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.

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

Code

P1233

Fuel Pump Driver Module Off-Line

Category: Powertrain - Fuel/Air Metering
Severity: Check Engine Light
Applies to: F-150 (2004-2008 especially), Explorer, Expedition, Ranger with FPDM-controlled pumps
Related: P0230 Fuel Pump Primary Circuit on OBD Codes List

Findings, check these first

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

Standard procedure

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

Code lookup

Type a code above, or start from a symptom or a common code.

Press / to jump to the box. Ford-enhanced powertrain, body, chassis and network codes. Generic P0xxx codes live on OBD Codes List.

Sources and review

Review: checked against the recorded source material.

OBDII.pro: P1233 Ford definition
live reference page (obdii.pro)
Supports: Ford-family meaning for P1233: Fuel Pump Driver Module Off Line
Fetched directly. obdii.pro is a publisher independent of the engine-codes family.
P1233 FORD Code: Meaning, Causes, and Symptoms | OBD2 Codes
live reference page (obd2-codes.co)
Supports: Ford meaning for P1233: Fuel Pump Driver Module Disabled Or Off Line
Fetched directly. obd2-codes.co phrasing matches the engine-codes family, so it counts as one publisher.

Last updated 2026-09-20.

Report a correction for P1233. Include your vehicle, the issue and a source if you have one.