P0171 Diagnostic Trouble Code Discussion for April 2014
Fuel System Lean (Bank 1)
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| Help Request | Posted | |
| 1998 Ford F-150 Lariat 4.6L Will not set monitor VIN: 1FTZX1769W P0171: Fuel system too lean bank 1. ... re-cap: Came in with CEL for P0171. Went to freeze frame and LTFT was29.3% but so was bank 2. Temp was 197 degrees. Vehicle speed 68 mph. smoked engine, no vacuum leaks found. On first test drive noticed Baro pid at 143 so I Removed MAF & cleaned. Afte... |
April 02, 2014 | |
| 2005 GMC Savana 2500 4.8L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1GTGG25V05 P0171: Fuel Trim System Lean (Bank 1). LTFT B1 and B2 in the 20's at idle, 1500 and 2500rpm LTFT will go down for a moment off idle. Fuel pressure is @ 62. fuel volunme is good. Smoke checked and carb spryed the intake gasket hot and cold. Adding propane thru the intake cleans up the fuel trims. mo... |
April 02, 2014 | |
| 2007 Toyota Matrix XR 1.8L MIL Lamp on VIN: 2T1KR32E87 P0171: Fuel System Too Lean (Bank 1). This is a very intermittent problem, will never do it for us, after all the tests and components replacements we've done, the customer went for her driveclean test and all monitors were reset, passed with flying colors, just came back with same code a month la... |
April 02, 2014 | |
| 1998 Ford F-150 Lariat 4.6L Will not set monitor VIN: 1FTZX1769W P0171: Fuel system too lean bank 1. ... re-cap: Came in with CEL for P0171. Went to freeze frame and LTFT was29.3% but so was bank 2. Temp was 197 degrees. Vehicle speed 68 mph. smoked engine, no vacuum leaks found. On first test drive noticed Baro pid at 143 so I Removed MAF & cleaned. Afte... |
April 03, 2014 | |
| 2002 Toyota Camry SE 2.4L Poor Idle Quality, Misfire, MIL Lamp on VIN: JTDBE32K02 P0171: Fuel System Too Lean (Bank 1). Hi evry body and thank you for your help. I have this toyota here that has lean code all the time, customer took the vehicle to mechanic shop,. They can`t do nothing for him. Engine runs bad when cold, but when warms up, runs better. Accessed for codes, show b... |
April 03, 2014 | |
| 2002 Toyota Corolla CE 1.8L Hesitation, Stall, MIL Lamp on VIN: 1NXBR12E32 P0171: Fuel System Too Lean (Bank 1). ... your help, this vehicle came into the school with a challenge, it has been to many shops with no success. This vehicle came into the school with no power, the load was 27% and the O2 sensor voltage .01 volts with the gas pedal on the floor. During our di... |
April 06, 2014 | |
| 2008 Suzuki SX4 2.0L MIL Lamp on VIN: JS2YB41368 P0171: Running lean. The one thing I've noticed is that if I erase the code and emission data as soon as I restart the car the long term trim Starts at 20.3%. I would think that it should star counting up the short term first and adding the long term trim as the short term trim re... |
April 08, 2014 | |
| 2007 Volkswagen Jetta 2.5 2.5L Surge VIN: 3VWGF71K37 P0171: System Too Lean. ... high idle. Also had a check engine light on. Scanned and found the P0171. Checked for vacuum leaks with the smoke machine and found none. Checked the MAF sensor for dirt and debris, none found. Checked the MAF with a lab... |
April 08, 2014 | |
| 2009 Nissan Quest 3.5L MIL Lamp on VIN: 5N1BV28U99 P0171: Lean bank 1. We got a 2009 Nissan Quest here with fuel trim problems at idle. The short term fuel trim constantly cycles from 25% to 0% to 25% (im reading this in OBD2 data) and we notice a surge in idle speed. Also the idle is high, about 1000+ in park/neutral. I tried... |
April 25, 2014 | |
| 2005 Toyota Sienna XLE 3.3L Poor Idle Quality, Misfire, MIL Lamp on VIN: 5TDZA22CX5 P0171: Fuel System Too Lean (Bank 1). Customer complaint is rough running; pulled codes and test drive. On the test drive vehicle looses power under acceleration, b calculated load is at 87-90%; AFS are at 3.6 to 3.8 B1 and 3.6 to 3.9 B2 rear O2 sensors are at .00 to .05 volts. Fuel trims (at id... |
April 29, 2014 | |
| 2002 Dodge Caravan SE 3.3L No Start VIN: 1B4GP25392 P0171: Fuel System Lean (Bank 1). Van came in with a no start with a lean code. Has good fuel pressure,spark and fuel tests good. (see testing results) sounds as if it is flooded so i pulled a plug and plugs were soaked with gas so i replaced them with a fresh set of champians and now if will ... |
April 30, 2014 | |
| 2005 Toyota Sienna XLE 3.3L Poor Idle Quality, Misfire, MIL Lamp on VIN: 5TDZA22CX5 P0171: Fuel System Too Lean (Bank 1). Customer complaint is rough running; pulled codes and test drive. On the test drive vehicle looses power under acceleration, b calculated load is at 87-90%; AFS are at 3.6 to 3.8 B1 and 3.6 to 3.9 B2 rear O2 sensors are at .00 to .05 volts. Fuel trims (at id... |
April 30, 2014 |
