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Nairaland Forum / Nairaland / General / Car Talk / P0171 System Too Lean Bank1 (1028 Views)
P0171 DTC Code. Please Help! Freeze Frame Data Included / Corolla 2010 System Too Lean / Help!!P0171 And P0174 Fix? (2) (3) (4)
P0171 System Too Lean Bank1 by cmoney22222: 7:39am On Dec 24, 2018 |
Great Engineers . Complements of the season. Got a CEL , ran a scan and got the code P0171. System to lean bank1. Pls what’s the possible solution to this. Cc: Gazuz Cc: autologic Cc: all great engineers |
Re: P0171 System Too Lean Bank1 by cmoney22222: 1:51pm On Dec 24, 2018 |
Bump Cc: GAZZUZZ |
Re: P0171 System Too Lean Bank1 by nurey(m): 2:03pm On Dec 24, 2018 |
cmoney22222: it's a universal generic code but you still have to drop car make and model to enable engineers give a logical diagnosis. check your Airflow meter, oxygen sensor bank 1 sensor 1, leak in vacuum lines and exhaust leak. Though if you notice rpm flinctuations and several vibration/stalling when brake is applied try cleaning the Airflow meter first. |
Re: P0171 System Too Lean Bank1 by mayor2013: 2:05pm On Dec 24, 2018 |
Just carry out a tune up exercise |
Re: P0171 System Too Lean Bank1 by cmoney22222: 3:54pm On Dec 24, 2018 |
Toyota Camry 2009 sir. Thanks nurey: |
Re: P0171 System Too Lean Bank1 by nurey(m): 4:26pm On Dec 24, 2018 |
cmoney22222: clean maf, change air filter start from there, clear codes after done and wait whether he go come back. |
Re: P0171 System Too Lean Bank1 by MotorGuru: 6:28am On Dec 25, 2018 |
In layman's terms, this codes implies any of the following: 1. Too little fuel going into the combustion chambers to achieve a stoicometric ratio 2. Too much air( unmetered) going into the combustion chamber to achieve a stoicometric ratio Note that the stoixometrix ratio I am talking about is the quantity of air required to mix a specific quantity of fuel to achieve combustion, which is about14.7 parts of air to 1 part of fuel. Now regarding your case, for point 1 I advise you check your fuel filter condition if it is severely restricted. This can ultimately kill your fuel pump BTW. Dirt in the system can also cause a restriction to your fuel injectors(nozzles). For point 2, since your car uses a MAF, check all hoses and air connections AFTER the MAF. Any unmetered air will have to be compensated for by the ECU by allowing more fuel to be dumped into the combustion chamber, causing fuel trims of over 25%. Your MAF sensor should also be inspected for dirt , as dirt can cause inaccurate reading, causing a false code to be thrown. Finally I would also suggest you check your exhaust system for leaks especially at areas before the air/fuel ratio sensor. Leaks will cause the sensors to throw false error codes too. You can visit my thread:https://www.nairaland.com/4467246/motor-guru-here-ask-questions for more insight. Merry christmas! |
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