P0171 Diagnostic Trouble Code Discussion for October 2018
Fuel System Lean (Bank 1)
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| Help Request | Posted | |
| 2016 GMC Canyon 3.6L MIL Lamp on VIN: 1GTH6CE32G P0171: Lean b1. Vehicle came in with multiple codes including lean for both banks, lean for all 02 sensors, and a flow during non purge code. Assumed i had it diagnosd without even opening hood, went straight for leaking purge valve, but that was not the case. Long term f... |
October 03, 2018 | |
| 2008 Toyota Sienna CE 3.5L Surge VIN: 5TDBK29C88 P0171: too lean bank 1. this sienna came whit 2 code 171 and 174 (long time fuel trim at 30%) and it surge and hesitate at 70kmh cleaned maf and check for vacuum leak and found nothing .take fuel pressure and at idle am at 25 lbs and the pump do not reatch more than 40 lbs i let ... |
October 03, 2018 | |
| 2005 Nissan Xterra Off-Road 4.0L Poor Idle Quality VIN: 5N1AN08W75 P0171: Fuel Trim Lean (Bank 1). At idle the car runs very lean. Total fuel trim/Lambda at idle is 135% both banks. The air fuel ratio sensors are both reading above 1.5 V and both air fuel ratio sensors have very similar waveforms. Both rear sensors are simple oxygen sensors and both are... |
October 10, 2018 | |
| 2005 Nissan Xterra Off-Road 4.0L Poor Idle Quality VIN: 5N1AN08W75 P0171: Fuel Trim Lean (Bank 1). At idle the car runs very lean. Total fuel trim/Lambda at idle is 135% both banks. The air fuel ratio sensors are both reading above 1.5 V and both air fuel ratio sensors have very similar waveforms. Both rear sensors are simple oxygen sensors and both are... |
October 11, 2018 | |
| 2009 Volkswagen Passat Komfort 2.0L MIL Lamp on VIN: WVWJK73C69 P0171: system to lean. Car sets above codes,we replaced pcv system and fuel psi sensor,tested regulator on high pressure pump and it is ok,replaced pcv valve on vc due to failing a lamda control test block 107 in basic settings on vag com,passes that test now so Im confident I n... |
October 11, 2018 | |
| 2014 Ford Escape Titanium 2.0L MIL Lamp on VIN: 1FMCU9J93E P0171: Bank 1 lean. hello iatn! i have a p0171 that has me stumped. Combined ft stays +25 to +30 at any load or throttle opening. Smoked intake and all turbo ductwork, no leak found. Pcv system functions properly, no vacuum in crankcacse. Map- @ idle 5psi @wot 30psi boos... |
October 18, 2018 | |
| 2005 Mercedes-Benz C320 3.2L MIL Lamp on VIN: WDBRN64J75 P0171: System lean bank one. We have an odd one here and hoping a benz tech can shed some light. Fuel trims -35 rich both banks. Resetting fuel adaptions causes the front 02 sensors to peg at over 800 mv and short term trims go to -25 then long term trims after that go -20 -25. Normal... |
October 18, 2018 |
