P1815 Transmission 4-Wheel Drive Mode Select Short to Ground

Category: Powertrain - Transmission
Severity: Check Engine Light
Applies to: F-150, Super Duty, Explorer, Ranger

What does P1815 mean on a Ford?

P1815 — Transmission 4-Wheel Drive Mode Select Short to Ground. This Ford-enhanced code applies to F-150, Super Duty, Explorer, Ranger.

Common causes of P1815

Mode select wire shorted to ground
Pinched harness under the console
Failed switch shorting internally
Corroded connector
Module fault

How to fix P1815

Isolate the short with circuit testing
Inspect console harness routing
Test the switch for internal shorts
Clean connectors
Repair the short