P1272 Cylinder 2 High to Low Side Open (7.3L Diesel)

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

What does P1272 mean on a Ford?

P1272 — Cylinder 2 High to Low Side Open (7.3L Diesel). This Ford-enhanced code applies to F-250/F-350 Super Duty with 7.3L Power Stroke.

Common causes of P1272

Open injector solenoid on cylinder 2
Broken harness wire under the valve cover
Unplugged injector connector
Failed injector
IDM driver fault

How to fix P1272

Buzz test and isolate cylinder 2
Inspect the under-cover harness
Test injector resistance
Reseat connectors
Replace the injector or repair wiring