Free API
Help
1998 FORD F-150
5.4L V8 Triton•4WD•AUTOMATIC•gas
18 active safety recalls on this vehicle — view recalls
Founding sponsor spot is openYour name on every procedure for this vehicle, permanently.Sponsor — $99 →
Repairs0Labor514Torque3518Fluid10DTC1631Battery1Maintenance0Recalls18
P0708moderate severityPowertrain

Transmission Range Sensor Circuit High Input

on 1998 Ford F-150 5.4L V8 Triton · 4WD

What this code means

The transmission range sensor is sending a voltage signal that is higher than expected. This tells the computer the gear selector position which affects shifting and starting.

Symptoms

  • Erratic or wrong gear indication
  • No-start in park or neutral
  • Harsh or delayed shifting

Common causes

  • Faulty transmission range sensor
  • Short to voltage in wiring
  • Corroded or loose connector
  • Faulty PCM/TCM

Diagnostic steps

  1. Scan for stored codes and freeze frame
  2. Inspect range sensor connector and wiring
  3. Measure sensor signal voltage across gears
  4. Replace range sensor if out of spec
🔌 Don't have a code reader?
Any of these will read and clear this code — pick by how deep you want to go.
Budget handheld~$40
ANCEL AD410 →
No-phone-needed handheld — reads, clears, live data, freeze frame.
✓ ANCEL official store
Serious DIY~$100
BlueDriver Pro →
Enhanced codes (ABS, airbag, TPMS) plus repair reports.
SHOP FAVORITE
Shop-grade tablet~$300
Autel MaxiCOM MK808S →
Bidirectional tests, service resets, all systems.
✓ Autel official store
Pro diagnostics$1,500+
Autel MaxiSys MS906 Pro →
Full-system pro platform — topology mapping, ECU coding, the works.
✓ Autel official store
As an Amazon Associate and Autel/ANCEL partner, OLP earns from qualifying purchases — how we link. This never changes the specs we publish.

Other Powertrain codes on this vehicle

🔌 Need this data in your app? It's all in the free API →
🔧 Database maintained under the daily editorial review of Chris Hackleman · Master Technician · 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 1998 Ford F-150 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 F-150 — $99 →
Building an app?
Free API access to all this data — 10 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 →