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P0171 Diagnostic Trouble Code Discussion for July 2012

Fuel System Lean (Bank 1)


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Trouble Ticket Help Requests for DTC P0171
Help Request Posted
2000 Ford E-350 Econoline 5.4L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1FDWE35L9Y
P0171: Lean. ... damage to the vacuum lines to the HVAC system and part of the heater plenium box had been chewed to the point outside air was coming throught the firewall. The wires going to the knock sensor had been chewed. A young tech in our shop replaced the vacuum li...
July 05, 2012
2006 Ford Five Hundred Limited 3.0L No Start, Stall, MIL Lamp on VIN: 1FAFP28146
P0171: Lean exhaust B1S1. ... came in about a week ago for a low power/check engine complaint. The problem wasn't present when the car arrived but service code P0191: Fuel pressure sensor range/performance, was present. We road tested the vehicle and found that the fuel pressure would ...
July 05, 2012
1997 Mercury Grand Marquis LS 4.6L MIL Lamp on VIN: 2MELM75W0V
P0171: Lean bank 1. Vehicle came in with lean codes. Replaced maf sensor and air filter due to trash on maf. Vehicle came back about fifty miles later with same codes plus maf intermittent code. Element on maf was dirty again. Cleaned, reset kam and test drive. Ok. Also smoked in...
July 05, 2012
2001 Volkswagen Beetle GL 2.0L MIL Lamp on VIN: 3VWBK21C91
P0171: lean condition. This one has repeatedly reset P0171. Several small vacuum leaks have been repaired and there are no driveability issues. However scanning the freeze frame for this last occurence of the code shows all values maxed out, RPM 10,200 VSS 255 kmH, etc. Has anyone e...
July 05, 2012
1997 Plymouth Grand Voyager SE 3.3L No Start VIN: 1P4GP44R6V
P0171: Fuel System Lean (Bank 1). Help I have been working on this vehicle trying to find a intermittent driveability problem. Every once and awhile the engine would mis-fire and sometimes backfire. Pryer to this visit I had already replace the crankshaft sensor. The fuel pressure was good wit...
July 06, 2012
2006 Chevrolet Cobalt SS 2.4L No Start VIN: 1G1AM15B16
P0171: Fuel System Lean. Cust complained was very hard to start. Started fine, scan engine light had a code for the intake cam solenoid. Was not acting up but replaced the solenoid and did ofl. Car ran fine. Cust brought back next day said still hard to start, can not duplicate any ha...
July 16, 2012
2003 Oldsmobile Alero GL 2.2L Poor Idle Quality, Hesitation, Cuts out, Stall, MIL Lamp on VIN: 1G3NL52F23
P0171: Fuel Trim System Lean. Customer went to visit his daughter in hospital,car was running fine.after visiting with her the car was running like crap!could barely get it to my shop the next day.the exhaust was making a weird popping noise at the tailpipe.he said the check engine light n...
July 17, 2012
1996 Chevrolet Impala SS 5.7L No Start, Stall VIN: 1G1BL52P9T
P0171: Fuel Trim System Lean (Bank 1). Fuel pressure at service port on rail is 20 psi.Fuel pressure on feed line(which is the bigger line) is 20 psi.When I disconnect line to test pressure fuel shoots out like a fire hose.Someone told me of a forum online that the pump wiring in fuel pump kit is b...
July 18, 2012
2003 Infiniti G35 3.5L MIL Lamp on VIN: JNKCV51E93
P0171: Fuel Trim Lean (Bank 1). ... with this Infiniti. Approx. 2 months ago this G35 came in with DTC P0171 and a slight hesitation. Ended up replacing the MAF. Last week the vehicle came back with DTC's P0171 & P0174. Checked the freeze frame data and found the codes set while driving ...
July 25, 2012
2000 Nissan Sentra SE 2.0L Poor Idle Quality, MIL Lamp on VIN: 3N1BB51A1Y
P0171: Fuel Trim Lean. ... sentra came in with a recurring P0171, set on every test drive. Bank 1 o2 was stuck 800mv (rich, which I don't get), but still stuck so we replaced it per the TSB EC02-002. Code never set over next 100mi, so we didn't pay much attention to it. Came back 1 ...
July 26, 2012
2002 BMW X5 3.0i 3.0L No Start, Poor Idle Quality VIN: 5UXFA53532
P0171: System lean bank 1. I have a question about fuel transfer in the fuel tank of this X5 3.0. It came in as a vehicle that either ran really bad or did not start at all, depending on its mood that day. The air boot was torn, so we replaced it. The car actually ran worse after that. ...
July 27, 2012
1999 Jaguar XK8 4.0L MIL Lamp on VIN: SAJGX2041X
P0171: Lean system bank 1. ... info. SES light is on p0171, p0174 lean codes. Long term 12-15% at idle, 19.62% maxed out at cruise and loaded both banks. Smoked intake system fixed every visable leak and there were several, no change. Cleaned MAF no change and then replaced, no change. ...
July 30, 2012
2000 Nissan Sentra SE 2.0L Poor Idle Quality, MIL Lamp on VIN: 3N1BB51A1Y
P0171: Fuel Trim Lean. ... sentra came in with a recurring P0171, set on every test drive. Bank 1 o2 was stuck 800mv (rich, which I don't get), but still stuck so we replaced it per the TSB EC02-002. Code never set over next 100mi, so we didn't pay much attention to it. Came back 1 ...
July 30, 2012
2000 Toyota Corolla VE 1.8L Hesitation, Misfire, MIL Lamp on VIN: 2T1BR12E9Y
P0171: Fuel System Too Lean (Bank 1). ... hesitation problem. will run for 1/2 hour fine and then go to take off ( esp. making a left turn) and it will not go for 10-15 seconds ( doesn't die altogether but won't rev over 1200 rpm. has had intermittent P0171 code on and off over the past 3 years bu...
July 30, 2012
2004 Subaru Impreza WRX 2.0L Excessive Emissions VIN: JF1GG29624
P0171: Fuel System Too Lean (Bank 1). Good morning, We need some help here, 2004 WRX was highly modified from a used car lot that we do rpairs for, we have never before not been able to correct an emissions failure. as you can see the GPM are very high so the problem should be obvious.--Fyi limits...
July 31, 2012
2000 Ford E-350 Econoline 5.4L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1FDWE35L9Y
P0171: Lean. ... damage to the vacuum lines to the HVAC system and part of the heater plenium box had been chewed to the point outside air was coming throught the firewall. The wires going to the knock sensor had been chewed. A young tech in our shop replaced the vacuum li...
July 05, 2012
2006 Ford Five Hundred Limited 3.0L No Start, Stall, MIL Lamp on VIN: 1FAFP28146
P0171: Lean exhaust B1S1. ... came in about a week ago for a low power/check engine complaint. The problem wasn't present when the car arrived but service code P0191: Fuel pressure sensor range/performance, was present. We road tested the vehicle and found that the fuel pressure would ...
July 05, 2012
1997 Mercury Grand Marquis LS 4.6L MIL Lamp on VIN: 2MELM75W0V
P0171: Lean bank 1. Vehicle came in with lean codes. Replaced maf sensor and air filter due to trash on maf. Vehicle came back about fifty miles later with same codes plus maf intermittent code. Element on maf was dirty again. Cleaned, reset kam and test drive. Ok. Also smoked in...
July 05, 2012
2001 Volkswagen Beetle GL 2.0L MIL Lamp on VIN: 3VWBK21C91
P0171: lean condition. This one has repeatedly reset P0171. Several small vacuum leaks have been repaired and there are no driveability issues. However scanning the freeze frame for this last occurence of the code shows all values maxed out, RPM 10,200 VSS 255 kmH, etc. Has anyone e...
July 05, 2012
1997 Plymouth Grand Voyager SE 3.3L No Start VIN: 1P4GP44R6V
P0171: Fuel System Lean (Bank 1). Help I have been working on this vehicle trying to find a intermittent driveability problem. Every once and awhile the engine would mis-fire and sometimes backfire. Pryer to this visit I had already replace the crankshaft sensor. The fuel pressure was good wit...
July 06, 2012
2006 Chevrolet Cobalt SS 2.4L No Start VIN: 1G1AM15B16
P0171: Fuel System Lean. Cust complained was very hard to start. Started fine, scan engine light had a code for the intake cam solenoid. Was not acting up but replaced the solenoid and did ofl. Car ran fine. Cust brought back next day said still hard to start, can not duplicate any ha...
July 16, 2012
2003 Oldsmobile Alero GL 2.2L Poor Idle Quality, Hesitation, Cuts out, Stall, MIL Lamp on VIN: 1G3NL52F23
P0171: Fuel Trim System Lean. Customer went to visit his daughter in hospital,car was running fine.after visiting with her the car was running like crap!could barely get it to my shop the next day.the exhaust was making a weird popping noise at the tailpipe.he said the check engine light n...
July 17, 2012
1996 Chevrolet Impala SS 5.7L No Start, Stall VIN: 1G1BL52P9T
P0171: Fuel Trim System Lean (Bank 1). Fuel pressure at service port on rail is 20 psi.Fuel pressure on feed line(which is the bigger line) is 20 psi.When I disconnect line to test pressure fuel shoots out like a fire hose.Someone told me of a forum online that the pump wiring in fuel pump kit is b...
July 18, 2012
2003 Infiniti G35 3.5L MIL Lamp on VIN: JNKCV51E93
P0171: Fuel Trim Lean (Bank 1). ... months ago this G35 came in with DTC P0171 and a slight hesitation. Ended up replacing the MAF. Last week the vehicle came back with DTC's P0171 & P0174. Checked the freeze frame data and found the codes set while driving ...
July 25, 2012
2000 Nissan Sentra SE 2.0L Poor Idle Quality, MIL Lamp on VIN: 3N1BB51A1Y
P0171: Fuel Trim Lean. ... sentra came in with a recurring P0171, set on every test drive. Bank 1 o2 was stuck 800mv (rich, which I don't get), but still stuck so we replaced it per the TSB EC02-002. Code never set over next 100mi, so we didn't pay much attention to it. Came back 1 ...
July 26, 2012
2002 BMW X5 3.0i 3.0L No Start, Poor Idle Quality VIN: 5UXFA53532
P0171: System lean bank 1. I have a question about fuel transfer in the fuel tank of this X5 3.0. It came in as a vehicle that either ran really bad or did not start at all, depending on its mood that day. The air boot was torn, so we replaced it. The car actually ran worse after that. ...
July 27, 2012
1999 Jaguar XK8 4.0L MIL Lamp on VIN: SAJGX2041X
P0171: Lean system bank 1. ... info. SES light is on p0171, p0174 lean codes. Long term 12-15% at idle, 19.62% maxed out at cruise and loaded both banks. Smoked intake system fixed every visable leak and there were several, no change. Cleaned MAF no change and then replaced, no change. ...
July 30, 2012
2000 Nissan Sentra SE 2.0L Poor Idle Quality, MIL Lamp on VIN: 3N1BB51A1Y
P0171: Fuel Trim Lean. ... sentra came in with a recurring P0171, set on every test drive. Bank 1 o2 was stuck 800mv (rich, which I don't get), but still stuck so we replaced it per the TSB EC02-002. Code never set over next 100mi, so we didn't pay much attention to it. Came back 1 ...
July 30, 2012
2000 Toyota Corolla VE 1.8L Hesitation, Misfire, MIL Lamp on VIN: 2T1BR12E9Y
P0171: Fuel System Too Lean (Bank 1). ... hesitation problem. will run for 1/2 hour fine and then go to take off ( esp. making a left turn) and it will not go for 10-15 seconds ( doesn't die altogether but won't rev over 1200 rpm. has had intermittent P0171 code on...
July 30, 2012
2004 Subaru Impreza WRX 2.0L Excessive Emissions VIN: JF1GG29624
P0171: Fuel System Too Lean (Bank 1). Good morning, We need some help here, 2004 WRX was highly modified from a used car lot that we do rpairs for, we have never before not been able to correct an emissions failure. as you can see the GPM are very high so the problem should be obvious.--Fyi limits...
July 31, 2012