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P0171 Diagnostic Trouble Code Discussion for June 2005

Fuel System Lean (Bank 1)


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Trouble Ticket Help Requests for DTC P0171
Help Request Posted
2001 Nissan Pathfinder LE 3.5L MIL Lamp on VIN: JN8DR07Y21
P0171: Fuel Trim Lean (Bank 1). ... After additional ground for MAF and exhaust repair, P0171 is the only code that returns. Truck runs great otherwise. Any help will be appreciated.
June 03, 2005
2001 Infiniti I30 3.0L Hesitation, MIL Lamp on VIN: JNKCA31A11
P0171: Fuel Trim Lean (Bank 1). This is my first time asking for help so please if i am not providing info the way you like let me know. Customer came in with a mil light on, code stored po171 system too lean bank one.He was also complaining of a hesitation on cold start up. We cleaned his t...
June 06, 2005
2001 Nissan Pathfinder SE 3.5L MIL Lamp on, Lean condition VIN: JN8DR09X8W
P0171: Fuel Trim Lean (Bank 1). We have tried the same procedure as last year with little results. The MAF sensor ground was weak so we updated it and condition improved slightly but codes are still present. Could not find any TSB's on this perticular problem. Has any one come across this be...
June 07, 2005
1996 Ford Crown Victoria LX 4.6L No Start, Stall VIN: 2FALP74W4T
P0171: Right bank lean. Hello iATN Techs, This Crown Vic has me clueless as to its problem. The car was driven one day and the next day would not run. It will start, sounds good and runs for about one second, then dies. It will not try to start again unless you turn the key off and t...
June 14, 2005
2000 Toyota 4Runner Limited 3.4L Hesitation, Surge, Cuts out, MIL Lamp on VIN: JT3H87R3Y0
P0171: Fuel System Too Lean (Bank 1). ... falls on its face as soon as you want to move. This a close friend's, that was supposed to come in last month when the MIL first came on, and it was still running fine. I had it towed this morning, with a complaint that he could not get it to go anywhere. ...
June 14, 2005
2002 Volvo V70 2.4L MIL Lamp on VIN: YV1SW61N61
P0171: Fuel trim lean condition. Intermittently the CEL comes on and a stored Po171 DTC. During Cruse the Long Term Trim goes up to 18 % right away and than back to 0 % during decel. Is this normal? I have only seen this on short term before. I removed the Maf and found a small amount of oil ...
June 15, 2005
2000 Ford Escort LX 2.0L Poor Idle Quality, Stall, MIL Lamp on VIN: 3FAFP13P1Y
P0171: lean bank 1. Hello, I need help on this car, I'm in my second day of diag.I have check The archives and found alot of PCV system leaks. I made sure this is not my problem on this engine. Also I see maf's are a real problem and made sure to eliminate it as a problem. This ...
June 16, 2005
1999 Ford Ranger XL 2.5L MIL Lamp on VIN: 1FTYR10C6X
P0171: System Lean - Bank 1. ... grateful to anyone taking the time to read it and offer assistance. This is a personal daily driver that I picked up at a local used car lot a couple weeks ago. CarFax and seller info indicates that the vehicle was purchased at CoPart auction in Kansas Ci...
June 17, 2005
2000 Ford Escort LX 2.0L Poor Idle Quality, Stall, MIL Lamp on VIN: 3FAFP13P1Y
P0171: lean bank 1. Hello, I need help on this car, I'm in my second day of diag.I have check The archives and found alot of PCV system leaks. I made sure this is not my problem on this engine. Also I see maf's are a real problem and made sure to eliminate it as a problem. This ...
June 17, 2005
2001 Ford Escort SE 2.0L MIL Lamp on VIN: 3FAFP13P51
P0171: Sys too lean. This escort came in with the MIL light on. LTFT pegged at 25 at idle, goes down with rpms. Smoke checked for vacuum leaks. Disconnected the vacuum to fuel pressure reg and let it idle @ 42psi, no change. Found a bit of a misfire stored in the mode 6 info, 163 ...
June 17, 2005
2001 Nissan Pathfinder LE 3.5L MIL Lamp on VIN: JN8DR07Y21
P0171: Fuel Trim Lean (Bank 1). ... After additional ground for MAF and exhaust repair, P0171 is the only code that returns. Truck runs great otherwise. Any help will be appreciated.
June 20, 2005
2001 Toyota Corolla CE 1.8L MIL Lamp on VIN: 12WEFG1V51
P0171: Fuel System Too Lean (Bank 1). Car came in with mil on and code po171. Checked for vac leaks, non found. Checked fuel pressure it was at 45-47 psi. No exhaust leaks found. Injectors all dropped the same amount of pressure when I tested them w/ an OTC injector tester. I did replace the o2 se...
June 21, 2005
2000 Volvo V70 2.4L MIL Lamp on VIN: YV1LW61J9Y
P0171: Anyones guess. ... came in with the MIL on. I retrieved code P0171 fuel trim at it's limit. FF data indicated that the problem occurred at idle, hot and LTFT was more than +20 %. After verifying no vacuum leaks (smoke machine), fuel pressure in spec (46 psi KOEO; MOD says 4...
June 21, 2005
2004 Chevrolet Corvette Z06 5.7L MIL Lamp on VIN: 1G1YY12S84
P0171: Fuel System Lean (Bank 1). after initial install of new maf sensor vehicle driven 68miles reset both codes. I got vehicle and went thru it and reflashed ecm and codes reset in 25miles.When you reset fuel trim in service bay the engine will lope and o2 volts will be at .052 volts,short t...
June 22, 2005
2000 Volvo V70 2.4L MIL Lamp on VIN: YV1LW61J9Y
P0171: Anyones guess. ... came in with the MIL on. I retrieved code P0171 fuel trim at it's limit. FF data indicated that the problem occurred at idle, hot and LTFT was more than +20 %. After verifying no vacuum leaks (smoke machine), fuel pressure in spec (46 psi KOEO; MOD says 4...
June 24, 2005
1997 Volvo 850 GLT 2.4L MIL Lamp on VIN: YV1LW5640V
P0171: system too lean bank 1. Confounded by this vehicle. Clear the code and within 10 miles MIL back on. No discernable vacuumn leaks. Replaced O2 sensor - no change (sensor functions perfectly). Tried new MAF- no difference. Volvo-specific scanner doesn't help with fault listings.Cn you ...
June 29, 2005
2001 Hyundai Santa Fe GL 2.4L MIL Lamp on VIN: KM8SB82B21
P0171: Fuel System Too Lean (Bank 1). Hyundai Guru's - Need Help with a PO171 Lean bank 1 code. Smoke test showed no vac leaks. Freeze frame info: ST 12.7%, LT 12.5%, 28% calc load, 35mph. Verified this condition on road test and in neutral at 2500rpm and idle. Cannot check fuel psi unfortunately ...
June 30, 2005
1997 Volvo 850 GLT 2.4L MIL Lamp on VIN: YV1LW5640V
P0171: system too lean bank 1. Confounded by this vehicle. Clear the code and within 10 miles MIL back on. No discernable vacuumn leaks. Replaced O2 sensor - no change (sensor functions perfectly). Tried new MAF- no difference. Volvo-specific scanner doesn't help with fault listings.Cn you ...
June 30, 2005
2001 Nissan Pathfinder LE 3.5L MIL Lamp on VIN: JN8DR07Y21
P0171: Fuel Trim Lean (Bank 1). ... After additional ground for MAF and exhaust repair, P0171 is the only code that returns. Truck runs great otherwise. Any help will be appreciated.
June 03, 2005
2001 Infiniti I30 3.0L Hesitation, MIL Lamp on VIN: JNKCA31A11
P0171: Fuel Trim Lean (Bank 1). This is my first time asking for help so please if i am not providing info the way you like let me know. Customer came in with a mil light on, code stored po171 system too lean bank one.He was also complaining of a hesitation on cold start up. We cleaned his t...
June 06, 2005
2001 Nissan Pathfinder SE 3.5L MIL Lamp on, Lean condition VIN: JN8DR09X8W
P0171: Fuel Trim Lean (Bank 1). We have tried the same procedure as last year with little results. The MAF sensor ground was weak so we updated it and condition improved slightly but codes are still present. Could not find any TSB's on this perticular problem. Has any one come across this be...
June 07, 2005
1996 Ford Crown Victoria LX 4.6L No Start, Stall VIN: 2FALP74W4T
P0171: Right bank lean. Hello iATN Techs, This Crown Vic has me clueless as to its problem. The car was driven one day and the next day would not run. It will start, sounds good and runs for about one second, then dies. It will not try to start again unless you turn the key off and t...
June 14, 2005
2000 Toyota 4Runner Limited 3.4L Hesitation, Surge, Cuts out, MIL Lamp on VIN: JT3H87R3Y0
P0171: Fuel System Too Lean (Bank 1). ... falls on its face as soon as you want to move. This a close friend's, that was supposed to come in last month when the MIL first came on, and it was still running fine. I had it towed this morning, with a complaint that he could not get it to go anywhere. ...
June 14, 2005
2002 Volvo V70 2.4L MIL Lamp on VIN: YV1SW61N61
P0171: Fuel trim lean condition. Intermittently the CEL comes on and a stored Po171 DTC. During Cruse the Long Term Trim goes up to 18 % right away and than back to 0 % during decel. Is this normal? I have only seen this on short term before. I removed the Maf and found a small amount of oil ...
June 15, 2005
2000 Ford Escort LX 2.0L Poor Idle Quality, Stall, MIL Lamp on VIN: 3FAFP13P1Y
P0171: lean bank 1. Hello, I need help on this car, I'm in my second day of diag.I have check The archives and found alot of PCV system leaks. I made sure this is not my problem on this engine. Also I see maf's are a real problem and made sure to eliminate it as a problem. This ...
June 16, 2005
1999 Ford Ranger XL 2.5L MIL Lamp on VIN: 1FTYR10C6X
P0171: System Lean - Bank 1. ... grateful to anyone taking the time to read it and offer assistance. This is a personal daily driver that I picked up at a local used car lot a couple weeks ago. CarFax and seller info indicates that the vehicle was purchased at CoPart auction in Kansas Ci...
June 17, 2005
2000 Ford Escort LX 2.0L Poor Idle Quality, Stall, MIL Lamp on VIN: 3FAFP13P1Y
P0171: lean bank 1. Hello, I need help on this car, I'm in my second day of diag.I have check The archives and found alot of PCV system leaks. I made sure this is not my problem on this engine. Also I see maf's are a real problem and made sure to eliminate it as a problem. This ...
June 17, 2005
2001 Ford Escort SE 2.0L MIL Lamp on VIN: 3FAFP13P51
P0171: Sys too lean. This escort came in with the MIL light on. LTFT pegged at 25 at idle, goes down with rpms. Smoke checked for vacuum leaks. Disconnected the vacuum to fuel pressure reg and let it idle @ 42psi, no change. Found a bit of a misfire stored in the mode 6 info, 163 ...
June 17, 2005
2001 Nissan Pathfinder LE 3.5L MIL Lamp on VIN: JN8DR07Y21
P0171: Fuel Trim Lean (Bank 1). ... After additional ground for MAF and exhaust repair, P0171 is the only code that returns. Truck runs great otherwise. Any help will be appreciated.
June 20, 2005
2001 Toyota Corolla CE 1.8L MIL Lamp on VIN: 12WEFG1V51
P0171: Fuel System Too Lean (Bank 1). Car came in with mil on and code po171. Checked for vac leaks, non found. Checked fuel pressure it was at 45-47 psi. No exhaust leaks found. Injectors all dropped the same amount of pressure when I tested them w/ an OTC injector tester. I did replace the o2 se...
June 21, 2005
2000 Volvo V70 2.4L MIL Lamp on VIN: YV1LW61J9Y
P0171: Anyones guess. ... came in with the MIL on. I retrieved code P0171 fuel trim at it's limit. FF data indicated that the problem occurred at idle, hot and LTFT was more than +20 %. After verifying no vacuum leaks (smoke machine), fuel pressure in spec (46 psi KOEO; MOD says 4...
June 21, 2005
2004 Chevrolet Corvette Z06 5.7L MIL Lamp on VIN: 1G1YY12S84
P0171: Fuel System Lean (Bank 1). after initial install of new maf sensor vehicle driven 68miles reset both codes. I got vehicle and went thru it and reflashed ecm and codes reset in 25miles.When you reset fuel trim in service bay the engine will lope and o2 volts will be at .052 volts,short t...
June 22, 2005
2000 Volvo V70 2.4L MIL Lamp on VIN: YV1LW61J9Y
P0171: Anyones guess. ... came in with the MIL on. I retrieved code P0171 fuel trim at it's limit. FF data indicated that the problem occurred at idle, hot and LTFT was more than +20 %. After verifying no vacuum leaks (smoke machine), fuel pressure in spec (46 psi KOEO; MOD says 4...
June 24, 2005
1997 Volvo 850 GLT 2.4L MIL Lamp on VIN: YV1LW5640V
P0171: system too lean bank 1. Confounded by this vehicle. Clear the code and within 10 miles MIL back on. No discernable vacuumn leaks. Replaced O2 sensor - no change (sensor functions perfectly). Tried new MAF- no difference. Volvo-specific scanner doesn't help with fault listings.Cn you ...
June 29, 2005
2001 Hyundai Santa Fe GL 2.4L MIL Lamp on VIN: KM8SB82B21
P0171: Fuel System Too Lean (Bank 1). Hyundai Guru's - Need Help with a PO171 Lean bank 1 code. Smoke test showed no vac leaks. Freeze frame info: ST 12.7%, LT 12.5%, 28% calc load, 35mph. Verified this condition on road test and in neutral at 2500rpm and idle. Cannot check fuel psi unfortunately ...
June 30, 2005
1997 Volvo 850 GLT 2.4L MIL Lamp on VIN: YV1LW5640V
P0171: system too lean bank 1. Confounded by this vehicle. Clear the code and within 10 miles MIL back on. No discernable vacuumn leaks. Replaced O2 sensor - no change (sensor functions perfectly). Tried new MAF- no difference. Volvo-specific scanner doesn't help with fault listings.Cn you ...
June 30, 2005