Question about 2003 Lincoln Navigator

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Codes P0171, and P0174 bLean on a 98 Navigator. Any ideas?

I have 2 codes that show up on my 98 lincoln navigator 5.4 L, , P0171, and P0174 Lean. Any Thoughts on what these could be, and any chance it could be the EGR stuck closed?

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  • Anonymous Mar 28, 2014

    shaking while starting

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Mass air flow sensor is not the problem, I had the exact same problem and have done much research on this. Check the PVC rubber hoses, especially the elbows for cracks. You probably noticed your gas mileage has been horrible too. Hope this helps

Posted on Sep 16, 2009

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O171 MAF (Mass Airflow Sensor) Just try cleaning this part it usually solves that problem without having to buy new part.

0174 Both are mass air flow sensors. The other problem can be a vacuum leak Check PCV valave and all vacuum lines. Also make sure fuel filter and fuel pump are working correctly. You can clean the MAF with some brake cleaner make sure it is dry before you install it back

Posted on May 28, 2009

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The egr would have to be stuck open to set lean codes. Check the pcv hose assy carefully much more likely

Posted on May 28, 2009

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Mass air flow sensor

Posted on May 28, 2009

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WHAT CAN I DO TO FIX MY AUTO HAVE CODES P0171 P0174 01000 P2195 P2197 WHAT ARE THE CODES.


P0171 & P0174 are lean codes.this can be cause by a vacuum leak. One of the symptoms is a ruff idle when cold.

You can listen for it or you can have it smoke checked by a shop. Most common causes are intake plenum gaskets and rotted PVC hoses.

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2002 Lincoln LS, Enigine has bad miss. Trouble codes are po171b, po174b, po300b, po305b, po306, po420, p1131


Fix the misfire concern on cylinders 5 and 6. That will probably take care of the lean codes p0171 and p0174. The catalytic converter is probably damaged from the misfire concern....that's what is setting the p0420 code. Take care of these concerns first before fixing p1131 code

Jan 15, 2013 | Ford F-450 Cars & Trucks

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2004 x-type 3.0 v6 152,000 miles showed codes P0171, P0174, P2096, P2098, P0101, P0171 pd, P1000.


check for vacuum leaks or a faulty mass air flow sensor. all the codes have to do with engine too lean(too much air).

Jun 09, 2012 | Cars & Trucks

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2000 Lincoln Navigator - few days ago started idling very rough when truck is at a stop or in park. Service Engine Light came right around time I noticed that it was idling rough when stopped. Following...


P1131 Lack of HO2S-11 Switch ,Sensor Lean
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Leaks - in ducting,air filter to throttle
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Apr 06, 2011 | 2003 Lincoln Navigator

2 Answers

Fault code p0174 what is the usually problem with this code


P0174 is System Too Lean Bank 'B'. This will almost certainly be an air leak somewhere in Bank B from where the inlet manifold splits into 2 to feed Bank 'A' and 'B', or possibly a leak in the exhaust manifold / catalyst or where the O2 sensors are fitted into the exhaust. Cleaning the MAF is unlikely to make a difference, as if this is the problem you'll either get a lean code for both banks (P0171 and P0174) or a MAF sensor code (P0101). If the O2 sensor is a fault you'll get an O2 sensor code for Bank B, so don't chance an expensive change of this!
A blocked fuel filter won't only give this code (again it'll affect both banks), ditto the air filter.

As regards to only showing up on highway driving, the leak may only be small and only evident at a higher under bonnet temperature.

Feb 26, 2010 | 2003 Jaguar X-Type

1 Answer

Ford windstar check engine light comes on after stopping when starting to get moving again shows p0171 & p0174 codes why??


P0171 indicates a lean condition. The most common cause of this is a defective mass air flow sensor. Also check if any vacuum leaks. P0174 OBD-II Trouble Code


Technical Description

System Too Lean (Bank 2)


What does that mean?

Basically this means that an oxygen sensor in bank 2 detected a lean condition (too much oxygen in the exhaust.

Note: This DTC is very similar to P0171, and in fact your vehicle may show both codes at the same time.

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Thanks.


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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

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98 Lincoln Navigator Check Eng light on


fuel pump is going out causing the truck to run lean and miss

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