What causes P1233 on a Ford?

Corroded fuel pump driver module — the 2004–2008 F-150 mounts it on the rear crossmember where road salt destroys it Broken or corroded FPDM ground and signal wiring Blown inertia (IFS) switch cutting pump power Failed fuel pump drawing excess current Damaged PCM driver circuit to the module

How do I fix P1233 on a Ford?

Inspect the FPDM and its mounting surface for corrosion breakthrough Check power, ground and command circuits at the module connector Reset and test the inertia fuel shutoff switch Command the pump with a scanner and listen for operation Replace a corroded module and relocate or coat the new one against moisture

P1233 Fuel Pump Driver Module Off-Line

Q: What does P1233 mean on a Ford?

P1233 — Fuel Pump Driver Module Off-Line. Applies to F-150 (2004–2008 especially), Explorer, Expedition, Ranger with FPDM-controlled pumps.

Category: Powertrain - Fuel/Air Metering
Severity: Check Engine Light
Applies to: F-150 (2004–2008 especially), Explorer, Expedition, Ranger with FPDM-controlled pumps

What does P1233 mean on a Ford?

P1233 — Fuel Pump Driver Module Off-Line. This Ford-enhanced code applies to F-150 (2004–2008 especially), Explorer, Expedition, Ranger with FPDM-controlled pumps.

Common causes of P1233

Corroded fuel pump driver module — the 2004–2008 F-150 mounts it on the rear crossmember where road salt destroys it
Broken or corroded FPDM ground and signal wiring
Blown inertia (IFS) switch cutting pump power
Failed fuel pump drawing excess current
Damaged PCM driver circuit to the module

How to fix P1233

Inspect the FPDM and its mounting surface for corrosion breakthrough
Check power, ground and command circuits at the module connector
Reset and test the inertia fuel shutoff switch
Command the pump with a scanner and listen for operation
Replace a corroded module and relocate or coat the new one against moisture