P0171 Diagnostic Trouble Code Discussion for April 2004
Fuel System Lean (Bank 1)
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| Help Request | Posted | |
| 1999 Chevrolet C1500 LS 5.7L Surge, MIL Lamp on VIN: 1GECEC19RX P0171: Fuel Trim System Lean (Bank 1). Truck surges under acceleration. Found following codes stored PO171, PO174, PO300. Verified symptoms. Does surge and has loss of power under acceleration. Monitored left and right oxygen sensors - system does go lean and short term fuel trim will rise to +40% ... |
April 01, 2004 | |
| 1997 Nissan Maxima GLE 3.0L Excessive Emissions, MIL Lamp on VIN: JN1CA21DXV P0171: Fuel Trim Lean (Bank 1). this maxima failed CA two speed idle test I have looked at it and found the ecm thinks the engine is running lean and it adding max positive fuel trim I thougt it would be a MAF problem for sure but i disconnected the maf and reset the ecm and it still does th... |
April 01, 2004 | |
| 1999 Ford Contour LX 2.5L MIL Lamp on VIN: 1FAFP66LOX P0171: system too lean bank 1. I'm having a problem solving this one! PO171& PO174 stored in memory.Checked everything according to Alldata and so far the problem re-occurs. Is it possible the intake on this particular vehicle is leaking? I know that Fords have a lot of problems with th... |
April 02, 2004 | |
| 1997 Ford Taurus LX 3.0L Poor Idle Quality, MIL Lamp on VIN: 1FALP53S2V P0171: system lean bank 1. FELLOW TECHS, THIS TAURUS RUNS PRETTY GOOD MOST OF THE TIME, SOMETIMES IT SHAKES A LITTLE ON START UP.MIL LIGHT KEEPS COMING ON AND THE CODES LISTED ARE SET. I'VE CHECKED FOR VACUUM LEAKS WITH A SMOKE MACHINE AND FOUND NONE, EGR VALVE WORKS PROPERLY,(STALLS EN... |
April 06, 2004 | |
| 2000 Nissan Maxima GLE 3.0L MIL Lamp on VIN: JN1CA31A2Y P0171: Fuel Trim Lean (Bank 1). Hello- This is a problem child to the nth degree. This maxima came in for a check engine light late last year. O2 heater went bad and we replaced the sensor. Customer drove car for awhile 10mos. no problems. Customer returned with light on and new code 171. R... |
April 09, 2004 | |
| 1999 Toyota 4Runner Limited 3.4L MIL Lamp on VIN: JT3GN8R2X0 P0171: Fuel System Too Lean (Bank 1). fREEZE FRAME DATA SHOWS: 2103 RPM, ECT @190 F. IAT @ 90 F, STFT @-3.9%, LTFT @ 36% CLOSED LOOP ACHEIVED. I think it is either a clogged filter (fuel) or bad MASS. |
April 14, 2004 | |
| 1995 Ford Mustang 3.8L pings when accelerat VIN: 1FALP4047S P0171: system too lean bank 1. A SHOP FIRST REMOVED HEADS & RTEPLACED GASKETS, THEN THEY REPLACED BOTH HEADS. nOW i HAVE THE CAR. THE EGR VALVE SEEMS TO OPERATE CORRECTLY. WHEN i ENERGIZE THE EGR SOLENOID BY GROUNDING THE BLACK WIRE THE ENGINE WILLL STALL .tHE ECU READS THE TEMP OF ECT ... |
April 15, 2004 | |
| 2000 Ford Contour SE 2.0L Poor Idle Quality, Stall, MIL Lamp on VIN: 1FAFP6639Y P0171: System too lean. ... P0340(cam sensor) as soon as you raise rpm's after clearing codes and P0171(lean) will set after driving a while. All of the other codes have not returned since cleared. When the engine is warm, it will idle poorly and s... |
April 15, 2004 | |
| 1997 Jeep Cherokee Country 4.0L Excessive Emissions, Poor Idle Quality, Misfire, MIL Lamp on VIN: 1J4FJ78S7V P0171: Fuel System Lean (Bank 1). ... code [...] system lean, and resetting adaptive fuel. it will run fine for 3-4 drive cycles then mil comes back on and enine idles rough with black exhaust. engine has all new tune-up components ,fuel press is in spec,exhaust manifold had a crack that i wel... |
April 15, 2004 | |
| 1998 Ford Windstar GL 3.8L MIL Lamp on, hard start VIN: 2FMZA5145W P0171: lean condition bank 1. Hello again. Hoping someone might be able to help out here. We have two problems with the Windstar: one being a lean code for bank 1 and the other being an intermittant "trac off" light coming on. The first we thought that it might be and intake air pr... |
April 19, 2004 | |
| 1998 Ford Windstar GL 3.8L MIL Lamp on, hard start VIN: 2FMZA5145W P0171: lean condition bank 1. Hello again. Hoping someone might be able to help out here. We have two problems with the Windstar: one being a lean code for bank 1 and the other being an intermittant "trac off" light coming on. The first we thought that it might be and intake air pr... |
April 22, 2004 | |
| 1999 Ford E-350 Econoline Club Wagon Chateau 6.8L Poor Idle Quality, Surge, MIL Lamp on VIN: 1FBNE31S4X P0171: Bank 1 System Lean. ... want all to know that our expertise is mostly in Powertrain Systems such as, but not limited to, transmissions, transfer cases, drive axles, etc., although we know a little beyond the fundamentals of driveability issues. Also, this van belongs to one of ou... |
April 26, 2004 | |
| 1997 Honda Accord SE 2.2L Poor Idle Quality, Hesitation VIN: 1HGCD5602V P0171: Fuel System Too Lean (Bank 1). ... poor cold driveability and a CEL on. The symptoms were present and P0171 was stored. We found a Honda TSB referencing these symptoms along with low fuel pressure and high LT trim with a recommendation for a new fuel pressure regulator. The regulator was in... |
April 28, 2004 | |
| 1999 Jaguar XJ8 4.0L MIL Lamp on VIN: SAJHD6036X P0171: lean bank one. ... his Jag to point of engine seizure. Came in on hook with no compression and coolant in three cylinders. Purchased new engine from local Jag Dealer. Installed and had misfire on cylinder #3. Traced to no valve clearance on one of #3 intake valves. Convinced... |
April 29, 2004 |
