Fuel Pump Driver Module Disabled or Offline (Ford)
What does P1233 mean?
The P1233 code means the vehicle's onboard diagnostic system has detected: Fuel Pump Driver Module Disabled or Offline (Ford). This is a critical severity code.
Common Symptoms
- Engine cranks but will not start
- Check Engine Light on
- No fuel pump prime heard when key is turned on
- Engine stalls and will not restart
- Intermittent no-start condition
Probable Causes (Ranked by Likelihood)
- Failed fuel pump driver module (FPDM) Very High
- Overheated FPDM due to mounting location High
- Corroded connector at fuel pump driver module Moderate
- Damaged wiring to FPDM Moderate
- PCM not sending signal to FPDM Low
Step-by-Step Diagnostic Procedure
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Listen for fuel pump prime when the key is turned to ON -- no sound indicates fuel pump circuit issue
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Check the fuel pump driver module connector for corrosion or damage
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Verify the FPDM is receiving power and ground
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Check for PCM signal to the FPDM using a scan tool
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Inspect the FPDM mounting location for heat damage -- it is often mounted near the spare tire
Frequently Asked Questions
Can I drive with code P1233?
No. If the fuel pump driver module is offline, the fuel pump will not run and the engine will not start or will stall. The vehicle will need to be towed.
What causes P1233 on Ford?
The fuel pump driver module (FPDM) is a common failure point on Ford vehicles. It is often mounted underneath the vehicle near the spare tire, where it is exposed to heat, water, and road debris.
Where is the fuel pump driver module located?
On most Ford trucks, the FPDM is mounted to the frame rail near the spare tire. On cars like the Mustang, it may be in the trunk or under the rear seat. It often overheats in this location.