P1233high severityPowertrain
Fuel Pump Driver Module Disabled or Offline
on 1996 Ford Explorer 5.0L V8 · AWD
What this code means
The PCM has lost communication with the Fuel Pump Driver Module (FPDM). The FPDM controls fuel pump speed via pulse-width modulation. When offline, the fuel pump may not operate, causing no-start or stalling conditions. This is a common issue on late 1990s to 2011 Ford vehicles including F-150, Mustang, and Crown Victoria.
Symptoms
- Engine cranks but will not start
- Engine stalls while driving
- Intermittent no-start condition
- Check Engine Light
- Loss of power while driving
Common causes
- Faulty or corroded Fuel Pump Driver Module
- Inertia Fuel Shutoff (IFS) switch tripped
- Wiring chafed on top of transmission pan
- Blown fuse in fuel pump circuit
- Corroded FPDM connector
- Failed fuel pump
Diagnostic steps
- Check if Inertia Fuel Shutoff switch needs reset (located in trunk or behind kick panel)
- Inspect FPDM connector and wiring for corrosion (module often under vehicle, exposed to elements)
- Check FPDM power supply fuse
- Inspect wiring over transmission for chafing
- Test FPDM communication with scan tool
- Check fuel pump operation directly
Repair notes
Reset IFS switch first. Check FPDM connector for corrosion. Replace FPDM if corroded or faulty. Inspect wiring over transmission pan.
Other Powertrain codes on this vehicle
P0001
Fuel Volume Regulator Control Circuit/Open
P0002
Fuel Volume Regulator Control Circuit Range/Performance
P0003
Fuel Volume Regulator Control Circuit Low
P0004
Fuel Volume Regulator Control Circuit High
P0010
Intake Camshaft Position Actuator Circuit/Open Bank 1
P0011
Intake Camshaft Position Timing Over-Advanced Bank 1
P0012
Intake Camshaft Position Timing Over-Retarded Bank 1
P0013
Exhaust Camshaft Position Actuator Circuit/Open Bank 1
P0014
Exhaust Camshaft Position Timing Over-Advanced Bank 1
P0015
Exhaust Camshaft Position Timing Over-Retarded Bank 1