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 01:17 AM.

story-0
Top 10 Fords at 2026 Carlisle Ford Nationals

Slideshow: Top 10 Fords at 2026 Ford Nationals

By Joe Kucinski | 2026-06-09 11:10:08


VIEW MORE
story-1
3 Best / 3 Worst Parts of Modern Ford Ownership

Based on years of owning multiple modern Ford products.

By Brett Foote | 2026-06-09 10:53:36


VIEW MORE
story-2
10 Amazing Upgrades That Solve Common Ford Truck Owner Headaches

SPONSORED: From muddy boots to rain-soaked cargo, these upgrades address some of the most common frustrations Ford truck owners face every day.

By Pouria Savadkouei | 2026-06-08 18:50:34


VIEW MORE
story-3
Every 2026 Ford Engine Explained

Here's everything you need to know about every Ford engine available for the 2026 model year.

By Brett Foote | 2026-06-05 12:58:01


VIEW MORE
story-4
10 Ugly Ford Trucks That We Still Kinda Love

Slideshow: 10 ugly Ford trucks that we still kinda love.

By Joe Kucinski | 2026-06-03 09:51:16


VIEW MORE
story-5
10 Things Every Truck Owner NEEDS (2026 Edition)

Slideshow: the best gifts for dads & grads

By Michael S. Palmer | 2026-06-03 15:43:58


VIEW MORE
story-6
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath

Slideshow: Called the Fortress, the 850-horsepower pickup combines Raptor underpinnings with military-inspired features, survival equipment, and a starting price of $285,000.

By Verdad Gallardo | 2026-06-03 11:38:36


VIEW MORE
story-7
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer

Slideshow: 10 most expensive Ford trucks ever sold on Bring a Trailer.

By Joe Kucinski | 2026-05-27 16:24:34


VIEW MORE
story-8
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)

Here's everything that has changed for the latest model year.

By Brett Foote | 2026-05-27 16:17:28


VIEW MORE
story-9
Top 10 Ford Truck Tragedies

Slideshow: Top 10 Ford truck tragedies.

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


VIEW MORE