Fuel Pump Low Pressure / Fuel Pump Driver Module Out of Range (Ford)
What does P1230 mean?
The P1230 code means the vehicle's onboard diagnostic system has detected: Fuel Pump Low Pressure / Fuel Pump Driver Module Out of Range (Ford). This is a critical severity code.
Common Symptoms
- Check Engine Light on
- Engine stalls while driving
- Hard starting or no start
- Loss of power under acceleration
- Engine sputtering at highway speed
Probable Causes (Ranked by Likelihood)
- Faulty fuel pump driver module (FPDM) Very High
- Weak or failing fuel pump High
- Corroded FPDM connector Moderate
- Poor ground connection at FPDM mounting location Moderate
- Wiring fault between PCM and FPDM Low
Step-by-Step Diagnostic Procedure
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Check fuel pressure at the fuel rail with a gauge
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Test the fuel pump driver module output voltage with a multimeter
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Inspect the FPDM connector for corrosion (located near the spare tire on many Ford trucks)
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Check the FPDM ground connection for corrosion
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Replace the FPDM if output voltage is incorrect
Frequently Asked Questions
What is the fuel pump driver module?
The FPDM on Ford vehicles controls fuel pump speed electronically based on commands from the PCM. It varies the voltage to the fuel pump to adjust fuel pressure for different driving conditions.
Where is the FPDM located on Ford trucks?
On most Ford F-150 trucks, the FPDM is mounted underneath the vehicle near the spare tire or rear of the frame. This location exposes it to road spray, mud, and corrosion, which is a common cause of failure.
Can I bypass the FPDM?
Bypassing the FPDM is not recommended as it provides important fuel pressure control. Running the fuel pump at full voltage all the time wastes fuel, reduces pump life, and can cause excessive fuel pressure.