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P0171 Diagnostic Trouble Code Discussion for January 2012

Fuel System Lean (Bank 1)


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Trouble Ticket Help Requests for DTC P0171
Help Request Posted
2003 GMC Savana 3500 6.0L Cuts out, MIL Lamp on VIN: 1GDHG31U33
P0171: Fuel Trim System Lean (Bank 1). i have this truck and i am hoping i could get some help not sure where to go from here..problem is that the engine turns over fine but but will not fire unless you press the gas pedal down as soon as you let go it stalls only cold when it warms up it runs fine...
January 06, 2012
2001 Toyota Celica GT 1.8L MIL Lamp on
P0171: Fuel System Too Lean (Bank 1). car came in with cel on and code p0171 system lean.see freeze frame data is in "testing and results" below.i know these maf's can have issues with codes and no symptom, so after checking for intake leaks and 02 sensor i replaced it with a toyota oe maf...
January 08, 2012
2004 Ford F-150 Lariat 5.4L Poor Idle Quality, MIL Lamp on
P0171: Bank 1 Lean. This F-150 has Lean DTC's and A/F and O2 Stuck lean DTC's for both banks. Has a rough idle, occasionally stalls. Restarts no problem and seems to drive fine off idle. Short term fuel trims are maxed out at 45% and still no voltage output from the Oxygen sensor...
January 10, 2012
2000 Toyota Celica GT 1.8L MIL Lamp on VIN: JTDDR32T9Y
P0171: Fuel System Too Lean (Bank 1). ... where to go next with this one. This vehicle has been back to the shop several times with a p0171 lean code. Freeze frame date shows code is setting at idle. Short term fuel trim is 4.7 @680 rpm, long term fuel trim is + 32.8 @ 680. fuel pressure is 50 {in...
January 10, 2012
2006 Volkswagen Beetle 2.5 2.5L MIL Lamp on VIN: 3VWSF31Y56
P0171: bank 1 lean. Vehicle has mil on for p0171. Fuel trims are high +17% long term. MAF appears to be responding correctly. Unable to find any vac leaks. Is 46 psi fuel pressure too low. Any input would be appreciated.
January 11, 2012
2005 Chevrolet Silverado 1500 5.3L No Start VIN: 1GCEK19T35
P0171: Fuel Trim System Lean (Bank 1). This truck runs very rich the lt fuel trim is about -17 on both banks but when it is cold the truck will not start sprayed intake for vacuum leaks none found, pickup does not have a fuel pressure regulator to leak fuel pressure is at 62 psi, ran vehicle with m...
January 16, 2012
2005 Chevrolet Silverado 1500 5.3L No Start VIN: 1GCEK19T35
P0171: Fuel Trim System Lean (Bank 1). This truck runs very rich the lt fuel trim is about -17 on both banks but when it is cold the truck will not start sprayed intake for vacuum leaks none found, pickup does not have a fuel pressure regulator to leak fuel pressure is at 62 psi, ran vehicle with m...
January 18, 2012
2001 Chevrolet Blazer LS 4.3L MIL Lamp on VIN: 1GNDT13W41
P0171: Fuel System Lean (Bank 1). Help !!! this is driving me crazy the 171 code will set within 5 min, after two trips it will turn light on every time.even after clearing codes the ltft % will still be at +25 % but the avg will be at 0 is this normal for a snap on modis? tried to disconnect ...
January 26, 2012
2001 Toyota Corolla CE 1.8L Excessive Emissions, Hesitation, MIL Lamp on VIN: 1NXBR12E71
P0171: Fuel System Too Lean (Bank 1). Thanks to all in advance. This 2001 toyota corolla 1.8l has a po171 which is the customers only complaint. On inspection we noticed the O2 sensor goes full rich(Over 900mv)when accelerated over 2000rpm and stays there until returned to idle. At idle it fluctua...
January 26, 2012
2006 Kia Spectra EX 2.0L no MIL lamp VIN: KNAFE121X6
P0171: Fuel System Too Lean (Bank 1). The car runs good, the only noticable event on the test drive was thatt the heat disapeared while at a light. There are no lights on or noticable symptoms, but while I scan the car it has 9 current codes, with no MIL illuminated. I checked the obvious, the lig...
January 28, 2012
2002 Toyota Corolla CE 1.8L MIL Lamp on VIN: 1NXBR12E42
P0171: Fuel System Too Lean (Bank 1). I have this corolla that is eating my sleep. all these years i have worked on toyotas and lexus and this is the one that got me. I could not figure out now what to do. I have measured the fuel pressure that was about 37psi at idle. next morning before starting...
January 28, 2012
2003 GMC Savana 3500 6.0L Cuts out, MIL Lamp on VIN: 1GDHG31U33
P0171: Fuel Trim System Lean (Bank 1). i have this truck and i am hoping i could get some help not sure where to go from here..problem is that the engine turns over fine but but will not fire unless you press the gas pedal down as soon as you let go it stalls only cold when it warms up it runs fine...
January 06, 2012
2001 Toyota Celica GT 1.8L MIL Lamp on
P0171: Fuel System Too Lean (Bank 1). car came in with cel on and code p0171 system lean.see freeze frame data is in "testing and results" below.i know these maf's can have issues with codes and no symptom, so after checking for intake leaks and 02 sensor i replaced it with a toyota oe maf...
January 08, 2012
2004 Ford F-150 Lariat 5.4L Poor Idle Quality, MIL Lamp on
P0171: Bank 1 Lean. This F-150 has Lean DTC's and A/F and O2 Stuck lean DTC's for both banks. Has a rough idle, occasionally stalls. Restarts no problem and seems to drive fine off idle. Short term fuel trims are maxed out at 45% and still no voltage output from the Oxygen sensor...
January 10, 2012
2000 Toyota Celica GT 1.8L MIL Lamp on VIN: JTDDR32T9Y
P0171: Fuel System Too Lean (Bank 1). ... where to go next with this one. This vehicle has been back to the shop several times with a p0171 lean code. Freeze frame date shows code is setting at idle. Short term fuel trim is 4.7 @680 rpm, long term fuel trim is + 32.8 @ 680. fuel pressure is 50 {in...
January 10, 2012
2006 Volkswagen Beetle 2.5 2.5L MIL Lamp on VIN: 3VWSF31Y56
P0171: bank 1 lean. Vehicle has mil on for p0171. Fuel trims are high +17% long term. MAF appears to be responding correctly. Unable to find any vac leaks. Is 46 psi fuel pressure too low. Any input would be appreciated.
January 11, 2012
2005 Chevrolet Silverado 1500 5.3L No Start VIN: 1GCEK19T35
P0171: Fuel Trim System Lean (Bank 1). This truck runs very rich the lt fuel trim is about -17 on both banks but when it is cold the truck will not start sprayed intake for vacuum leaks none found, pickup does not have a fuel pressure regulator to leak fuel pressure is at 62 psi, ran vehicle with m...
January 16, 2012
2005 Chevrolet Silverado 1500 5.3L No Start VIN: 1GCEK19T35
P0171: Fuel Trim System Lean (Bank 1). This truck runs very rich the lt fuel trim is about -17 on both banks but when it is cold the truck will not start sprayed intake for vacuum leaks none found, pickup does not have a fuel pressure regulator to leak fuel pressure is at 62 psi, ran vehicle with m...
January 18, 2012
2001 Chevrolet Blazer LS 4.3L MIL Lamp on VIN: 1GNDT13W41
P0171: Fuel System Lean (Bank 1). Help !!! this is driving me crazy the 171 code will set within 5 min, after two trips it will turn light on every time.even after clearing codes the ltft % will still be at +25 % but the avg will be at 0 is this normal for a snap on modis? tried to disconnect ...
January 26, 2012
2001 Toyota Corolla CE 1.8L Excessive Emissions, Hesitation, MIL Lamp on VIN: 1NXBR12E71
P0171: Fuel System Too Lean (Bank 1). Thanks to all in advance. This 2001 toyota corolla 1.8l has a po171 which is the customers only complaint. On inspection we noticed the O2 sensor goes full rich(Over 900mv)when accelerated over 2000rpm and stays there until returned to idle. At idle it fluctua...
January 26, 2012
2006 Kia Spectra EX 2.0L no MIL lamp VIN: KNAFE121X6
P0171: Fuel System Too Lean (Bank 1). The car runs good, the only noticable event on the test drive was thatt the heat disapeared while at a light. There are no lights on or noticable symptoms, but while I scan the car it has 9 current codes, with no MIL illuminated. I checked the obvious, the lig...
January 28, 2012
2002 Toyota Corolla CE 1.8L MIL Lamp on VIN: 1NXBR12E42
P0171: Fuel System Too Lean (Bank 1). I have this corolla that is eating my sleep. all these years i have worked on toyotas and lexus and this is the one that got me. I could not figure out now what to do. I have measured the fuel pressure that was about 37psi at idle. next morning before starting...
January 28, 2012