Free API
P0804low severityPowertrain

1-4 Upshift (Skip Shift) Lamp Control Circuit

on 2020 Ford F-150 5.0L V8 Coyote · RWD

What this code means

A fault has been detected in the 1-4 upshift (skip shift) lamp control circuit on the instrument cluster. The warning lamp may not illuminate correctly to indicate skip shift operation.

Symptoms

  • Skip shift lamp inoperative or stays on
  • Check engine light on
  • No shift indication to driver

Common causes

  • Burned out skip shift indicator bulb
  • Open or short in lamp circuit wiring
  • Faulty instrument cluster
  • Faulty PCM output driver

Diagnostic steps

  1. Scan for stored codes
  2. Inspect lamp circuit wiring and connectors
  3. Test indicator bulb or LED operation
  4. Verify PCM command and cluster function

Other Powertrain codes on this vehicle

🔧 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
⚠ STILL BEHIND THE PAYWALL
The 2020 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 →