2001 Taurus - P0171 & P0174 - Taurus Car Club of America : Ford Taurus Forum
 5Likes
Reply
 
LinkBack Thread Tools
post #1 of 13 (permalink) Old 04-30-2019, 08:43 AM Thread Starter
Member
 
Join Date: Jan 2012
Location: Sanford, North Carolina
Chapter: Southeast
Year: 2001
Model: Ford Taurus
Engine: 3.0L 24v Duratec V6
Posts: 151
Rep Power: 16
 
Trader Score: 0 reviews
2001 Taurus - P0171 & P0174

Hello All;

OK.
I changed out the Coil Pack on our 2001 Ford Taurus (DOHC)
Cleared the codes, ran the car for about 100-miles.
And all of a sudden, it started to act up again.
The codes are:
P0171 & P0174
Banks 1 & 2 - Too Lean

I have checked for air leaks, and cannot find any.
I cleaned the MAF Sensor and that seemed to have helped.
So I cleared the codes again, and the two codes above are back again.

Any information on what to check next, or replace, would be great.

Thanks.
Wayne
carrzkiss is offline  
Sponsored Links
Advertisement
 
post #2 of 13 (permalink) Old 04-30-2019, 09:55 AM
Moderator
 
Join Date: Feb 2007
Location: Milwaukee, WI
Chapter: Midwest
Year: 2005
Model: Ford Taurus
Engine: 3.0L 24v Duratec V6
Posts: 7,659
Rep Power: 87
     
Trader Score: 0 reviews
99.9% chance you have a vacuum leak you havent found yet. .1% chance you have low fuel pressure.

What are the long term fuel trims on each bank at idle and with the engine under load (i.e., cruising at higher speeds)? High positive trims at idle that drop toward zero under load = vacuum leak.

What engine? Vulcan or Tec?
sheila and Automender12345 like this.

05 Taurus SEL Duratec - my daily driver
04 Taurus SES Duratec - wifes car - TOTALED
06 Taurus SE Vulcan - wifes new ride
95 Taurus GL Vulcan winter car
Toy #1 - 86 Tbird 5.0 (original owner) - LOTS of mods
Toy #2 - 88 Tbird Turbo Coupe - LOTS of mods
67 Honda 450 Super Sport - completely customized
Jeff K is offline  
post #3 of 13 (permalink) Old 04-30-2019, 10:26 AM
Junior Member
 
Join Date: Oct 2017
Location: Lakewood, CO
Chapter: West Coast
Year: 2006
Model: Ford Taurus
Engine: 3.0L 12v Vulcan V6
Posts: 54
Rep Power: 4
 
Trader Score: 0 reviews
had those same codes last month after i changed my spark plugs and coil pack. When i was changing the plugs in the back, I accidently pulled one of the hoses to the MAF out of place and had a vacuum leak. Once i put the hose back in place, the codes cleared.
Cfella is offline  
 
post #4 of 13 (permalink) Old 04-30-2019, 11:05 AM
Crazy Devoted Member
 
Join Date: Dec 2006
Chapter: Midwest
Year: 1998
Model: Mercury Sable
Engine: 3.0L 24v Duratec V6
Posts: 22,398
Rep Power: 112
     
Trader Score: 1 reviews
May also suspect uim & lim gaskets. Is the fuel filter due for a change? Any fuel pressure sensor codes? May check its vacuum hose for wetness/strong fuel odor.

Last edited by sheila; 04-30-2019 at 11:10 AM.
sheila is offline  
post #5 of 13 (permalink) Old 04-30-2019, 09:35 PM Thread Starter
Member
 
Join Date: Jan 2012
Location: Sanford, North Carolina
Chapter: Southeast
Year: 2001
Model: Ford Taurus
Engine: 3.0L 24v Duratec V6
Posts: 151
Rep Power: 16
 
Trader Score: 0 reviews
@sheila
No fuel smells.

@Cfella & Jeff K
I am going to take it apart tomorrow and see what might have happened.
I will post back my findings afterward.
carrzkiss is offline  
post #6 of 13 (permalink) Old 05-01-2019, 01:25 PM Thread Starter
Member
 
Join Date: Jan 2012
Location: Sanford, North Carolina
Chapter: Southeast
Year: 2001
Model: Ford Taurus
Engine: 3.0L 24v Duratec V6
Posts: 151
Rep Power: 16
 
Trader Score: 0 reviews
OK.
I took the manifold off the car.
Looked around and checked everything, and then put it back on.
When I started the car up, it revved up for about 2-seconds and then back down.
So far, it is running and sounding like it should.
I cleared the codes and will post by the end of the weekend, on rather the codes come back or not.
If they don't, then next week, I will take the car in for inspection and then plates. (Hopefully)

Quick question.
My son was told that at the beginning of 2019, some codes will no longer be counted for passing inspection.
P0442
Is the code that I have had for about 2-years on the car.
Will this code pass or will it hinder me from passing inspection?
carrzkiss is offline  
post #7 of 13 (permalink) Old 05-01-2019, 03:07 PM
Crazy Devoted Member
 
Join Date: Dec 2006
Chapter: Midwest
Year: 1998
Model: Mercury Sable
Engine: 3.0L 24v Duratec V6
Posts: 22,398
Rep Power: 112
     
Trader Score: 1 reviews
Iirc, some locales will let you pass with 1 cel code. Dunno about p0442 (small evap leak)? Have you checked evap hoses? Replaced the gas cap?
sheila is offline  
post #8 of 13 (permalink) Old 05-01-2019, 07:38 PM
Moderator
 
Join Date: Feb 2007
Location: Milwaukee, WI
Chapter: Midwest
Year: 2005
Model: Ford Taurus
Engine: 3.0L 24v Duratec V6
Posts: 7,659
Rep Power: 87
     
Trader Score: 0 reviews
In some areas you can pass emissions if there are 1 or possibly 2 incomplete IM monitors, but I am not aware of any areas where you can pass the test with a failed IM monitor. An Evap P0442 code = Evap IM monitor failed = failed emissions test.
snosaint likes this.

05 Taurus SEL Duratec - my daily driver
04 Taurus SES Duratec - wifes car - TOTALED
06 Taurus SE Vulcan - wifes new ride
95 Taurus GL Vulcan winter car
Toy #1 - 86 Tbird 5.0 (original owner) - LOTS of mods
Toy #2 - 88 Tbird Turbo Coupe - LOTS of mods
67 Honda 450 Super Sport - completely customized
Jeff K is offline  
post #9 of 13 (permalink) Old 05-02-2019, 01:17 PM
Junior Member
 
Join Date: May 2014
Chapter: Southeast
Posts: 33
Rep Power: 0
 
Trader Score: 0 reviews
Quote:
Originally Posted by carrzkiss View Post
Hello All;

OK.
I changed out the Coil Pack on our 2001 Ford Taurus (DOHC)
Cleared the codes, ran the car for about 100-miles.
And all of a sudden, it started to act up again.
The codes are:
P0171 & P0174
Banks 1 & 2 - Too Lean

I have checked for air leaks, and cannot find any.
I cleaned the MAF Sensor and that seemed to have helped.
So I cleared the codes again, and the two codes above are back again.

Any information on what to check next, or replace, would be great.

Thanks.
Wayne
More than likely, you are looking at the lower intake manifold gaskets, as most Duratcecs as they age, end up giving the P0171 and 174 code when they wear out. I replaced my years ago and it never came back, after making sure it wasnt the PCV hose.
SAAN is offline  
post #10 of 13 (permalink) Old 05-02-2019, 01:46 PM Thread Starter
Member
 
Join Date: Jan 2012
Location: Sanford, North Carolina
Chapter: Southeast
Year: 2001
Model: Ford Taurus
Engine: 3.0L 24v Duratec V6
Posts: 151
Rep Power: 16
 
Trader Score: 0 reviews
The codes came back.
carrzkiss is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Taurus Car Club of America : Ford Taurus Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Similar Threads
Thread Thread Starter Forum Replies Last Post
2001 FORD TAURUS Program Airbag Module (RCM) taurusowner92 Maintenance and Repair 0 06-10-2015 03:56 PM
Check engine light on: P0171 and P0174 codes bitcat70 Maintenance and Repair 15 09-15-2014 02:10 PM
01 taurus p0171 & p0174 problems checked near everything taurus_is_killing_me Maintenance and Repair 12 08-17-2014 10:00 PM
Another P0171 and P0174 Thread Machspeed Maintenance and Repair 8 08-08-2014 11:14 PM
Taurus 2004 P0174 mikedia Maintenance and Repair 2 08-27-2013 12:18 PM

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome