P0171 Diagnostic Trouble Code Discussion for February 2018
Fuel System Lean (Bank 1)
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| Help Request | Posted | |
| 2002 Ford F-150 King Ranch 5.4L Surge VIN: 1FTRX18L22 P0171: system lean. Good day all. this 5.4 runs and idles great. if allowed to idle after a while the idle will dip down and recover. customer states it will sometimes die at a light. this i have not duplicated..it may idle 10 min or longer before it does it for me.. thanks f... |
February 06, 2018 | |
| 2010 Mazda 3 i 2.0L MIL Lamp on VIN: JM1BL1SG2A P0171: . ... pressure which is in specification 58 to 62 . no vacuum leaks at intake or pcv or the exhaust.ive got negative voltage from bank 1 sensor 1 Af ratio sensor reading at -0.482 key on engine off and -0.125 to -0.255 key on engine running bank one sensor ... |
February 06, 2018 | |
| 2005 Subaru Outback i 2.5L MIL Lamp on VIN: 4S4BP61C85 P0171: Fuel System Too Lean (Bank 1). this car came in and the MAF was way off on grams per seconds. the customer installed a cheap after market MAF sensor off the internet along with a A/F sensor. The AF sensor reads .98-1.00 volts all of the timegoing down the road or at idle. One of our tec... |
February 07, 2018 | |
| 2003 Subaru Forester XS 2.5L MIL Lamp on VIN: JF1SG65683 P0171: Fuel System Too Lean (Bank 1). found fuel pressure at 22 psi and goes up when hose is pulled off 32psi replace fuel pump the samething is there something Iam missing here |
February 13, 2018 | |
| 2005 BMW X3 2.5i 2.5L MIL Lamp on VIN: WBXPA73475 P0171: Lean Bank 1. ... P0171 and P0174 both banks running lean. We checked the intake boot and found several cracks. We sprayed carb cleaner and watched the trims go from + to -. After replacing the boot the total fuel trims were still indicating a lean condition. So now I ... |
February 14, 2018 | |
| 1997 Nissan Quest GXE 3.0L MIL Lamp on, MIL Lamp on VIN: 4N2DN1115V P0171: Fuel Trim Lean (Bank 1). Vehicle stuck lean P0171 code, runs ok thanks for your help. |
February 14, 2018 | |
| 2003 Subaru Forester XS 2.5L MIL Lamp on VIN: JF1SG65683 P0171: Fuel System Too Lean (Bank 1). found fuel pressure at 22 psi and goes up when hose is pulled off 32psi replace fuel pump the samething is there something Iam missing here |
February 14, 2018 | |
| 2003 Subaru Forester XS 2.5L MIL Lamp on VIN: JF1SG65683 P0171: Fuel System Too Lean (Bank 1). no intake leaks or exhaust leaks replace fuel pump,regulator,filter. replace afs and downstream o2 sensor check wires from afs connector to pcm all good (there is no flash for this car have the j2534 disc from subaru)also the injectors are good fuel pressu... |
February 14, 2018 | |
| 2006 Chevrolet Trailblazer LT 4.2L aborts evap test VIN: 1GNDT13S76 P0171: Fuel System Lean (Bank 1). hey guys, this 2006 Trailbazer is giving me a headache, customer brought it in for it's annual state inspection, I had to fix the secondary air system , put a vent valve in it. it had an intermittent misfire and lean code...O2's ok , after some testing, I ... |
February 15, 2018 | |
| 2003 Subaru Forester XS 2.5L MIL Lamp on VIN: JF1SG65683 P0171: Fuel System Too Lean (Bank 1). no intake leaks or exhaust leaks replace fuel pump,regulator,filter. replace afs and downstream o2 sensor check wires from afs connector to pcm all good (there is no flash for this car have the j2534 disc from subaru)also the injectors are good fuel pressu... |
February 15, 2018 | |
| 2014 Mitsubishi Outlander Sport ES 2.0L MIL Lamp on VIN: 4A4AP3AU3E P0171: system lean. Code p0171 for system lean, inspected exhaust for leaks none found at this time, used outside fuel source to look for vacuum leaks. Found the intake boot from throttle body to air box loose and the hose from the valve cover to the intake boot to be loose. ... |
February 26, 2018 |
