P0171 Diagnostic Trouble Code Discussion for January 2004
Fuel System Lean (Bank 1)
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| Help Request | Posted | |
| 1996 Dodge Avenger ES 2.5L MIL Lamp on VIN: 4B38U52NXT P0171: Fuel System Lean (Bank 1). codes p0171 and p0174 return after car driven for short time car runs good but the 02 sensors were lazy so we replaced both upstrem 02 s sensors seem to be switching fine now but codes still set no vacuum leaks found and mechanical condition of engine seems f... |
January 02, 2004 | |
| 2000 Cadillac Catera 3.0L Misfire, MIL Lamp on VIN: W06VR54R8Y P0171: Fuel Trim System Lean (Bank 1). car has code po171 lean condition scaned oxygen sensor bank1 sensor 1 reading over 1000 and when you rev it up and let off of gas three different cylinders show missfire then smooths out are these bad for intake gasket leaks i have never worked on one of these... |
January 03, 2004 | |
| 2000 Nissan Maxima GLE 3.0L MIL Lamp on VIN: JN1CA31D6Y P0171: Fuel Trim Lean (Bank 1). Hello All, This Nissan has had the #4 coil replaced 2 times. Once by us in August and once by a dealer in November when the owner was out of town. The car has returned to us today with the MIL on and the above codes. My question to this great group: is there a... |
January 05, 2004 | |
| 2000 Nissan Maxima GLE 3.0L MIL Lamp on VIN: JN1CA31D6Y P0171: Fuel Trim Lean (Bank 1). Hello All, This Nissan has had the #4 coil replaced 2 times. Once by us in August and once by a dealer in November when the owner was out of town. The car has returned to us today with the MIL on and the above codes. My question to this great group: is there a... |
January 06, 2004 | |
| 2000 Ford Focus SE 2.0L MIL Lamp on VIN: 1FAFP34PXY P0171: System lean. ... possibility of code P0171 and fixed them all, but I'm in trouble here. The MAF on this was definitely out of spec, and has been replaced with a Ford unit, theoretically new and not remanufactured. MAF voltage at idle changed slightly higher to .60volts and... |
January 09, 2004 | |
| 2000 Ford Focus SE 2.0L MIL Lamp on VIN: 1FAFP34PXY P0171: System lean. ... possibility of code P0171 and fixed them all, but I'm in trouble here. The MAF on this was definitely out of spec, and has been replaced with a Ford unit, theoretically new and not remanufactured. MAF voltage at idle changed slightly higher to .60volts and... |
January 13, 2004 | |
| 1999 Ford Windstar LX 3.8L MIL Lamp on VIN: 2FMZA5147X P0171: system lean bank 1. This vehicle came back after two weeks with the same codes.Customer gives no driveability complaint.Long term fuel trim is good except at idle in park (16).Have checked for vacuum leaks using propane but am not having any luck. I have had several of these vehi... |
January 15, 2004 | |
| 1997 Pontiac Sunfire SE 2.2L Poor Idle Quality, Stall, lacks power at times VIN: 1G2JB1245V P0171: Fuel System Lean (Bank 1). ... appriciate any help i can get thank you in advance. Customer came to me from a trans shop because of no power in passing gear. I went for a test drive and the car drove perfect of course. I brought it into the shop and checked plugs and wires installed new... |
January 19, 2004 | |
| 2000 Land Rover Discovery Series II 4.0L MIL Lamp on VIN: SALTY1244Y P0171: Bank 1 Lean. Addaptive Fuel Mixture is maxed out @ 25%. Customer also complains of oil usage. About one quart to 1k miles. It appears someone had the upper intake plenum off at some point. Do these have a problem with intake gaskets leaking into the crankcase? Could I have... |
January 22, 2004 | |
| 1999 Toyota Avalon XL 3.0L Excessive Emissions, Poor Idle Quality, Misfire, MIL Lamp on VIN: 4T1BF22KX9 P0171: Fuel System Too Lean (Bank 1). runs rough cold miss fire detected cyl 1 3 and random miss fire detedted when scaned 1st time . cleaned maf cleared codes and replaced fowled plugs. road test ok. owner called ran ok all day. ran rough cold and light back on. rescaned hade code for bank 1 lean... |
January 26, 2004 | |
| 1999 Ford Windstar LX 3.8L MIL Lamp on VIN: 2FMZA514XX P0171: Bank 1 sensor 2 Lean. Last week we scanned and found 02 sensors stuck in lean position - replaced w/four oem 02 sensors - Two days later light comes back on with codes 171 and 174 lean condition. The 02 sensors (4) test ok. Had this problem with 98 windstar never resolved. |
January 27, 2004 | |
| 1998 Toyota RAV4 2.0L Excessive Emissions, MIL Lamp on VIN: JT3HP10V7W P0171: Fuel System Too Lean (Bank 1). Greetings fellow techs,Looking for a little help with this toyota.I got car from another shop with engine light on and code 171 in ecm.Looking at my scan data I see my o2 sensor reading at a steady 670mv with no change holding rpms to 2500.My post o2 sensor is... |
January 28, 2004 | |
| 1997 Dodge Ram 1500 Laramie 5.2L Excessive Emissions, Poor Fuel Economy VIN: 3B7HF13Z8V P0171: System lean. This truck will start to run poor and according to driver produce very poor fuel aconomy,5-7mpg, after about 50 miles of driving with a trailer in tow. we have not been able to reproduce the syptoms. The freeze frame data at timethe code was set, fuel ad 33% 4... |
January 29, 2004 | |
| 1998 Ford Windstar GL 3.8L MIL Lamp on VIN: 2FMZA5146W P0171: again Bank 1 at system corretion limit Too lean. No complaint of runability at all. Mill light on. o2 sensors all seem active but bank 1 sensor 1 is consitantly below 400mv switches from 90 to 200MV although it does sometimes go rich. Modis trouble shooter mentions TSB 9823-10 which talks about the maf/baro ... |
January 29, 2004 | |
| 1999 Ford Explorer Eddie Bauer 4.0L MIL Lamp on, VIN: 1FMZU34E4X P0171: lean bank. code po171 & po174 intermittent performed flow chart tests with no obvious defects |
January 29, 2004 | |
| 1998 Mercury Mystique LS 2.5L MIL Lamp on VIN: 1MEFM66L7W P0171: system too lean bank 1. rec'd from used car dealer. has been to other shops. fuel filter,all o2 sensors,coolant sensor,spark plugs and wires replaced. we have seen these codes on other tech help requests. does ford have a pattern failure problem that sets po171 and po174? we have a 2... |
January 29, 2004 | |
| 1998 Toyota RAV4 2.0L Excessive Emissions, MIL Lamp on VIN: JT3HP10V7W P0171: Fuel System Too Lean (Bank 1). Greetings fellow techs,Looking for a little help with this toyota.I got car from another shop with engine light on and code 171 in ecm.Looking at my scan data I see my o2 sensor reading at a steady 670mv with no change holding rpms to 2500.My post o2 sensor is... |
January 29, 2004 | |
| 1996 Dodge Dakota 3.9L MIL Lamp on VIN: 1B7GG26X5T P0171: Fuel System Lean (Bank 1). This Dakota has been back three times in the last month. Always with the check engine light back on and a code po171. This truck runs fine with no hesitation, surge or miss. starts and idles fine. Customer has no complaint about performance, just wants the CEL... |
January 30, 2004 |
