Back to 2000 Ford Excursion
Help
2000 FORD EXCURSION
5.4L V8 Triton•4WD•AUTOMATIC•gas
6 active safety recalls on this vehicle — view recalls
Founding sponsor spot is openYour name on every procedure for this vehicle, permanently.Sponsor — $99 →
Repairs0Labor547Torque4579Fluid9DTC724Battery1Maintenance0Recalls6
P1121moderate severityPowertrain

TP Sensor Inconsistent with MAF Sensor

on 2000 Ford Excursion 5.4L V8 Triton · 4WD

What this code means

The Throttle Position sensor and Mass Air Flow sensor readings do not agree with each other. When the throttle shows a certain opening, the MAF does not confirm the expected airflow, indicating one sensor may be faulty.

Symptoms

  • Check Engine Light
  • Poor acceleration
  • Rough idle
  • Hesitation
  • Poor fuel economy

Common causes

  • Dirty or faulty MAF sensor
  • Faulty TP sensor
  • Vacuum leak
  • Restricted air filter
  • Intake air leak

Diagnostic steps

  1. Compare TP and MAF readings simultaneously on scan tool
  2. Clean MAF sensor
  3. Check for vacuum leaks
  4. Test TP sensor through full range
  5. Replace air filter if dirty

Repair notes

Clean MAF sensor. Check for vacuum leaks. Replace faulty sensor.

🔌 Don't have a code reader?
Any of these will read and clear this code — pick by how deep you want to go.
As an Amazon Associate, OLP earns from qualifying purchases — how we link. This never changes the specs we publish.

Other Powertrain codes on this vehicle

🔧 Database maintained under the daily editorial review of Chris Hackleman · Master Technician · 20+ years and Jeff Moore · Master Lexus & Toyota Mechanic · 20+ years. Spot an error? Use the Help link above — a human reads every report.
Stuck on this repair? Take it to The Diag Desk — ask a master tech about this exact car → real human answer within 24h, never AI
Share:XRedditFBWhatsAppThreadsEmail
⚠ STILL BEHIND THE PAYWALL
The 2000 Ford Excursion repair data is incomplete because no one has sponsored it yet. For $99, we generate the full step-by-step procedures, then fact-check them with a second AI pass and your expert review. Your name on every procedure, permanently.
The same data would cost $169/mo from Mitchell1 or $30/year from ALLDATAdiy — and you'd be renting access, not freeing it. Sponsor once, free forever.
Sponsor the Ford Excursion — $99 →
Building an app?
Free API access to all this data — 50 requests/day, no card required.
Get an API key →
Run a shop?
Manage repairs, estimates, and customers with ShopBase — $249/mo, all features included.
Try ShopBase →