting a bad mass airlow or a vacum leak causing lean codes. but my main concern is the other 2 codes. i dont have any info on any one of them and i need some direction as to ho...
February 24, 2012
2004 Ford Focus ZX3 2.3L MIL Lamp on, P0171 VIN: 3FAFP31Z34
P0171: Lean Condition. I have a code P0171 that keeps coming back, It can take a few days or weeks to come back. This problem has been ongoing for about 4 months. I have check for vac leaks none found, check for vac leaks at PCV area, checked MAF sensor with lab scope and check sca...
February 27, 2012
2000 Jeep Grand Cherokee Laredo 4.7L MIL Lamp on VIN: 1J4G248N6Y
P0171: Fuel System Lean (Bank 1). Greetings all. This Jeep runs lean. It will run the trims out at which then the O2 starts sweeping. I'll get this out of the way now: It does not, repeat, NOT have a PS switch. So no fluid of any kind is in the harness. Also, this V8 is ONE BANK. I have no ext...
February 02, 2012
2004 Suzuki Verona LX 2.5L MIL Lamp on, lean condition VIN: KL5VJ52L44
P0171: Fuel System Too Lean (Bank 1). ... vehicle runs fine but keeps popping codes p0171 and p0174 lean both banks. fuel pressure is at spec, replaced fuel filter, smoked engine and found no leaks but replaced pcv valve anyway. vehicle has a mass air flow sensor ...
February 03, 2012
2001 Kia Rio 1.5L Poor Idle Quality, Hesitation, Cuts out VIN: KNADC12351
P0171: Fuel System Too Lean. ... one. when first in pulled codes p0171 p1166 running lean and at max cntl. adapt. found intake man. gasket split out on #1 cyl. replaced gasket with little improvement. then after seeing previous repairs done i decided to look at valve timing. found exhaust...
February 07, 2012
1996 Mercury Villager (Van) GS 3.0L No Start, Stall VIN: 4M2DV11W6T
P0171: O2 bank 1 sensor 2. This van was towed into our shop as it just died on the hwy. When the customer was driving. We were able to get it to start for a bit and check the codes as noted. The o2 is not showing any activity at all. Have never had on of these cross bread ones here befo...
February 07, 2012
1996 Mercury Villager (Van) GS 3.0L No Start, Stall VIN: 4M2DV11W6T
P0171: O2 bank 1 sensor 2. This van was towed into our shop as it just died on the hwy. When the customer was driving. We were able to get it to start for a bit and check the codes as noted. The o2 is not showing any activity at all. Have never had on of these cross bread ones here befo...
February 08, 2012
2003 Ford Focus SE 2.3L MIL Lamp on VIN: 1FAFP34Z83
P0171: Bank 1 lean. This ford is coming in with a P0171, Before I begin, This is a 2.3l DOHC engine with electronic egr valve. I smoke tested the system and found no leaks when cold. Spray carb cleaner all around intake and did not notice any short trim change during open (engine...
February 09, 2012
2003 Volkswagen Beetle GLX 1.8L Hesitation, MIL Lamp on VIN: 3VWDD21Y13
P0171: System Lean. Intermittent lean code and pressure loss that happens randomly on decel, covered common problems such as PCV and Diverter valve, smoke checked with no results and checked all connections, live scan data reveals when problem occurs, lambda(B-1,S-1)drops from 2v...
February 10, 2012
2003 Kia Sedona EX 3.5L MIL Lamp on VIN: KNDUP13173
P0171: Fuel System Too Lean (Bank 1). ... MAF and cleared code. Car came back in a couple days with P0171 and P0174, system lean codes. We suspected the MAF sensor and replaced it again since the lean codes were not there originally. Car came back again with the l...
February 14, 2012
2003 Jaguar S-Type R 4.2L MIL Lamp on
P0171: Lean. ... supercharged car. It has p0171 and p0174 codes that come back. The car idles nice but the fuel trims keep hoing up, under load the fuel trims are normal, we have replace the maf sensor with one from an xjr but it still does...
February 16, 2012
2000 Toyota Corolla VE 1.8L Hesitation, MIL Lamp on VIN: 1NXBR12E4Y
P0171: Fuel System Too Lean (Bank 1). ... I have a 2000 corolla ve with a 1.8l auto. I keep getting a p0171 code, have replaced the MAF cause according to research it seams to be a big cause of a p0171 code, and yes it is from toyota. But still with no avail. replaced intake gaskets and injector s...
February 16, 2012
2003 BMW 330xi 3.0L Surge, MIL Lamp on VIN: WBAEW53433
P0171: B1 Lean. ... on acceleration. Had P0171 and P0174 stored and very high fuel trim values. After clearing adaptations, it runs good. Intake boots are good. Replaced oil separator and related hoses, Variable intake flap, fuel filter and MAF sensor. Oil separator was full ...
February 17, 2012
2008 Land Rover Range Rover HSE 4.4L MIL Lamp on VIN: SALME15478
P0171: lean b1. ... has po171 p0174 replaced mass air flow sensor(oe) smoked test,propane test , disabled egr and plugged the ports and smoked test , clean throtle body and still got these codes coming back fuel presure in specs (70psi) fuel trims on idle about %19 off idle g...
February 17, 2012
2001 Toyota Corolla CE 1.8L MIL Lamp on VIN: 2T1BR12E31
P0171: Fuel System Too Lean (Bank 1). This toyo is giving me fits. I have a P0171 that i can't get rid of. LTFT is steady around 32%, when i take it on a test drive at WOT it drops to 4% then returns to 32% off of WOT. I have cleaned the MAF including the hot wires inside. I have also put a new (a...
February 21, 2012
2006 Jaguar S-Type VDP Edition 4.2L MIL Lamp on VIN: SAJWA01B76
P0171: lean bank 1. ... are p0171,p0174,p050b, and p2105. i am suspecting a bad mass airlow or a vacum leak causing lean codes. but my main concern is the other 2 codes. i dont have any info on any one of them and i need some direction as to ho...
February 23, 2012
2004 Toyota Corolla CE 1.8L No Start, Cuts out, Misfire, MIL Lamp on VIN: 1NXBR32E04
P0171: Fuel System Too Lean (Bank 1). HALLO, Toyota techs...i have this corolla that doesn't want to start or it would run for a few seconds then dies and it won't start again. it has spark and fuel pressure is 45 to 50 psi. Can the Air flow meter sensor make this car not to run? Air flow meter re...
February 23, 2012
2006 Jaguar S-Type VDP Edition 4.2L MIL Lamp on VIN: SAJWA01B76
P0171: lean bank 1. ... are p0171,p0174,p050b, and p2105. i am suspecting a bad mass airlow or a vacum leak causing lean codes. but my main concern is the other 2 codes. i dont have any info on any one of them and i need some direction as to ho...
February 24, 2012
2004 Ford Focus ZX3 2.3L MIL Lamp on, P0171 VIN: 3FAFP31Z34
P0171: Lean Condition. I have a code P0171 that keeps coming back, It can take a few days or weeks to come back. This problem has been ongoing for about 4 months. I have check for vac leaks none found, check for vac leaks at PCV area, checked MAF sensor with lab scope and check sca...
February 27, 2012