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2005 Ford Explorer Sport Trac Question: Code p-1233 fuel pump driver module offline



, Phoenix, AZ, February 06, 2011, 16:43

This is the code that came up and i wanted to know how hard is it to install myself and where is it located on the truck ??

2 Answers
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  • Answer #1

    February 06, 2011, 23:47

    It is a little more complicated than receiving a codes and replacing a part. This DTC indicates the powertrain control module (PCM) is not receiving the fuel pump information on the communication link from the rear electronics module (REM). The 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. Here is a list of possible failures that could lead to this DTC:
    Inertia fuel shutoff (IFS) switch needs to be reset
    Open FPDM ground circuit
    Open circuit to FPDM PWR RLY
    Open FPDM PWR circuit
    Open or shorted FPM circuit (engine should start)
    Damaged IFS switch
    Damaged FPDM PWR RLY
    Damaged FPDM

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  • Answer #2

    techlund1 from Cottman Transmission and Total Auto Care, February 07, 2011, 09:07

    This is a problem that should only be diaged and fixed by a electrical specialist. Major problems can come about in the hands of a novice

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