2001 Ford Taurus shows PO171&PO174


	Auto Repair Home	SEARCH POSTS	WHO'S ONLINE	LOG IN

Automotive Repair

Car Troubleshooting Topics
  Car Troubleshooting
  Engine Troubleshooting
  Engine Fault Codes
  Electrical and Wiring
  Transmission Problems

Car Repair Topics
  Car Making Noises
  Car Stereo Repair
  Heating or AC Issues
  Motorcycles and ATVs
  Tricks of the Trade
  Truck Repair Advice

Site Options:
  Login
  Sign up here!

Latest Forum Post

1989 toyota pickup 3.0 crank no start

I have a 1989 toyota pickup 3.0 crank no...

Strut spring orientation and strut mount tension nut

2017 Nissan rogue awd 2.5 L Put in Monro...

Transmission stuck in part, I have tried everything

So I'm working on my elderly fathers 201...

2017 dodge journey LED headlights on/off randomly

Year of vehicle 2017 Make of vehicle dod...

Kia Soul starter replacement issues!

Okay so my car is a 2010 Kia soul 2.0 en...

Please Help - Knock sound & engine fail

Hi all, Hoping to get some insight and ...

multiple warning lights

2013 GMC Terrain 130,000 miles 4 cylinde...

03 alero no low speed blower

Good day everyone, I have a 2003 Olds a...

04 Chevy 2500hd tail light issues

Help!!! I have changed my combo switch...

1999 Grand Caravan Sport not starting.

Hi. I'm new here. I hope someone can hel...

2001 Ford Taurus shows PO171&PO174

Sign up here!

Search for (search options)

Auto Repair Home>> Automotive Repair>> Car Troubleshooting

Guest
Anonymous Poster
snoe2006@yahoo.com

Jul 22, 2009, 2:30 AM

Post #1 of 3 (3506 views)

2001 Ford Taurus shows PO171&PO174	Sign In

Hi all, this is a 2001 Ford Taurus with overhead valve engine. I recently ran some fuel injector cleaner with fill up. The car runs really rough now stumbling and hesitating while idling. The two codes came up PO171&PO174. I took out Mass Airflow Sensor, cleaned it put it back in, and it is still stumbling. Does it just have to run its course or will I need to look further at something? Thank you for any help

Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Jul 22, 2009, 3:48 AM

Post #2 of 3 (3503 views)

Re: 2001 Ford Taurus shows PO171&PO174	Sign In

I see the combination of those 2 codes on Fords quite often and it is almost always caused by a bad vacuum leak. Check all the rubber connectors at the manifold, especially the ones feeding the PCV line or brake booster. The rubber elbows tend to suck a hole in while running and close up when shut off so listen for a hissing noise and follow it.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.

Guest
Anonymous Poster
snoe2006@yahoo.com

Jul 22, 2009, 5:08 AM

Post #3 of 3 (3498 views)

Re: 2001 Ford Taurus shows PO171&PO174	Sign In

Thank you for responding so quickly. Early, I did have the hood up and was able to hear the hissing and it came from a hole in the pcv hose. I replaced the hose and valve together and is running fine

Search for (options) Privacy Sitemap