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P0171 Diagnostic Trouble Code Discussion for November 2008

Fuel System Lean (Bank 1)


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Trouble Ticket Help Requests for DTC P0171
Help Request Posted
2003 Mitsubishi Eclipse GS 2.4L Excessive Emissions, MIL Lamp on VIN: 4A3AC44G23
P0171: Fuel System Lean (Bank 1). I have a Mitsubishi that sets a P0171 lean exhaust code after driving for about half an hour. I have checked the fuel pressure while running the engine and ther is no change hot or cold. I replace the Bank 1 sensor 1 O2 sensor. I pinched off the fuel pressure ...
November 01, 2008
1999 Chevrolet Malibu 3.1L Cuts out, 17inch,vac-22iac mot VIN: 1G1ND52J7X
P0171: Fuel System Lean. thank you all up front! i have three concerns. most troubling,any time gas is added the car stalls after the added gas(it had 3/4 tank of gas already,i added5.00- not even 2gals.)it stalled when restarting the car.again i did have a purge during non-command co...
November 04, 2008
1998 Toyota Avalon XL 3.0L Excessive Emissions, Poor Idle Quality, Hesitation, Misfire, MIL Lamp on
P0171: Fuel System Too Lean (Bank 1). hi all, car came in with codes for random misfires and on 1,3,5, cyls. also lean bank 1. it has a/f sensors.the plugs on bank 1 were fouled,rich, bank 2 plugs ok. replaced maf with new oe sensor,and plugs on bank 1 . hard reset computer. test drove good. custo...
November 04, 2008
2000 BMW 740iL 4.4L Cuts out, Poor Fuel Economy VIN: WBAGH8346Y
P0171: system lean b1. We don't work on alot of European models, the vehicle cuts out on hard accel with no other driveability problems. I have scanned it, checked for crankcase vacuum with a snap on vac pump, and was ok, checked fuel pressure and stays above 50psi. The MAF reading,...
November 05, 2008
1998 Toyota Avalon XL 3.0L Excessive Emissions, Poor Idle Quality, Hesitation, Misfire, MIL Lamp on
P0171: Fuel System Too Lean (Bank 1). hi all, car came in with codes for random misfires and on 1,3,5, cyls. also lean bank 1. it has a/f sensors.the plugs on bank 1 were fouled,rich, bank 2 plugs ok. replaced maf with new oe sensor,and plugs on bank 1 . hard reset computer. test drove good. custo...
November 05, 2008
1999 Chevrolet Malibu 3.1L Cuts out, 17inch,vac-22iac mot VIN: 1G1ND52J7X
P0171: Fuel System Lean. thank you all up front! i have three concerns. most troubling,any time gas is added the car stalls after the added gas(it had 3/4 tank of gas already,i added5.00- not even 2gals.)it stalled when restarting the car.again i did have a purge during non-command co...
November 07, 2008
2006 Chevrolet Trailblazer LT 4.2L MIL Lamp on VIN: 1GNET16S36
P0171: Fuel System Lean (Bank 1). ... lean. It came in 2 days ago with engine light flashing (code p0304-misfire cyl. 4) putting a new coil and plug in cly. 4 took care of that. came back next day with engine light on (p0171-system lean bank 1), the short term trim numders are around 0 when dr...
November 07, 2008
2000 Toyota Celica GT 1.8L MIL Lamp on VIN: JTDDR32T1Y
P0171: Fuel System Too Lean (Bank 1). thank you fellas in advance. this car has a lean code that we cannot figure out. we all know about maf sensors on these, and was replaced 13 months ago for this code(fixed) and was replaced again during this diagnosis with a marginal improvement in trims(both ...
November 11, 2008
2000 Toyota Previa V6 3000CC MIL Lamp on, Pinking/ Detonation VIN: MCR30W-000
P0171: Lean Abnormal Bank1. Hi all, this vehicle pinks/detonates under light to moderate load intermittently when hot, the MIL light comes on after a few minutes of the conditioon occuring and stores the lean abnormal bank 1 code, I've checked all intake hoses etc for air leaks and no pr...
November 17, 2008
2003 BMW 330i 3.0L MIL Lamp on VIN: WBAEV53443
P0171: adaptation to limit mixture too lean bank 2. This car has the service engine soon light on with codes PO174 fuel mixture to lean limit bank 1 and code PO171 fuel mixture to lean limit bank 2. We have performed a fuel pressure test, checked for vacuum leaks, performed a smoke test to verify air leaks, all...
November 18, 2008
2006 Chevrolet Tahoe Z71 5.3L Excessive Emissions, Poor Idle Quality, Hesitation, Surge, Stall, Misfire, Poor Fuel Economy, MIL Lamp on VIN: 1GNEC13Z26
P0171: Fuel Trim System Lean (Bank 1). Concern is intermitant. When it occurs, engine develops a bad miss and misfires are indicated on Cyls. 1,3,5,7 in decreasing numerical order respectively. (5465,545,394,296) Injector pulse width at normal idle B1=3.57 mS, B2=3.49 mS. IPW when misfiring B1=5.63...
November 18, 2008
1999 Lexus RX300 3.0L Excessive Emissions, Poor Fuel Economy, MIL Lamp on VIN: JT6HF1OU3X
P0171: Fuel system too lean bank 1. ... that I cannot figure out. P0171 keeps coming back within 4 drive cycles and the SUV misfires going down the highway (presumably misfiring due to rich condition). I have replaced the mass air from other suggestions in fix database. Fuel pressure is alright ...
November 18, 2008
2001 Hyundai Santa Fe GL 2.4L Cuts out VIN: KM8SB82B71
P0171: Fuel System Too Lean (Bank 1). maf readings a bit high 1.5v@ idle and 2v@ 2000rpm, smoke test performed ok, higher than normal fuel press??? also ck'd timing belt and marks ok. this engine seems to have vibration feels like balace shaft issue??? cust says stall w/cold ok after warm up, has ...
November 21, 2008
2000 Jaguar XJ8 4.0L Misfire, MIL Lamp on VIN: SAJDA14C8Y
P0171: bank 1 lean. Jaguar techs please help!!! Vehicle runs horribly rough & lacks power. Here's what we know so far: -Compression test shows Left bank (drivers) all cylinders approx 30 psi lower than right bank (Right all cyl approx 140 psi Left all cyl approx 110 psi)**No ...
November 24, 2008
2004 Ford Focus ZX3 2.3L MIL Lamp on VIN: 3FAFP31Z84
P0171: Lean Exhaust. This Focus is lean and setting P0171 Lean Exhaust. Engine runs OK, has smooth idle. At idle MAF is 3 grams sec (.78v), +11% LT fuel trim. At 3,000 RPM no load MAF is 8 grams sec (1.4v), +26% LT fuel trim. Did a smoke test and found no vacuum leaks. Fuel pressu...
November 30, 2008