Question about 2000 Lincoln Navigator

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SERVICE ENGINE SOON LIGHT ON AND STAY ON

DID AN DIAGNOTIC CHECK IT READ P0174 LEAN (BANK-2) WONDERING WHAT IS WRONG

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  • icornish2 Dec 22, 2008

    donot know its idles kind of rough just like to what p0174 mean and what to do

  • k9otto Dec 26, 2008

    I have the same problem with my 2003 Expedition. I have the exact same code appearing. I tried to clean the MAF sensor as described in another web posting, but that did not work. I also tried to uplug the sensor temporarily to help diagnose, as suggested in a repair manual, but that did not affect the problem either. Any suggestions appreciated.

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My service engine soon light stays on. The vihicle shakes as it idles. It act it wants to shut off. What's the problem

Posted on Dec 22, 2008

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P0171 p0174


P0171 Volkswagen - System too lean bank 1
P0174 Volkswagen - System too lean bank 2
Read more: http://engine-codes.com/p0171_volkswagen.html#ixzz38055IkuR

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Engine light on


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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
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P0171 & P0174 1997 Deville


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Dec 27, 2013 | 1997 Cadillac DeVille

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P0440 bank 2 system lean


To kinda give you an idea where to start, go to this page http://repairpal.com/OBD-II-Code-P0440 let me know what you think after reading this...

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I have a 2001 Jimmy with "Service Engine Soon"


P0171 System too lean bank 1
P0174 System too lean bank 2

Last time you changed your fuel filter?
Look for any vacuum leaks.

Sep 05, 2011 | 2001 GMC Jimmy

1 Answer

Engine check light on error code 1 is P0171 system too lean bank 1 error code 2 is P0174 system too lean bank 2


P0171 system too lean bank 1
P0174 system too lean bank 2
links to information on the codes

it means that the O2 sensors in your vehicle detected a lean condition in their respective banks. this could be caused by a dirty MAF (mass air flow) sensor or a vacuum leak downstream from the MAF sensor

sometimes you can clean the MAF with electronics cleaner or brake cleaner but be sure to take it off the vehicle first. be careful not to damage the MAF while spraying the cleaner, and allow it to dry completely before installing it on the vehicle.

May 21, 2011 | 2001 Jaguar S-Type

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).

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2 Answers

What does error code p0172 and p0174?


P0172 - Fuel Injection System Too Rich Bank 1 Symptoms - Engine Light ON (or Service Engine Soon Warning Light)
- Excessive Fuel Consumption
Possible causes - Intake air leaks
- Front Heated oxygen sensor may be faulty
- Injectors may be faulty
- Exhaust gas leaks
- Incorrect fuel pressure
- Lack of fuel
- Mass air flow sensor may be faulty
- Incorrect PCV hose connec
Possible solution Dirty air filter of faulty air flow sensor are common causes of the problem.



P0174 - Fuel Injection System Too Lean Bank 2 Symptoms - Engine Light ON (or Service Engine Soon Warning Light)
- Excessive Fuel Consumption
Possible causes - Intake air leaks
- Front Heated oxygen sensor may be faulty
- Injectors may be faulty
- Exhaust gas leaks
- Incorrect fuel pressure
- Lack of fuel
- Mass air flow sensor may be faulty
- Incorrect PCV hose connection
Possible solution Dirty air filter of faulty air flow sensor are common causes of the problem. Bottom line possible defective Mass airflow sensor and or O2 sensor in cylinder bank number two.

Feb 21, 2011 | 1998 Ford Expedition

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Service engine soon code p0174


PO174= system too lean Bank 2. Good chance oxygen sensor acting up, may need replacement. If it's 4.6L, that's driver side of engine.

Dec 22, 2009 | 1999 Ford Expedition

1 Answer

2005 hyundai santa fe check engine light on... p0171 and p0174 any ideas to repair it.


Definition of P0171 is Applied to All Manufacturers Powertrain: System Too Lean Bank 1
Definition of P0174 is Applied to All Manufacturers Powertrain: System Too Lean Bank 2

Nov 03, 2009 | 2005 Hyundai Santa Fe

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