Question about 2003 Lincoln Navigator

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I got the codes from auto zone 4 codes came up p1151,p0171,p0174,p1131 all of the codes listed several possibilties and the MAF was listed on them all does the mass air flow censor cause this

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  • elliott4517 May 18, 2009

    help please

  • Anonymous Mar 28, 2014

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  • Master
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It could but most likely not check for a vacuum leak check the hoses to the throttlebody the rubber fittings have a tendancy to get soft and collapse

Posted on May 23, 2009

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Chevy Silverado error p1151


P1151 Lack of Upstream Heated Oxygen Sensor Switch - Sensor Indicates Lean - Bank No. 2


p1131 p1151 p0171 p0174 p1131 p1151 p0171 p0174
All of these p1131 p1151 p0171 p0174 codes indicate a problem with a lean condition. This engine is known for vacuum leaks, so before you start throwing oxygen sensors at the problem, it pays to perform some diagnostics.
Start by cleaning the MAF sensor. Spray the sensor with CRC MAF sensor cleaner. Next, check the plastic vacuum lines, especially where they meet with rubber boots. If they are cracked or the rubber is swollen, replace the line. Then check the rubber elbow that holds the PCV valve. That elbow is a know failure point. In fact, the entire PCV tubing is a trouble spot on these engines. (thanks Ford).
After you've checked for vacuum leaks, check the operation of the oxygen sensors. The easiest way to do that is to disconnect the sensor from the harness. Connect one lead of your digital voltmeter to the black wire on the sensor and the other lead to battery negative. Then start the engine and add fuel (either propane, starting fluid, or carb cleaner) into the throttle body to force the mixture to rich. You should see a corresponding increase in voltage as you add fuel (from 0 volts to slightly less than 1 volt). Start and stop the fuel enrichment and watch the meter to see if the volts drop as you stop adding fuel. If you see no change, the sensor is dead. Replace it.
You can also use the fuel enrichment procedure to locate intake gasket leaks.
P1131 Lack of Upstream Heated Oxygen Sensor Switch - Sensor Indicates Lean - Bank No. 1
P1151P1151 Lack of Upstream Heated Oxygen Sensor Switch - Sensor Indicates Lean - Bank No. 2
P0174 system lean bank 2
P0171 system lean bank 1


This is the only info that didn't come back directly to FORD (yet still mentions it) instead of GM. Not to sure you got the correct code.

Jul 08, 2014 | 1999 Chevrolet Silverado 1500

1 Answer

GOT POCKET SCAN, RESULTS CODES ARE P1131,P1151,P0171,P0174,P1174


Put OBD2 Codes followed by the number into google

You can read all day long

Then study obd2 systems

Codes do not tell you what is wrong
& never to replace anything

Codes are used with diagnostic factory
manuals & trouble charts to COMPONENT
TEST never replace a thing until they fail a test
& you find a system fault

Nov 15, 2012 | Cars & Trucks

1 Answer

Got codes , p1131,p1151,p0171,p0174,p1174


Autozone and some other auto part stores will scan for free and tell you what all the codes are/mean.

Nov 15, 2012 | 1997 Lincoln Town Car

1 Answer

Ford windstar trouble codes p0171-p0174- p1131-p1151-p0305


All these are fuel trim codes and fuel control O2 sensor related codes, you have something that is causing this as all the sensors seldom fail. My advice here is to see a Ford dealer for the diagnostics before any parts are replaced.

Jun 27, 2012 | 2001 Ford Windstar

2 Answers

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
P1151-Lack of HO2S-21 Switch ,Sensor Lean
PO171- System to Lean (Bank 1)
PO174-Systen to Lean (Bank 2)

Fuel Filter -Plugged
Low Fuel Pressure
Evap System -Leaks
Leaks - in ducting,air filter to throttle
PCV -Leaks
Exhaust System -Leaks
O2 Sensors-worn out

Apr 06, 2011 | 2003 Lincoln Navigator

2 Answers

Service engine soon light on - codes P0171, P0174, P1131 and P1151 on a 2002 4.6L V8 Does this combination of codes focus on a particular emission component?


Hi, 1151 is an 02 sensor code, 1131 is also 02 sensor code,
0174 lean condition bank 2, and 0171 is lean bank 1. Either this is in need of a whosale of repairs or you have computer issues, From looking at the codes i would first do a complete tune up, Including wires, And inspect for a vacume leak before replacing any 02 sensors..
Take care

Aug 07, 2010 | 2002 Ford Explorer

1 Answer

Poor idle dtc P1151, P1131,P0174, P0171. runs ok


Change plugs, and Mass Air Flow sensor. This should do the trick

Nov 29, 2009 | 2003 Ford Taurus

2 Answers

Codes p1131,p1151,p0171,p0174,p0304 . truck runs rough &will not rpm out. missing gets worse the longer you drive. but if i kill the engine then restart the problem gets better.


All are fuel related , as in running lean. I'd start by checking all vacuum lines for possible leak, then buy some spray cleaner for MAF sensor & give it a good spray or tuner spray from TV repair place or radio shack, is even better. Ford says not to (they'd rather sell new part) but it will work at least long enough to see if that's the problem before you replace a bunch of parts.

Aug 08, 2009 | 2000 Ford F250 Super Duty Crew Cabs

2 Answers

98 E-250 Rough Idle; codes p0156,p1131,p1151,p0301,p0171,p0174+


po301 thru po306 all misfire codes cylinder 1-6 remove plugs and replace them..... set the plug gap first
i suggest u replace the wires also if they never been replaced all these misfire codes can set the others and one is for the oxygen sensor ( 02s or HO2S) CIRCUT MALFUNCTION do u know how to check wireing systems
do the tune up plugs (set gap) .052-.056 change the fuel filter also. clear the codes hows it run
this info is for 98 E-250 4.2Litre
what engine do u have 4.2L or 4.6L i know it is a v-6 by the codes

Dec 15, 2008 | 2003 Ford E250

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