Question about 2001 Ford Windstar

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Engine codes Po171 Po174 Po401

I need to know what these things mean, so i can get my car repaired i cant find anything.

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  • Anonymous Mar 20, 2014

    I would like to know what they mean

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The vast majotity of Ford vehicles with P0171 and P0174 codes are suffering with a vacuum leak. The biggest culprits are the hoses going to the PCV valve. The rubber deteriorates due to heat and oil fumes. Check the hoses and rubber elbows between the PCV valve and the intake manifold. Pay very close attention to the rubber elbows. They crack on the onside and can be hard to spot.

Posted on May 21, 2008

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Posted on Jan 02, 2017

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I have a ford windstar 2001 LX 3.8 i have the codes po401 po171 and po174


171 is a HEGO sensor unable to switch/ 174 is for HEGO sensor also.. 401 is insufficient EGR flow!! egr valve may be clogged or need replaced!!

Feb 26, 2015 | 2001 Ford Windstar

2 Answers

My 2001 mercury sable will not start and has codes PO171 and PO174


The codes mean the fuel system mixture is too lean. The most common cause is low fuel pressure.

Sep 01, 2014 | 2001 Mercury Sable

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

1 Answer

1998 Ford Contour 2.5 litre, 30,000 km. Started cold after sitting for a day in -20C temperature, and idles for little while then quits, and smells like gas. Idle speed fluctuated and surged up and down...


PO171 and P1131 point to lean codes on bank PO174 and P1151 point to lean code on bank PO305 is missfire on cyl 5

the lean codes is probably a vacuum leak or maybe a MAF sensor is bad or dirty

missfire is dependant on engine if a V10 it may be a coil actually pretty likely on the modulars not uncommon thats for sure
sorry forgot to add that its says missfire on #5 cant remember if that one is the first on the left or last on the left facing the engine vacummn leak could be those dang auto hubs got it stuck in the mud and they did not engage I need to buy some new ones took them apart to clean them out this summer

Dec 16, 2013 | 1999 Ford Contour

1 Answer

2003 Ford Expedition check engine light on .Codes PO171 & PO174


This is a tough one could be mass air flow sensor ,oxyegen sensors,a fuel filter. a vacum leak, a pcv valve if i missed anything just google po 171 &174 look for fix ya this issue has been addressed many times first check the vacum lines includeing the line on the pcv valve for cracks or splits in the lines .I would do the fuel filter if it hasnt been changed in the last couple of years , if still a problem the MAF sensor if your happy with my advise please leave me with great feedback

Feb 18, 2013 | 2003 Ford Expedition

1 Answer

2003 Ford Expedition check engine codes PO171 & PO174


You should be replacing all upstream oxygen sensors,
the ones at the inlet or pipe before the converter,on all
your vehicles at 100,000 miles

Go to Rock Auto.Com & buy two & install yourself

NTK 22060 $26.79 ea

Feb 18, 2013 | 2003 Ford Expedition

1 Answer

What do these codes mean po171, po174 po401 my check engine light wont go off i can't get my car inspected


The Code 401 is saying there is no flow to the EGR. The other 2 codes say both sides of the engine are running lean.

You can look for Vacuum diagrams for your model car and get some photos to see routing.

What you might do is use a digital camera and try to find a car in a Salvage yard with the parts you need attached. Photo them and then take the hoses and solenoids off the Salvage car and add them to yours.

This would be the cheapest and most complete way of doing this. Unless you can find a shop willing to install used parts to your car. Now some Body shops routinely use Salvage parts for Bodywork. One may be willing to do a little mechanic work to help you. They do mechanic work to replace broken engine parts from accidents, so working on engines is just part of the job.

Sep 04, 2012 | 1999 Ford Taurus

1 Answer

2003 Mazda MPV diagnostic code 421. Previously had codes PO134, PO131, PO151, PO171, PO174, PO401, & PO121. The hose the air filter and the throttle was broken, and tha engine would not start. I...


Hi


Please check the link to get a detailed idea about the code:-


http://www.obd-codes.com/p0421


Please get back to us if you have further query else please accept the suggestion.
Thank you for contacting fixya.com

Jul 07, 2011 | Mazda MPV Cars & Trucks

3 Answers

Trouble codes PO174,PO401,PO420 NEED TO FIX SO I


P0174 means Fuel Trim too Lean (Bank 2)

P0401 means Exhaust Gas Recirculation Flow Insufficient Detected

P0420 means Catalyst System Efficiency Below Threshold (Bank 1)

Visit http://www.troublecodes.net/OBD2/

and Visit www.repairpal.com

Sep 28, 2009 | 1999 Ford Contour

1 Answer

2006 jeep wrangler code po174


Check wiring to sensors.

Jul 13, 2009 | 2006 Jeep Wrangler

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