P0171 Diagnostic Trouble Code Discussion for February 2004
Fuel System Lean (Bank 1)
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| Help Request | Posted | |
| 2001 Kia Rio 1.5L MIL Lamp on VIN: KNADC12331 P0171: Fuel System Too Lean. freeze frame shows fuel trim st.-10.2%,and lt.at -20.3%.freeze frame set at 43mph.no vacume leaks found.i tested maf with my vantage and passed. |
February 02, 2004 | |
| 1999 Toyota Tacoma Pre Runner 3.4L Hesitation, MIL Lamp on VIN: 4TASN92N8X P0171: Fuel System Too Lean (Bank 1). Vehicle came in with bad hesitation and CE light on. Will only pick up RPM when accellerating slowly, falls on it's face with hard accelleration. Code PO171 lean system was retreived. Thought it was a no brainer, clogged fuel filter. We replaced a partially re... |
February 02, 2004 | |
| 1996 Honda Odyssey EX 2.2L MIL Lamp on VIN: JHMRA187OT P0171: Fuel System Too Lean (Bank 1). re-occuring mil code po171 checked for vacuum leaks ?? found none, orginal o2 sensors still in place, due to cost oem want to be sure at this point, cleared same code 2 weeks ago returned snap on scanner trouble shooter indicated could be caused by faulty gaso... |
February 03, 2004 | |
| 1998 Ford E-150 Econoline 4.2L Surge, Misfire, MIL Lamp on VIN: 1FTRE1420W P0171: system lean bank 1. Several codes - PO340 cam sensor ck fault. PO171 system lean bank 1 PO174 system lean bank 2 PO300 random misfire. Erased codes and they came back after driving two times. Test drove felt like engine miss, could hear spark knock with engine cover off. Check d... |
February 04, 2004 | |
| 1999 Ford Explorer Sport 4.0L Excessive Emissions, Poor Idle Quality, Poor Fuel Economy, MIL Lamp on VIN: 1FMYU24X6X P0171: Bank 1 too lean. ... came in with code P0171(system lean, bank 1)and P0174 (system lean Bank 2). Could not find anything that looked bad, but put 2 new o2 sensors in it. It came back next day with the light back on and the customer complained of a poor idle. Brought it back in... |
February 04, 2004 | |
| 1998 Ford E-150 Econoline 4.2L Surge, Misfire, MIL Lamp on VIN: 1FTRE1420W P0171: system lean bank 1. Several codes - PO340 cam sensor ck fault. PO171 system lean bank 1 PO174 system lean bank 2 PO300 random misfire. Erased codes and they came back after driving two times. Test drove felt like engine miss, could hear spark knock with engine cover off. Check d... |
February 05, 2004 | |
| 2002 Ford Econoline E350 Super Duty 5.4L lean bank 1 VIN: 1FDZE45M42 P0171: lean bank 1. Hello all, Veh came in with p0171 bank 1 lean. replaced both o2 sensors. no help. ecm shows correction for condition in short and long term fuel trim. FYI these ford cng vehicles only have 2 o2 sensors and the misfire monitor is disabled. vac leak test was n... |
February 05, 2004 | |
| 1999 Toyota 4Runner Limited 3.4L MIL Lamp on VIN: JT3NH87R7X P0171: Fuel System Too Lean (Bank 1). ... 4MO AGO, O2 SENSOR 2WEEKS AGO (ANOTHER SHOP ON BOTH)NOW CODE P0171 PRESENT, NOT TO FAMILIAR ON ASIAN, DO MOSTLY EUROPEAN WORK, ALDATA NOT MUCH HELP, PULLED INFO FROM TRUCK WITH gENISYS W/ASIAN 2003 SOFTWARE, THANK YOU IN ADVANCE, (pardon all caps) |
February 05, 2004 | |
| 1999 Chevrolet K2500 Suburban 7.4L Poor Idle Quality, Hesitation, Misfire, MIL Lamp on VIN: 3GNGK26J3X P0171: Fuel Trim System Lean (Bank 1). ... check engine light on and a P0171 lean bank one code. We checked it over and replaced the upstream 02 sensor, cleared the code and returned the vehicle to the customer. Then the fuel pump quit, and we replaced that. Then the vehicle came back with P0171 an... |
February 06, 2004 | |
| 2000 Nissan Maxima GLE 3.0L MIL Lamp on VIN: JN1CA31D5Y P0171: Fuel Trim Lean (Bank 1). Hey guys just hoping a one of you will recognize this code as something common. We suspect vacuum leak, maybe manifold but I dont think its common is it? Smoke test showed no sign of leak. Car runs fine with no complaint from customer. Are mass airflows common... |
February 06, 2004 | |
| 1996 Ford Contour GL 2.0L Poor Idle Quality, Surge, Cuts out, Misfire, MIL Lamp on VIN: 1FALP6534T P0171: System lean. Hi all, I have a contour that has a hunting (up and down) idle,will kill in drive at stops. Mileage has gone down.New fuel pump, pressure and volume good.Plugs look sooty, Egr shows working on scanner during test drive. No back pressure with gauge in exhaust.C... |
February 11, 2004 | |
| 1998 Honda Civic DX 1.6L MIL Lamp on VIN: 1HGEJ6122W P0171: Fuel System Too Lean. This car has been in twice now for a MIL on with code po171 fuel metering lean. We cleaned the injectors the first time but returned later with the same code. Car starts and runs great with no other complaints other than the MIL on. Fuel psi. good at 38psi. We... |
February 17, 2004 | |
| 1999 Ford Explorer Sport 4.0L Excessive Emissions, Poor Idle Quality, Poor Fuel Economy, MIL Lamp on VIN: 1FMYU24X6X P0171: Bank 1 too lean. ... came in with code P0171(system lean, bank 1)and P0174 (system lean Bank 2). Could not find anything that looked bad, but put 2 new o2 sensors in it. It came back next day with the light back on and the customer complained of a poor idle. Brought it back in... |
February 18, 2004 | |
| 1995 Volvo 850 T-5R 2.3L MIL Lamp on VIN: YV1LS5719S P0171: system too lean. hi felow tech.this is my first posting.this 1995 850 turbo come in with check engine light on.i have po171 code .system too lean.ltft is -24.7%.iam confused car is runing lean and pcm taking away fuel.check with baum tool got code 231.when i clear code lomg te... |
February 19, 2004 | |
| 1996 Chevrolet Blazer 4.3L MIL Lamp on VIN: 1GNDT13W5T P0171: Fuel System Lean (Bank 1). when i started the vehicle cold it seemed to me that the fan clutch was already engaged, like it was 90 degrees out. could this cause the ect to set this code and then block to correct. if the customer replaced the thermostat because of fan clutch problem i'm ... |
February 20, 2004 | |
| 1999 Ford Explorer Sport 4.0L No Start, Poor Idle Quality, MIL Lamp on, Lean idle VIN: 1FMYU24E2X P0171: Bank 1 system lean. This sport utility came in as a no start, but as in many cases with these and leaking intakes, I pushed the accelerator and it started. It wanted to die when I let it come back down to idle, but I helped it along by feathering the gas pedal. Once I got it insi... |
February 20, 2004 | |
| 1999 Ford Windstar LX 3.8L MIL Lamp on VIN: 2FMZA5147X P0171: o2 sensor 1 bank 1 lean condition. ... Windstar that keeps setting trouble code # P0171, Lean condition O2-1 bank 1. and P0174, Lean condition O2-1 bank 2. I have checked for vacuum leaks by visually inspection as well as spraying carb cleaner around intake ect. (A smoke machine is not availab... |
February 20, 2004 | |
| 1997 Dodge Ram 1500 Laramie 5.9L Cuts out, Stall, Misfire, Poor Fuel Economy, MIL Lamp on VIN: 3B7HC13Z0V P0171: b1s1 o2 sensor. this truck came from another facility, customer complaint is after driving for at least 150 miles or so, engine will start to blow black smoke, die and leave him stranded, dealer has replaced computer, fuel pump, regulator, oxygen sensors have been replaced 2o... |
February 23, 2004 | |
| 1998 Ford Expedition Eddie Bauer 5.4L MIL Lamp on VIN: 1FMPU18LXW P0171: lean exhaust bank 1. ... reoccuring code P0171. Lean exhaust bank 1. Vehicle orriginally came in with 54,905 miles and code P0171. Everything checked ok and drive cycle passed. Returned with 55,359 miles and had code p0717 returned. Found tsb for upstream o2 sensor getting water f... |
February 23, 2004 | |
| 2002 Chevrolet Tahoe LS 5.3L MIL Lamp on VIN: 16NEC13Z32 P0171: Fuel Trim System Lean (Bank 1). ... Brought in running good no MIL. Checked history found P0171,0174,0300. cleared history. Brought in aweek later, running fine, MIL on. Codes P0171,0174. Checked MAF, fuel pressure, vacuum leaks, usual suspects, found loose evap solenoid on top of manifold. ... |
February 26, 2004 | |
| 1996 Mercury Mystique GS 2.0L Stall, Misfire, MIL Lamp on VIN: 1MELM6535T P0171: lean condition. Hello all, this car will set a misfire code on #1 cylinder only when cold.You can clear the code when warm and run the car all day and it will never set a code.In the morning it will set a code right away.I have checked the ignition on a scope and checked out... |
February 26, 2004 | |
| 2000 Toyota 4Runner Limited 3.4L MIL Lamp on P0171: Fuel System Too Lean (Bank 1). this 4runner just lacks power. po171 present. the long term fuel trim is at 39 in freeze frame. no vac leaks, fuel pressure is ok. I'm going to look at the mass air flow sensor real carefully tomorrow. Any ideas would be greatly appreciated. |
February 26, 2004 | |
| 1996 Mercury Mystique GS 2.0L Stall, Misfire, MIL Lamp on VIN: 1MELM6535T P0171: lean condition. Hello all, this car will set a misfire code on #1 cylinder only when cold.You can clear the code when warm and run the car all day and it will never set a code.In the morning it will set a code right away.I have checked the ignition on a scope and checked out... |
February 27, 2004 |
