P0171 Diagnostic Trouble Code Discussion for August 2016
Fuel System Lean (Bank 1)
Note: This is a professional automotive technician's resource.
Vehicle Owners: If you are seeking an automotive repair professional to service your vehicle, visit the iATN Repair Shop Finder.Trouble Ticket Help Requests for DTC P0171
| Help Request | Posted | |
| 2006 Audi A4 2.0L Poor Fuel Economy VIN: WAUDF78E86 P0171: . Car came in with a P0170 code. idle adaption is 6.5 % at idle should be under .6. Check oil cap a lot of vacume at oil cap, measured vacume at dip stick reading was barely 1hg. Smoked engine, no leaks, replaced vent valve on valve cover and valve cover still n... |
August 02, 2016 | |
| 2005 Pontiac Sunfire 2.2L Running Lean VIN: 3G2JB12F55 P0171: Fuel Trim System Lean. What could cause vehicle to run lean? LTFT at +25%? Smoke tested and no leaks found Fuel Pump and Filter previously replaced At idle there is 40 PSI at the Rail (manual gauge) KOEO Pressure goes up to 30-40 PSI and immediately drops back to 0 |
August 04, 2016 | |
| 2006 Audi A4 2.0L Poor Fuel Economy VIN: WAUDF78E86 P0171: . Car came in with a P0170 code. idle adaption is 6.5 % at idle should be under .6. Check oil cap a lot of vacume at oil cap, measured vacume at dip stick reading was barely 1hg. Smoked engine, no leaks, replaced vent valve on valve cover and valve cover still n... |
August 05, 2016 | |
| 2005 Cadillac DeVille 4.6L MIL Lamp on VIN: 1G6KD54Y25 P0171: Fuel Trim System Lean (Bank 1). Engine seems to run and idle ok. Customer thinks the idle is alittle rougher than she remembers. |
August 10, 2016 | |
| 2002 Toyota Corolla CE 1.8L MIL Lamp on, lean VIN: 1NXBR12E62 P0171: Fuel System Too Lean (Bank 1). ... another mess. The vehicle came to me with a check engine light with a P0171. Drove vehicle found that the calculated load was only going to 70%, easy fix right, replace Mass air flow sensor and had to fix it. WRONG, imagine that. Actually it did fix the ca... |
August 10, 2016 | |
| 2002 Toyota Corolla CE 1.8L MIL Lamp on, lean VIN: 1NXBR12E62 P0171: Fuel System Too Lean (Bank 1). ... another mess. The vehicle came to me with a check engine light with a P0171. Drove vehicle found that the calculated load was only going to 70%, easy fix right, replace Mass air flow sensor and had to fix it. WRONG, imagine that. Actually it did fix the ca... |
August 11, 2016 | |
| 1998 Ford Explorer Eddie Bauer 4.0L Excessive Emissions, Misfire, MIL Lamp on VIN: 1FMZU34EXW P0171: Pending lean code on bank 1. Vehicle came in with blown out thermostat housing replaced the housing sensors, therm etc. Misfires on cyl 1 with flashing mil and cyl 4 misfire as well. Replaced plugs and wires, compression on 1 and 4 is 150-160 still has cat damaging misfire on 1 and # ... |
August 18, 2016 | |
| 1999 Toyota 4Runner SR5 3.4L MIL Lamp on VIN: JT3GN86R3X P0171: Fuel System Too Lean (Bank 1). I scanned the computer. When I found the codes I tested the tps for voltage & it had the correct voltage . I then tested the O2 sensor & it checked out fine both on my scan tool & on my volt meter. My problem is that I don't have a wiring diagram t... |
August 25, 2016 | |
| 2005 Kia Rio 1.6L Poor Idle Quality, Hesitation, Surge, MIL Lamp on VIN: KNADC12585 P0171: Fuel System Too Lean. ... "Felt like it was starving for fuel." Shop owner scanned vehicle globally and found P0170, P0171, P0121 codes, ordered a TPS and passed it on to me. I resc... |
August 30, 2016 | |
| 2009 Hyundai Accent GLS 1.6L long crank hard star VIN: KMHCN46C79 P0171: system too lean. it has an long crank.once started runs fine. no misfires or hesitation or stalling. I replaced spark plugs. ckp sensor has been replaced for stalling on previous visit. any ideas or help would be great thanks. |
August 31, 2016 |
