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P0171 Diagnostic Trouble Code Discussion for September 2006

Fuel System Lean (Bank 1)


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Trouble Ticket Help Requests for DTC P0171
Help Request Posted
2000 Saab 9-3 2.0L MIL Lamp on VIN: YS3DD58H8Y
P0171: Bank 1 lean. ... come in with check engine light on and code P0171 stored and no others. Have checked for air leaks and have found none. This is the second time light has been on but not sure if this is the same code as used car dealer just cleared them to turn off light. ...
September 01, 2006
2000 Saab 9-3 2.0L MIL Lamp on VIN: YS3DD58H8Y
P0171: Bank 1 lean. ... come in with check engine light on and code P0171 stored and no others. Have checked for air leaks and have found none. This is the second time light has been on but not sure if this is the same code as used car dealer just cleared them to turn off light. ...
September 02, 2006
1998 Pontiac Sunfire SE 2.2L Excessive Emissions, Poor Idle Quality, Poor Fuel Economy VIN: 3G2JB1246W
P0171: Fuel System Lean (Bank 1). Good Day, Folks! While idling in the shop and watching the scan tool data, the injector pulse width intermittantly will jump up to over 8ms, (from around 2.5ms @ normal idle) This occurs WITH NO CHANGE IN ALL OTHER DATA such as MAP, ECT, TPS etc. This naturall...
September 08, 2006
2001 Hyundai Santa Fe GL 2.4L Hesitation, Stall, MIL Lamp on VIN: KM8SB82B01
P0171: Fuel System Too Lean (Bank 1). Engine Idles rough and falls on its face on accell only when it is cold. I have checked fuel Pres. ok the MAF looks ok Coolant temp and intake temp sensor ok O2 sensor switching good after it warms up Runs good EGR works like it should have also check the knoc...
September 11, 2006
2005 Saturn Ion-2 2.2L Hesitation, Stall, MIL Lamp on VIN: 1G8AN12F55
P0171: Fuel System Lean. ... Ecotec which sets a p0171 all the time. Car has 4,000 miles on it. Came from a wholesale car lot full history not known. For some reason they said its not under factory warranty anymore (thats why its here) Original came in with ses light complaint. Ha...
September 11, 2006
2001 Toyota Highlander 3.0L Excessive Emissions, Poor Idle Quality, Misfire, MIL Lamp on VIN: JTEHF21A21
P0171: Fuel System Too Lean (Bank 1). ... highlander came in for cel on and poor idle,scanned for codes and found po171,checked for vacuum leaks and cleaned maf,no change,replaced maf and now have po174 lean condition bank2,p1130 b1s1 perf.malfunction and p1150 b2s1 performance malfunction,vehicle...
September 11, 2006
1996 Ford Windstar GL 3.8L Poor Idle Quality, Hesitation, Stall, Misfire, MIL Lamp on VIN: 2FMDA5141T
P0171: lean on bank 1 - lack of power at cruise intermittent only when warmed up. looking for suggestions as to why cylinder# 6 misfires at hot idle - drops rpm & voltage & shrtftrim goes to a negative ( -4% ) at idle & ( -13% ) at cruise speeds when i also will lose power - intermittent - have to floor it to get moving down the...
September 12, 2006
2003 Ford F-150 XL 5.4L MIL Lamp on VIN: 1FTRW072X3
P0171: lean bank 1. ... trying to land a new fleet account and they have a contract with Enterprize management. Enter prize doesnt believe in valve port cleaning or injector flushes or for that matter transmission services on units with more than 60,000 miles, What?!?!? The deale...
September 13, 2006
2000 GMC Jimmy Diamond Edition 4.3L Excessive Emissions, Poor Idle Quality, Surge, Misfire, MIL Lamp on VIN: 1GKDT13WXY
P0171: Fuel System Lean (Bank 1). Hello all. This Jimmy is trying my patiance. It will start & idle normal for the first 2-3 min then B1 O2 heads towards it comfort zone of 3mv with no movement and ST fuel trim goes to 192. B2 is going a little lean to compensate ST FT 117. B1 is dumping f...
September 13, 2006
1999 Jaguar Vanden Plas 4.0L Hesitation, MIL Lamp on VIN: SAJKD6046X
P0171: lean. i am guessing the fuel pump is bad. i don't want to spend 429.00 if that isn't the problem. any other suggestions or tests i might try. my other thought is the fuel pressure sensor but the guy at the jaguar dealer said he never sold one? any help would be appr...
September 13, 2006
2000 Nissan Sentra GXE 1.8L Poor Idle Quality, Stall, MIL Lamp on VIN: 3N1CB51D2Y
P0171: Fuel Trim Lean. ... start up of the day. Found owner had installed wrong plugs, so replaced. Then found fuel pump weak, and filter stopped up. Car appeared to be fixed. Ran in stall for 1-2 hours, test drove through traffic and highway 4 different times. no problem found. Cus...
September 13, 2006
2002 Saturn Vue 3.0L MIL Lamp on VIN: 5GZCZ63B32
P0171: Fuel Trim System Lean (Bank 1). This Saturn was a drive by scanning with an appointment for next monday. I am writing because this is the first time I have encountered this engine and do not know a lot about it. The customer stated that about 1.5 years ago the pcv hose froze up and caused th...
September 13, 2006
1998 Chevrolet C1500 Cheyenne 5.7L MIL Lamp on VIN: 2GBEC19R4W
P0171: Fuel Trim System Lean (Bank 1). NO VACUUM LEAKS FOUND NO MISFIRE ON MONITOR FREEZE FRAME FOR PO171 SPEED 2 MPH MAP 38 KPA MAF 7.17N gm/sec tps 0% coolant 167 rpm 665 engine load 3%. PO174 2 FAIL COUNTER 44 SPEED 49 MPH RPM 1429 MAF 27.80 gm/sec map 49 kpa coolant 171. i replace the maf senso...
September 14, 2006
1998 Pontiac Sunfire SE 2.2L Excessive Emissions, Poor Idle Quality, Poor Fuel Economy VIN: 3G2JB1246W
P0171: Fuel System Lean (Bank 1). Good Day, Folks! While idling in the shop and watching the scan tool data, the injector pulse width intermittantly will jump up to over 8ms, (from around 2.5ms @ normal idle) This occurs WITH NO CHANGE IN ALL OTHER DATA such as MAP, ECT, TPS etc. This naturall...
September 14, 2006
2001 Ford E-150 Econoline 4.2L MIL Lamp on VIN: 1FTRE14231
P0171: bank 1 lean. evap and cat monitors always incomplete have chaged dpfe still my signal votage never gets above 1.6 volts key on eng off ref voltage 5 volts signal voltage 5 volts I believe my egr system some how is my problem all parts are new also have cleand injectos. I d...
September 17, 2006
2001 Dodge Dakota SLT 3.9L MIL Lamp on VIN: 1B7GG2AX41
P0171: Fuel System Lean (Bank 1). Gentlemen This truck came to my shop for a engine light on and a light miss cond. Found missfire codes, run lean codes. We installed spark plugs and wires. Dist cap and rotor. Pvc valve and air filter. Seemed to run fine. Owner said it ran good for about a we...
September 18, 2006
2001 Nissan Maxima GLE 3.0L MIL Lamp on VIN: JN1CA31A01
P0171: Fuel Trim Lean (Bank 1). Car drives with lean fuel problem. Accelerate and all 4 o2 sensor values drop to 0. Drives like it starves for fuel on heavy accelleration. Replaced pump, pressure regulator on the back side though there is one on the line going into the rail and not sure what...
September 19, 2006
2001 Nissan Sentra GXE 1.8L Poor Idle Quality, Hesitation, MIL Lamp on VIN: 3N1CB51D61
P0171: Fuel Trim Lean. ... first cold start. slight hesitation. p0171 and p0174. o2 sensors seem to be working properly slightly low from lean condition. no apperant vacuum leaks. fuel trim is +115 short term both banks and +125 long term both banks. code set at 56 mph and 2100 rpm....
September 20, 2006
1999 Ford E-250 Econoline 5.4L Poor Idle Quality VIN: 1FTNE242XX
P0171: lean. this vehicle has very bad surge at idle. also has spark knock on acceleration.replaced intake gasket,replaced fuel pressure regulator,downstream [...].no voltage on 02s from scan tool.but has voltage from probing wires.engine runs fine above idle at steady thr...
September 22, 2006
2001 Isuzu Rodeo LS 3.2L Excessive Emissions, Poor Idle Quality, Stall VIN: 4S2DM58W41
P0171: Fuel System Too Lean (Bank 1). Vehicle came to our shop,customer stated that it needed 02 sensors but didn't know which one.Scan test showed codes for both pre 02 sensors;lean and rich.Had problems with scanner;no communicatin.Several attempts changing settings finally retrieved codes.02's ...
September 25, 2006
2001 Nissan Pathfinder LE 3.5L Excessive Emissions, Poor Idle Quality, Hesitation, Surge, Stall, Poor Fuel Economy, MIL Lamp on VIN: JN8DR07Y71
P0171: Fuel Trim Lean (Bank 1). ... this Pathfinder. It came in with a complaint of poor running when cold and ses light on. Runs fine when warm. Code is p0171 bank1 lean. Both o2s are good, reaction time of 36ms, min 0.02v, max 932v. No intake leaks that I can find. fuel press and flow are ...
September 26, 2006