Ford F150 - P1233 code issue

I keep getting a "P1233" engine code on my 04" F150 FX4 5.4 ... The code discripition is "Fuel Pump Module Driver Off Line" ... my girl runs great, has not given me any indication that something is wrong, I have checked the paramters in "Live Data" and do not see anything out of the ordinary.

Does anyone know what this error code means? What is or meant by "Fuel Pump Module Driver" and how can it be "Off Line" when she runs fine?

I have cleared the code a couple of times now, after checking all parameters, but it still comes up with no rhyme or reason that I know of.

Any help or guidance will be appriciated!

Thanks
Posie670

Discussion from the PCED:

P1233 - Fuel System Disabled or Offline
Description:

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.

Possible causes:

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
Damaged PCM

Diagnostic aids:

The PCM expects to see one of the following duty cycle signals from the FPDM on the FPM circuit: 1) 50% (500 ms on, 500 ms off), all OK. 2) 25% (250 ms on, 750 ms off), FPDM did not receive a fuel pump (FP) duty cycle command from the PCM, or the duty cycle that was received was invalid. 3) 75% (750 ms ON, 250 OFF), the FPDM has detected a fault in the circuits between the FPDM and the fuel pump.

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What that means is that the PCM is not receiving its feedback signal from the FPDM that is supposed to let the PCM know how the FPDM is performing.

If you the diagnostic procedure, let me know and it will become available.

Steve

Thank You! This was a great help. I reset the IFS and cleared the code and so far the error has not repeated. Thanks again for your help!

Posie670

FYI, in case anyone else has P1233 code, here is another potential fix that involves replacing the FPDM:
http://www.fordf150.net/articles/idx.ph ... n-DTC.html

How do you reset your IFS.
Thanks