P1265 Cylinder 5 High to Low Side Short

Category: Powertrain - Fuel/Air Metering
Severity: Check Engine Light
Applies to: F-250/F-350 Super Duty with 7.3L Power Stroke

What does P1265 mean on a Ford?

P1265 — Cylinder 5 High to Low Side Short. This Ford-enhanced code applies to F-250/F-350 Super Duty with 7.3L Power Stroke.

Common causes of P1265

Shorted cylinder 5 injector
Harness damage
Connector short
Oil intrusion
IDM fault

How to fix P1265

Buzz test cylinder 5
Inspect the harness
Test injector for shorts
Check connectors
Repair wiring or replace the injector