What causes P1392 on a Ford?

Shorted bank 1 glow plug circuit Failed plug shorting internally Chafed bank 1 harness Stuck relay holding power on Controller fault

How do I fix P1392 on a Ford?

Check for shorts in the bank 1 circuit Test each plug for internal shorts Inspect harness routing for chafing Verify the relay releases Repair wiring or replace the plug

P1392 Glow Plug Circuit High Input Bank 1

Q: What does P1392 mean on a Ford?

P1392 — Glow Plug Circuit High Input Bank 1. Applies to F-250/F-350 Super Duty diesel.

Category: Powertrain - Fuel/Air Metering
Severity: Check Engine Light
Applies to: F-250/F-350 Super Duty diesel

What does P1392 mean on a Ford?

P1392 — Glow Plug Circuit High Input Bank 1. This Ford-enhanced code applies to F-250/F-350 Super Duty diesel.

Common causes of P1392

Shorted bank 1 glow plug circuit
Failed plug shorting internally
Chafed bank 1 harness
Stuck relay holding power on
Controller fault

How to fix P1392

Check for shorts in the bank 1 circuit
Test each plug for internal shorts
Inspect harness routing for chafing
Verify the relay releases
Repair wiring or replace the plug