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P0171 Diagnostic Trouble Code Discussion for March 2006

Fuel System Lean (Bank 1)


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Trouble Ticket Help Requests for DTC P0171
Help Request Posted
1999 Hyundai Sonata 2.4L Poor Idle Quality, Surge, Cuts out, MIL Lamp on VIN: KMHWF2533X
P0171: Lean Exhaust. Car runs fine when warm. We let car sit outside for several hours, when started, it ran so bad we could hardley get it in garage.
March 03, 2006
1999 Isuzu Rodeo LS 3.2L Poor Idle Quality, Misfire, MIL Lamp on VIN: 4S2CK58W5X
P0171: Fuel System Too Lean (Bank 1). Hello all This vehicle came in today with a steady miss and poor idle. We scanned and showed a miss on #3 cyl. I swapped coils between 1 and 3 cyls and still showed miss #3. Compression was 165# in that hole and plug was replaced while it was out. We can pull ...
March 06, 2006
1999 Ford Escort SE 2.0L MIL Lamp on VIN: 3FAFP15P3X
P0171: Lean Bank 1. ... engine runs well, power is OK but trips code P0171 constantly w/fuel trim readings at + 23 on up. Naturally, checked for intake manifold gasket & all other sources of vacuum leaks including PCV valve, no sign of any. Propane enrichment does drive fuel ...
March 07, 2006
1996 Ford Explorer Eddie Bauer 4.0L Poor Idle Quality, Misfire VIN: 1FMDU34X8T
P0171: bank 1 system too lean. Hi everyone, this truck is giving me a lot of problems. It came in for a check engine light on and rough running all the time. I code scanned the truck and found the codes P017I and P1074, #1 & 2 banks too lean. I also checked fuel pressure and it ranges f...
March 08, 2006
2000 Ford Focus SE 2.0L MIL Lamp on VIN: 1FAFP34P1Y
P0171: Lean Bank 1. ... perpetual P0171 lean exhaust condition. Car runs absolutely flawless w/plenty of pep. At idle LT fuel trim is +31 & short term at +12 trying to push it even higher!!! Days earlier, I had the same symptom on a '99 escort w/same powertrain & fix was ...
March 09, 2006
2000 Volkswagen Beetle GL 2.0L MIL Lamp on VIN: JSH4YIW746
P0171: Bank 1 sytem too lean. hey guys got this beetle that is driving me crazy.Car came in with misfire codes secondary air system codes fixed all of these problems but this car keeps coming back with the above code i am thinking it is the air flow meter.Could some body give the specified...
March 09, 2006
2000 Dodge Grand Caravan SE 3.0L MIL Lamp on VIN: 2B4GP4434Y
P0171: Fuel System Lean (Bank 1). Not sure what to think about this one. Back probed O2 and add propane. Voltage shoots right up to .9+ and exhaust gas shows lambda .8. But the rich/lean pid on modis still reads lean. Just want to make sure I havent missed something before recomend a ECU.
March 13, 2006
1998 Ford Windstar GL 3.8L Poor Idle Quality, Hesitation, Cuts out, Poor Fuel Economy, MIL Lamp on VIN: 2FMZA5148W
P0171: Lean B1. Cust complaint of chk engine light, poor fuel economy. We checked the intake. No sign of excess oil leak. Checked archivewes and found tsb for upper and lower intake. Lower did not appear to have a problem with oil soaking the rubber. Changed the upper gasket ...
March 13, 2006
2001 Land Rover Discovery Series II LE 4.0L No star when cold
P0171: Bank 1 system lean. The car came in the shop with the complain of no start when engine is cold. The engine starts ok if sprayed with starting fluid. I checked for codes and found codes P 0171 and P 0174, both banks running lean. Checked for vacuum leaks and didn't find any leaks....
March 13, 2006
2001 Ford Windstar SEL 3.8L MIL Lamp on VIN: 2FMZA53421
P0171: system too lean bank 1. this is the second van with same issue... other van not repaired yet... manifold tuning valve on both vans had front clips broken... replaced clip on one van and engine light came back on after two day's... same system lean faults... do not want to condem o2 s...
March 14, 2006
2001 Land Rover Discovery Series II LE 4.0L No star when cold
P0171: Bank 1 system lean. The car came in the shop with the complain of no start when engine is cold. The engine starts ok if sprayed with starting fluid. I checked for codes and found codes P 0171 and P 0174, both banks running lean. Checked for vacuum leaks and didn't find any leaks....
March 14, 2006
1999 Pontiac Firebird 3.8L No Start, Poor Idle Quality, Cuts out, MIL Lamp on VIN: 2G2FS22K8X
P0171: Fuel Trim System Lean (Bank 1). ... basics,spark fuel,fuses,etc...service computer stated to hook scan tool and test app sensor 3 for .5-1.3v-no voltage indicated.referred to replace tac module.after replacement same symptoms occur.have tested in detail map,maf and crank sensors all check ok...
March 14, 2006
2000 Ford F-150 4.2L MIL Lamp on VIN: IFTZX1727Y
P0171: system lean b1. ... codes pulled p0171 and p0174. noted small intake leak and repaired. Cleared codes and drove truck. Light comes back on after 20 - 50 miles. Live data looks good on all 4 o2 sensors. I must be over looking something but not sure what.
March 16, 2006
1998 Ford E-150 Econoline 5.4L MIL Lamp on VIN: 1FDRE14L6W
P0171: Lean bank 1. This van came in about 2 months ago with MIL on and no drivability concerns. Scanned codes PO171&PO174, lean both banks. Checked for external vacuum leaks including the PCV hose assembly at rear of intake and found no obvious problems. Both codes were stor...
March 17, 2006
1999 Ford E-250 Econoline 4.2L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1FTPE2424X
P0171: System Too Lean B1. This van has me pulling my hair out. Vehicle came to me after another shop couldn't solve the misfire. Scanned vehicle and initally found misfire codes for cyl 4, 5, and 6 on bank 2. Test drove and noticed engine slightly missing at idle in park and it gets mu...
March 18, 2006
2002 Ford Windstar SE Sport 3.8L Hesitation, Surge, Cuts out, Stall VIN: 2FMZA57412
P0171: Trim System Lean Bank 1. This vehicle is a family friends car. I do not have an access to a scan equipment to give me more accurate readi ngs. Our Nissan Consult will not read the data from Ford vehicle. Original problem with the vehicle was that the motor will idle well but will not ...
March 18, 2006
2000 Ford F-150 4.2L MIL Lamp on VIN: IFTZX1727Y
P0171: system lean b1. ... codes pulled p0171 and p0174. noted small intake leak and repaired. Cleared codes and drove truck. Light comes back on after 20 - 50 miles. Live data looks good on all 4 o2 sensors. I must be over looking something but not sure what.
March 21, 2006
2002 Oldsmobile Bravada 4.2L Poor Idle Quality, Misfire, Poor Fuel Economy, MIL Lamp on VIN: 1GHDT13S42
P0171: Fuel System Lean (Bank 1). We still have a rough idle and code p0171 sets right after codes are cleared and run for 1 minute. The CEL comes on after the engine is shut off and restarted.
March 21, 2006
1999 Volkswagen Jetta GL 2.0L MIL Lamp on VIN: 3VWPA8147X
P0171: system lean. car came in with ceck eng lite on cecked fuel pressure ok cecked for leaks none found cleared codes drove evap code came back po442 car runs ok need help please no vw check equip.
March 21, 2006
2002 Oldsmobile Bravada 4.2L Poor Idle Quality, Misfire, Poor Fuel Economy, MIL Lamp on VIN: 1GHDT13S42
P0171: Fuel System Lean (Bank 1). We still have a rough idle and code p0171 sets right after codes are cleared and run for 1 minute. The CEL comes on after the engine is shut off and restarted.
March 23, 2006
1999 Lexus LS400 4.0L MIL Lamp on VIN: JT88H28F5X
P0171: Fuel System Too Lean (Bank 1). car runs well. no symptoms other than one dtc (po171) lean condition bank one.
March 24, 2006
1999 Chevrolet S10 LS 4.3L MIL Lamp on VIN: 1GCCS19X0X
P0171: Fuel System Lean. ... owned by a local company. They brought truck in for a engine noise which turned out to be a rod knock and a oil pan full of metal. They elected to have a reman. unit installed which we did. Upon road testing the vehicle the ses gave us the p0171 and p0174/...
March 27, 2006
2001 Chevrolet Tahoe 5.3L Poor Idle Quality, MIL Lamp on VIN: 1GNEC13T21
P0171: Fuel Trim System Lean (Bank 1). this veicle came in for a ses light on codes were the ones mentioned above. this particula engine has a problem with the intake gaskets leaking , and also fuel filters plugging up, causing premature pump failure. filter was replaced initially due to being plug...
March 28, 2006
2000 Jaguar S-Type 4.0L Poor Idle Quality, MIL Lamp on VIN: SAJDA01C7Y
P0171: lean bank 1. HI, CODES P0171,PO174 BOTH BANKS LEAN,HAVE DONE SMOKE TEST NOTHING FOUND,HOWEVER WHEN USING PROPAIN UNDER FRONT OF LOWER INTAKE I GET RICH MIXTURE & SMOOTH IDLE, BEFORE TAKING INTAKE OFF, I SURE WOULD LIKE SOME IMPUT FROM ANY ONE WHO MIGHT HAVE BEEN INTO O...
March 31, 2006
1999 Hyundai Sonata 2.4L Poor Idle Quality, Surge, Cuts out, MIL Lamp on VIN: KMHWF2533X
P0171: Lean Exhaust. Car runs fine when warm. We let car sit outside for several hours, when started, it ran so bad we could hardley get it in garage.
March 03, 2006
1999 Isuzu Rodeo LS 3.2L Poor Idle Quality, Misfire, MIL Lamp on VIN: 4S2CK58W5X
P0171: Fuel System Too Lean (Bank 1). Hello all This vehicle came in today with a steady miss and poor idle. We scanned and showed a miss on #3 cyl. I swapped coils between 1 and 3 cyls and still showed miss #3. Compression was 165# in that hole and plug was replaced while it was out. We can pull ...
March 06, 2006
1999 Ford Escort SE 2.0L MIL Lamp on VIN: 3FAFP15P3X
P0171: Lean Bank 1. ... engine runs well, power is OK but trips code P0171 constantly w/fuel trim readings at + 23 on up. Naturally, checked for intake manifold gasket & all other sources of vacuum leaks including PCV valve, no sign of any. Propane enrichment does drive fuel ...
March 07, 2006
1996 Ford Explorer Eddie Bauer 4.0L Poor Idle Quality, Misfire VIN: 1FMDU34X8T
P0171: bank 1 system too lean. Hi everyone, this truck is giving me a lot of problems. It came in for a check engine light on and rough running all the time. I code scanned the truck and found the codes P017I and P1074, #1 & 2 banks too lean. I also checked fuel pressure and it ranges f...
March 08, 2006
2000 Ford Focus SE 2.0L MIL Lamp on VIN: 1FAFP34P1Y
P0171: Lean Bank 1. ... perpetual P0171 lean exhaust condition. Car runs absolutely flawless w/plenty of pep. At idle LT fuel trim is +31 & short term at +12 trying to push it even higher!!! Days earlier, I had the same symptom on a '99 escort w/same powertrain & fix was ...
March 09, 2006
2000 Volkswagen Beetle GL 2.0L MIL Lamp on VIN: JSH4YIW746
P0171: Bank 1 sytem too lean. hey guys got this beetle that is driving me crazy.Car came in with misfire codes secondary air system codes fixed all of these problems but this car keeps coming back with the above code i am thinking it is the air flow meter.Could some body give the specified...
March 09, 2006
2000 Dodge Grand Caravan SE 3.0L MIL Lamp on VIN: 2B4GP4434Y
P0171: Fuel System Lean (Bank 1). Not sure what to think about this one. Back probed O2 and add propane. Voltage shoots right up to .9+ and exhaust gas shows lambda .8. But the rich/lean pid on modis still reads lean. Just want to make sure I havent missed something before recomend a ECU.
March 13, 2006
1998 Ford Windstar GL 3.8L Poor Idle Quality, Hesitation, Cuts out, Poor Fuel Economy, MIL Lamp on VIN: 2FMZA5148W
P0171: Lean B1. Cust complaint of chk engine light, poor fuel economy. We checked the intake. No sign of excess oil leak. Checked archivewes and found tsb for upper and lower intake. Lower did not appear to have a problem with oil soaking the rubber. Changed the upper gasket ...
March 13, 2006
2001 Land Rover Discovery Series II LE 4.0L No star when cold
P0171: Bank 1 system lean. The car came in the shop with the complain of no start when engine is cold. The engine starts ok if sprayed with starting fluid. I checked for codes and found codes P 0171 and P 0174, both banks running lean. Checked for vacuum leaks and didn't find any leaks....
March 13, 2006
2001 Ford Windstar SEL 3.8L MIL Lamp on VIN: 2FMZA53421
P0171: system too lean bank 1. this is the second van with same issue... other van not repaired yet... manifold tuning valve on both vans had front clips broken... replaced clip on one van and engine light came back on after two day's... same system lean faults... do not want to condem o2 s...
March 14, 2006
2001 Land Rover Discovery Series II LE 4.0L No star when cold
P0171: Bank 1 system lean. The car came in the shop with the complain of no start when engine is cold. The engine starts ok if sprayed with starting fluid. I checked for codes and found codes P 0171 and P 0174, both banks running lean. Checked for vacuum leaks and didn't find any leaks....
March 14, 2006
1999 Pontiac Firebird 3.8L No Start, Poor Idle Quality, Cuts out, MIL Lamp on VIN: 2G2FS22K8X
P0171: Fuel Trim System Lean (Bank 1). ... basics,spark fuel,fuses,etc...service computer stated to hook scan tool and test app sensor 3 for .5-1.3v-no voltage indicated.referred to replace tac module.after replacement same symptoms occur.have tested in detail map,maf and crank sensors all check ok...
March 14, 2006
2000 Ford F-150 4.2L MIL Lamp on VIN: IFTZX1727Y
P0171: system lean b1. ... codes pulled p0171 and p0174. noted small intake leak and repaired. Cleared codes and drove truck. Light comes back on after 20 - 50 miles. Live data looks good on all 4 o2 sensors. I must be over looking something but not sure what.
March 16, 2006
1998 Ford E-150 Econoline 5.4L MIL Lamp on VIN: 1FDRE14L6W
P0171: Lean bank 1. This van came in about 2 months ago with MIL on and no drivability concerns. Scanned codes PO171&PO174, lean both banks. Checked for external vacuum leaks including the PCV hose assembly at rear of intake and found no obvious problems. Both codes were stor...
March 17, 2006
1999 Ford E-250 Econoline 4.2L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1FTPE2424X
P0171: System Too Lean B1. This van has me pulling my hair out. Vehicle came to me after another shop couldn't solve the misfire. Scanned vehicle and initally found misfire codes for cyl 4, 5, and 6 on bank 2. Test drove and noticed engine slightly missing at idle in park and it gets mu...
March 18, 2006
2002 Ford Windstar SE Sport 3.8L Hesitation, Surge, Cuts out, Stall VIN: 2FMZA57412
P0171: Trim System Lean Bank 1. This vehicle is a family friends car. I do not have an access to a scan equipment to give me more accurate readi ngs. Our Nissan Consult will not read the data from Ford vehicle. Original problem with the vehicle was that the motor will idle well but will not ...
March 18, 2006
2000 Ford F-150 4.2L MIL Lamp on VIN: IFTZX1727Y
P0171: system lean b1. ... codes pulled p0171 and p0174. noted small intake leak and repaired. Cleared codes and drove truck. Light comes back on after 20 - 50 miles. Live data looks good on all 4 o2 sensors. I must be over looking something but not sure what.
March 21, 2006
2002 Oldsmobile Bravada 4.2L Poor Idle Quality, Misfire, Poor Fuel Economy, MIL Lamp on VIN: 1GHDT13S42
P0171: Fuel System Lean (Bank 1). We still have a rough idle and code p0171 sets right after codes are cleared and run for 1 minute. The CEL comes on after the engine is shut off and restarted.
March 21, 2006
1999 Volkswagen Jetta GL 2.0L MIL Lamp on VIN: 3VWPA8147X
P0171: system lean. car came in with ceck eng lite on cecked fuel pressure ok cecked for leaks none found cleared codes drove evap code came back po442 car runs ok need help please no vw check equip.
March 21, 2006
2002 Oldsmobile Bravada 4.2L Poor Idle Quality, Misfire, Poor Fuel Economy, MIL Lamp on VIN: 1GHDT13S42
P0171: Fuel System Lean (Bank 1). We still have a rough idle and code p0171 sets right after codes are cleared and run for 1 minute. The CEL comes on after the engine is shut off and restarted.
March 23, 2006
1999 Lexus LS400 4.0L MIL Lamp on VIN: JT88H28F5X
P0171: Fuel System Too Lean (Bank 1). car runs well. no symptoms other than one dtc (po171) lean condition bank one.
March 24, 2006
1999 Chevrolet S10 LS 4.3L MIL Lamp on VIN: 1GCCS19X0X
P0171: Fuel System Lean. ... owned by a local company. They brought truck in for a engine noise which turned out to be a rod knock and a oil pan full of metal. They elected to have a reman. unit installed which we did. Upon road testing the vehicle the ses gave us the p0171 and p0174/...
March 27, 2006
2001 Chevrolet Tahoe 5.3L Poor Idle Quality, MIL Lamp on VIN: 1GNEC13T21
P0171: Fuel Trim System Lean (Bank 1). this veicle came in for a ses light on codes were the ones mentioned above. this particula engine has a problem with the intake gaskets leaking , and also fuel filters plugging up, causing premature pump failure. filter was replaced initially due to being plug...
March 28, 2006
2000 Jaguar S-Type 4.0L Poor Idle Quality, MIL Lamp on VIN: SAJDA01C7Y
P0171: lean bank 1. HI, CODES P0171,PO174 BOTH BANKS LEAN,HAVE DONE SMOKE TEST NOTHING FOUND,HOWEVER WHEN USING PROPAIN UNDER FRONT OF LOWER INTAKE I GET RICH MIXTURE & SMOOTH IDLE, BEFORE TAKING INTAKE OFF, I SURE WOULD LIKE SOME IMPUT FROM ANY ONE WHO MIGHT HAVE BEEN INTO O...
March 31, 2006