Question about 1998 Ford F150 Regular Cab

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1998 ford 4.7l runs too lean po1151,po171,whats this mean and how too fix,hesitates when i punch it and back fires

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Could be a bad mass air flow sensor. with the engine off unplug the sensor then test drive with sensor unplugged.(you can do this with almost all the sensors on this vehicle). It will replace the sensor data with a default parameter. If problem persists check fuel pressure.

Posted on Oct 01, 2009

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1 Answer

What does code po1151 mean


that means oxygen sensor bank 2 sensor 1 is running lean, I'll check for vacuum leaks around the intake manifold, if no could be just a faulty oxygen sensor

Apr 16, 2014 | 2000 Mercury Grand Marquis

1 Answer

Po171 po174 code


Lean bank 1 and bank 2 , and throttle actuator system fault. Check reason for lean codes 1st, vacuum leak(s), air inlet boot and hoses, or low fuel pressure / clogged filter. Repair as needed then clear codes and recheck .

Jan 09, 2014 | Cars & Trucks

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I bought a 89 ford bronco it will back fire through the fuel injection when you give it gas but not all the time


sounds like it is running lean. Check engine light on?

You mean backfiring through the intake manifold right?

A tip in hesitation or backfire is usually a lean condition. If you have a MAF sensor, clean the inside exposed wires with carb cleaner. Do no touch.

Mar 06, 2011 | 1989 Ford Bronco

1 Answer

What is code po171 on a 1998 Ford expedition


refers to o2 sensor bank 1 s1 is reading lean check for exh leak vaccume leak egr intake check for misfire


let me know if this helps comment reply if you need more info

Jan 18, 2011 | 1998 Ford Expedition

1 Answer

Po171 and po174 codes shows on my scaner.What do the codes mean.


171 - SYSTEM TOO LEAN BANK ONE.
174 - SYSTEM TOO LEAN BANK TWO.

Dec 16, 2010 | 1998 Ford Explorer

1 Answer

I have a 2000 model expedition and the codes po174 and po171 are popping up, along with po301 and po306 showing misfire. How can I fix that?


P0174/0171 are bank 1-2 running lean (insufficient fuel) which is related to the misfire codes. When there is a misfire detected, the computer shuts fuel to those cylinders triggering "too lean" codes. These vehicles are known for ignition coil failures. I'd recommend you replace all ignition coils (qty of 8) as they do have a short life span. Replace with another brand (not motorcraft/Ford), such as MSD/Accell/BOSH etc. hopefully this helpd!!

Oct 06, 2010 | 1998 Ford Expedition

1 Answer

1998 FORD CONTOUR CHECK ENGINE CODES P1131 AND PO171. REPLACED 1 OF THE OXYGEN SENSORS, CHANGED PLUGS, PLUG WIRES, OIL AND FILTER, ALSO REPLACED AIR FILTER AND CLEANED PCV FILTER, RESET PC AND IT RAN GOOD...


sounds like EGR valve and sensor this controls idle speed when at a stop. the po171 is a burn lean or rich code need to know what bank 1 or 2. also check for a vacuum leak from one of the hoses.

Aug 07, 2010 | 1998 Ford Contour

1 Answer

I have a Ford escort 1998 check engine light is on code is PO171 running to lean bank 1 what do I need to look for please to fix the problem?


It is most likely you E G R valve. They sometimes clog . It is a part of your smog emissions kit. It will hender the reburn of you excess gas fumes and will result in a lean code on your computer. You can buy one to put on yourself for about 50.00 bucks or sometimes you can use a product called seafoam that can be bought a auto-zone and run it through your vacum system and it will clear it up

Nov 10, 2009 | 1998 Ford Expedition

2 Answers

A po171 code came on my scanner i need to know


system too lean in bank 1. clean your mass airflow sensor, replace fuel filter. iff all else fails check you fuel pump.

Nov 06, 2009 | 1998 Ford Contour

2 Answers

What is PO171 on Ford Winstar 97 3.8 liter


That's an 02/oxygen sensor code means that bank 1 or 2 is too lean. Good Luck contact if you need more help.

Dec 29, 2008 | 1998 Ford Windstar

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