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1998 lincolm navigator trouble code p0171 and p0174 system too lean bank 1 and 2

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You have a vaccum leak

Posted on Jul 01, 2009

  • chris wickware Jul 01, 2009

    you have a vaccum leak

  • chris wickware Jul 01, 2009

    you have a vaccum leak

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Im getting P0171 code- lean .


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Jan 27, 2016 | Cars & Trucks

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DIAGNOSTICS TROUBLE CODES P0171, P0174


System too lean on bank 1 and bank 2

Apr 22, 2014 | 2004 Ford Freestar

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Engine light on


P0171 ; Fuel Trim System Lean (Bank 1)
P0174; Fuel Trim too Lean (Bank 2)
fuel trim is system to modify injector pulse if system go lean it will go rich when the system is too much lean and is max.rich it code
look for 02 sensor bank 1 and 2 data
hope it helps

Mar 31, 2014 | 2003 Chevrolet Malibu

1 Answer

Getting 171 174 on 1997 expedition found fuel filter clogged installed new one vehicle accelerates better but studders while driving


Trouble code P0171 means: Fuel System Too Lean (Cylinder Bank 1)

Trouble code P0174 means: Fuel System Too Lean (Cylinder 2 bank

Mar 15, 2011 | 1997 Ford Expedition

1 Answer

P0171 and P0174 Left and Right bank lean trouble codes pulled from ECU. Check Engine Light illuminated.


P0171 = system too lean bank 1
P0174 = system too lean bank 2

The fuel/air mixture is too lean for the entire engine. The fuel pump pressure could be too low. The fuel pump pressure regulator could be at fault. There could be an air leak downstream of the MAF sensor. MAF sensor (hot wire type) could be dirty. Check for intake manifold vacuum leaks. The engine coolant temp sensor and/or the intake air temp sensor could be faulty (stuck at full hot mode).

Feb 26, 2011 | 2008 Hyundai Entourage

1 Answer

P171 and p174 codes for ford


are the codes p0171 and p0174? p0171 system too lean (bank #1) p0174 system to low ( bank # 2) o2 sensors will go in pairs.

Aug 31, 2010 | 1998 Ford Windstar

2 Answers

P0313;Misfire Detected with low fuel P0171-System too lean{bank1} P0174 System too lean{bank2} drive cycle


P0313 - Misfire Detected with Low Fuel
P0174 -System too Lean (Bank 2).
P0171 -System too Lean (Bank 1).

P0171 and P0174 mean "system too lean" for banks 1

Aug 24, 2010 | 2000 BMW 3 Series

1 Answer

What do these trouble codes mean p0171 and p0174


po171 is system too lean,bank 1,po174,is system too lean,bank 2,It sounds like a fuel pressure problem.

Jan 05, 2010 | 2000 Chevrolet Blazer

1 Answer

Diagnostic code #'s p0174,p0171 system to lean bank 1, system to lean bank 2 help


oxygen sensors are telling you that the mixture is too poor on ur sistem need to check its behaviour and see whats causing that lean mixture
hoope this helps

Nov 10, 2009 | 2001 Lincoln Navigator

2 Answers

Diagonostic trouble codes reported p0171 p0174 p0302 2001 Taurus, only reports P0171


P0171 is system too lean bank 1, P0174 is too lean bank 2, and 302 is misfire bank 1. Look for vacuum leaks. If you don't find them, put a vacuum gage on it can check. The P0171 is almost always a vacuum leak. If not other possibilities are front O2 sensor is too old and should be replaced (if mileage is greater than 100k then replace). Try injector cleaner. Misfires are usually bad spark plugs, but could possibly be caused by insufficient fuel. I've never had a car of mine in bad enough shape to have that error.

Sep 14, 2008 | 2001 Ford Taurus

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