Notices
1997 - 2006 Expedition & Navigator 1997 - 2002 and 2003 - 2006 Ford Expedition and Lincoln Navigator Discussion

Code P1121. No power

Thread Tools
 
Search this Thread
 
Old Dec 15, 2016 | 10:15 AM
  #1  
CopingJohnny8049's Avatar
CopingJohnny8049
Thread Starter
|
New User
Joined: Dec 2016
Posts: 2
Likes: 0
Question Code P1121. No power

My 01 Expedition 4.6L 2WD is throwing the code TPS inconsistent with MAF/MAP. i've been told alot of things.. but i havent had a straight answer yet. It's acting like it wants to try, but has 0 power. As in i cannot go up a hill. When I get it to flat land, i can get it going... very slowly. After i get up to about 4500rpm, then it kicks in and i get all of my power back. The TPS was just replaced, and it also has the code for low TPS power/TPS malfunction...

If you Guys have any ideas on what it could possibly be, please let me know.
 
Reply
Old Dec 15, 2016 | 11:00 AM
  #2  
Skauber's Avatar
Skauber
Posting Guru
Joined: Dec 2014
Posts: 1,792
Likes: 3
Did you use a genuine part or aftermarket part when replacing the TPS? Double check all wiring to the TPS to make sure it's good and connected well.

Inspect the MAF for damage, try to unplug it and see if it runs normal. It could also be a vacuum leak between the MAF and throttle body.
 
Reply
Old Dec 15, 2016 | 12:23 PM
  #3  
CopingJohnny8049's Avatar
CopingJohnny8049
Thread Starter
|
New User
Joined: Dec 2016
Posts: 2
Likes: 0
If you consider duralast quality parts, then yes. Haha. And ive tried to find a vacuum leak between the two. I've checked and rechecked all of my connections. and, as far as maf damage, i'm not too sure about that one.
 
Reply
Old Dec 15, 2016 | 12:55 PM
  #4  
Skauber's Avatar
Skauber
Posting Guru
Joined: Dec 2014
Posts: 1,792
Likes: 3
Unplug the MAF and see what happens. That forces the PCM to use default values for airflow, so if the MAF is giving bad values, then it should run fine and have power with the MAF unplugged
 
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
99svtlightning2
Escape & Escape Hybrid
4
Sep 7, 2014 01:27 PM
93Pepe
1983 - 2012 Ranger & B-Series
7
May 10, 2012 06:50 PM
Mike-11
1999 - 2016 Super Duty
3
Jan 10, 2011 11:04 AM
Jackal-73
1997 - 2003 F150
3
Oct 12, 2009 10:05 PM
lowbed dud
1997 - 2003 F150
2
Feb 13, 2009 10:03 AM




All times are GMT -5. The time now is 05:46 AM.

story-0
Top 10 Ford Truck Tragedies

Slideshow: Top 10 Ford truck tragedies.

By Joe Kucinski | 2026-05-18 19:34:33


VIEW MORE
story-1
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make

And it might be even better than that.

By Brett Foote | 2026-05-18 19:26:42


VIEW MORE
story-2
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!

Slideshow: Does lowering an F-150 Lobo RUIN the ride quality?

By Michael S. Palmer | 2026-05-18 19:20:37


VIEW MORE
story-3
Ford's 2001 Explorer Sportsman Concept Looks For a New Home

Slideshow: Ford's bizarre fishing-themed Explorer concept has resurfaced after spending decades largely forgotten.

By Verdad Gallardo | 2026-05-12 18:07:46


VIEW MORE
story-4
10 Best Ford Truck Engines We Miss the Most!

Slideshow: The 10 best Ford truck engines we miss the most.

By Joe Kucinski | 2026-05-12 13:09:47


VIEW MORE
story-5
2026 Shelby F-150 Off-Road: Better Than a Raptor R?

Slideshow: first look at the 810 hp 2026 Shelby F-150 Off-Road!

By Brett Foote | 2026-05-12 12:50:07


VIEW MORE
story-6
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!

Slideshow: Everything You Need to Know about the 2027 Super Duty Carhartt Package!

By Michael S. Palmer | 2026-05-07 17:51:06


VIEW MORE
story-7
10 Most Surprising 2026 Ford Truck Features!

Slideshow: 10 most surprising Ford truck options/features in 2026.

By Joe Kucinski | 2026-05-05 11:17:22


VIEW MORE
story-8
Top 10 Ford Trucks Coming to Mecum Indy 2026

Slideshow: Here are the top 10 Fords coming to Mecum Indy 2026.

By Brett Foote | 2026-05-04 13:49:49


VIEW MORE
story-9
5 Best / 5 Worst Ford Truck Wheels of All Time

Slideshow: The 5 best and 5 worst Ford truck wheels of all time

By Joe Kucinski | 2026-04-29 16:49:01


VIEW MORE