P0171 Diagnostic Trouble Code Discussion for September 2016
Fuel System Lean (Bank 1)
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| Help Request | Posted | |
| 2005 Ford F-150 FX4 5.4L Poor Idle Quality, Hesitation, Surge, MIL Lamp on VIN: 1FTPW14525 P0171: lean bank 1. truck came in with MIL on, little surge, hesitation, just all-round running rough. Scan the truck and found lean codes for both banks, preformed a intake smoke test it pass with no leaks found. Found fuel pressure ok but for a view dollars I put in a new filte... |
September 06, 2016 | |
| 2000 Ford F-250 Super Duty Lariat 5.4L MIL Lamp on VIN: 3FTNX20L9Y this truck came in with codes p0171 and p0174 for banks 1 and 2 lean and when at wot has a major loss of power. I have checked fuel pressure ( 30 idle and rises to almost 40 under acceleration) removed both upstream o2 sensors to check for restricted exhaust w... |
September 07, 2016 | |
| 1997 Chevrolet K2500 Cheyenne 5.7L Poor Idle Quality, Cuts out, MIL Lamp on VIN: 1GCGK29R9V P0171: Fuel Trim System Lean (Bank 1). ... & P0174. Customer replaced PCV valve. Fuel pressure was at 53 psi, mitchell calls for 60-66 psi. B1 short fuel trim was 0%, B2 short fuel trim was +20%, B1 long fuel trim was +16%, B2 long fuel trim was +25%, at idle. We replaced fuel pump and fuel fil... |
September 08, 2016 | |
| 2000 Ford F-250 Super Duty Lariat 5.4L MIL Lamp on VIN: 3FTNX20L9Y this truck came in with codes p0171 and p0174 for banks 1 and 2 lean and when at wot has a major loss of power. I have checked fuel pressure ( 30 idle and rises to almost 40 under acceleration) removed both upstream o2 sensors to check for restricted exhaust w... |
September 12, 2016 | |
| 2003 Ford E-450 Super Duty Custom 6.8L Poor Idle Quality, Surge VIN: 1FDXE45S53 P0171: System Too Lean Bank 1. We have this van that runs very poorly. All indications are lean condition. As stated I originally noticed the intake hose off the throttle body. Reconnected the hose. Engine still runs lean. What really puzzles me is if I unbolt the air filter housing at the ... |
September 16, 2016 | |
| 2002 BMW 325Ci 2.5L Poor Idle Quality, Hesitation, Stall, Misfire, MIL Lamp on VIN: WBABS33452 P0171: Bank 1 Lean. We have a BMW 325Ci that persistently is running lean. Fuel trims peg at 27%+ when it tries to run in closed loop, and at times it will set misfire faults on some/most cylinders. Engine responds well to added fuel and the O2s switch from lean to rich, so I kno... |
September 20, 2016 | |
| 2006 Ford Five Hundred SEL 3.0L Hesitation, MIL Lamp on VIN: 1FAHP27166 P0171: system too lean bank one. ... The original codes were U1900 ABS, U0101 and P1000. The starter relay did not ground through the PCM. We attached a ground wire to the starter relay. Car started We also found that the drive shaft was loose. The transmissio... |
September 21, 2016 | |
| 2002 Lexus ES300 3.0L Hesitation VIN: JTHBF30G92 P0171: Fuel System Too Lean (Bank 1). Hello fellow Techs, I got one that is kicking my a**. Car came in with misfires on bank 1 & fuel system too lean, catalyst efficiency codes on both banks. Vehicle hesitates under load & Bank 1 A/F ratio sensor reads 4.99V at WOT under load. Bank 2 sens... |
September 24, 2016 | |
| 2012 Chevrolet Malibu LT 2.4L No Start VIN: 1G1ZD5EU9C P0171: System Too Lean Bank 1. ... HOPEFULLY HELP OTHERS OUT THERE FACING THIS SAME PROBLEM*** SYMPTOMS: Crank no start. P0171. No fuel pressure. ITEMS REPLACED: Fuel pump assembly THE STORY: Vehicle originally came to us with a complaint of being dead. Found the batter defective and rep... |
September 28, 2016 | |
| 2008 Dodge Durango SXT 4.7L Poor Idle Quality, Surge, Stall VIN: 1D8HB38N08 P0171: sytem to lean Bank 1. This vehicle will not staying running on a cold start(after about 6-8 hour soak). Vehicle will set lean codes for both banks during this time. Once vehicle is warm it will run perfectly. We have run the Chrysler top end clean threw the intake, and replaced all... |
September 28, 2016 | |
| 2006 Ford Five Hundred SEL 3.0L Hesitation, MIL Lamp on VIN: 1FAHP27166 P0171: system too lean bank one. ... The original codes were U1900 ABS, U0101 and P1000. The starter relay did not ground through the PCM. We attached a ground wire to the starter relay. Car started We also found that the drive shaft was loose. The transmissio... |
September 28, 2016 | |
| 2005 Volkswagen Jetta GLS 2.0L Excessive Emissions, MIL Lamp on VIN: 3VWSA69M65 P0171: Fuel trim lean - Bank 1. At this time, this one is getting frustrating. Customers complaint is CEL and intermittent clouds of smoke upon startup. Today was the first time since the car has been here that we have gotten the cloud on startup, and it smelled of raw fuel. While monitoring... |
September 29, 2016 |
