P1234 FORD – Fuel Pump Driver Module Disabled Or Off Line

P1234 FORD Possible Symptoms

Engine Light ON (or Service Engine Soon Warning Light)

P1234 FORD Possible Causes

Inertia fuel shutoff (IFS) switch needs to be reset,Faulty Fuel Pump Driver Module (FPDM),Fuel Pump Driver Module (FPDM) harness is open or shorted,Fuel Pump Driver Module (FPDM) circuit poor electrical connection,Faulty Inertia Fuel Shutoff (IFS) switch,Faulty Powertrain Control Module (PCM)

P1234 FORD Description

The Powertrain Control Module (PCM) monitors the Fuel Pump Monitor (FPM) circuit from the Fuel Pump Driver Module (FPDM). With the key on, the FPDM continuously sends a duty cycle signal to the PCM through the FPM circuit. The test fails if the PCM stops receiving the duty cycle signal.