Question about Ford Focus

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Hi my names joe and on my lab instructors car we pulled descriptions for a P1233 code which is fuel system disabled or offline but one of the descriptions says fpdm ground circuit is open or fpm circuit is open or shorted so can you help us understand what that is and how to fix it.

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  • Ford Master
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Year make and model?

If its a ford truck remove the FPDM module located on the crossover frame rail above the spare tire. There is a know issue of these corroding severely where the FDPM makes contact with the frame. Id will be obvious if it is as there is usually a large hole in the module and it will smell burnt and usually has water in it.

Posted on Oct 12, 2010

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Posted on Jan 02, 2017

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02 ford focus flooding so no start. I pull fuse an it will eventually start. But runs outta gas. Driver fuel module. Under seat?


Driver fuel module ???? Under the back seat ? The part your calling a driver fuel module is the fuel pump driver module ! What fuse do you pull ? If you would like help you need to go into more details . Your vehicle has electronic returnless fuel system (computer controlled ) Having the vehicle checked for DTC'S - diagnostic trouble codes could shed some light on to the problem . There is a fuel pressure sensor on the fuel injector fuel rail ,this is a input to the PCM engine computer .The PCM talks to the FPDM -fuel pump driver module to speed up or slow down the fuel pump .
P1233 Ford Fuel Pump Driver Module Diagnostics and Repair

2004 Ford 150 5 4L Stall No Start P0191 Fuel Rail Psi Sensor P1233 Fuel...

Ford Electronic Returnless Fuel System Diagnosis Part 1 Ford


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Location of fuel relay switch on 2004 ford f150 4x4 5.4 triton


Having fuel delivery problems ? It's not the fuel pump relay ! You probably have a bad fuel pump driver module . Pull you spare tire down an look on the frame above ! Watch this
F150 Expedition No Start P1233 Fuel Pump Driver Module

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So where is the oil pressure cut off switch located on 95 caprice classic


Oil pressure cut off switch ? It doesn't cut anything off , it's purposes is if the fuel pump relay doesn't work ,when the engine reaches 40 psi oil pressure ,contacts close inside supplying voltage to the fuel pump . Watch this video on Fuel Pump Electrical Circuits Description and Operation from Paul Danner . He is an automotive instructor at Rosedale tech . Fuel Pump Electrical Circuits Description and Operation

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P1233 code


ford 1233
lost spark? on 1 or all cylinders?
did you google this? 18,000 hits. just for this.
example

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

Jun 30, 2014 | 2003 Ford Crown Victoria

2 Answers

P1233 code ford contour


P1233 fuel pump driver module offline

May 10, 2011 | 2000 Ford Contour

1 Answer

Its a 99 GT, the engine winds over but dosent start, Ichecked the relay in the boot & checked & switched the relays under the hood, is there a fuse anywhere as well? if so , where? the car only has...


Fix the Ford P1233 FPDM Fuel No Start Problem Here's a fix for that no-start condition on 2004-2008 Ford trucks. The FPDM (fuel pressure driver module) usually shows up as a P1233 diagnostic trouble code (OBD-II) when the truck's codes are read. A Ford P1233 code is described as Fuel Pump Driver Module Offline or Fuel System Disabled or Offline. A search on Google for Ford P1233 shows that this P1233 DTC code is not limited to being a problem on just Ford trucks. Others with the Focus, Mustang, Town Car, etc. also experience this problem.
You may experience stalling, no-starts, random no-starts, or other potential symptoms. A quick search over at MotorcraftService.com (a Ford service web site), they offer the following possible causes if the P1233 code is triggered:
  • 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.http://www.fordf150.net/images/articles/fpdm4.jpg try link hope this helps it may be it would hate for you to change fuel pump and it not be fuel pump

Dec 08, 2010 | 1999 Ford Mustang Cobra

3 Answers

Fuel pump only comes on sometimes.


Ford released a SSM (Special Service Message) stating that 2003-2004 Town Car, Grand Marquis and Crown Victoria models may exhibit code P1233 with possible drivability or no start symptoms. It suggests that before replacing a suspect FPDM, fuel pump relay, inertia switch, fuel pump sending unit or PCM, the following things should be checked: Check for a loose PCM pin fit issue. Check for a loose or faulty ground at G101, G103, and G400. Check the FPDM harness located behind the rear seat at the base of the C-pillar for chafed wires on the bracket and check for a circuit or connection issue with the Dark Green/Yellow (DG/YE) wire which runs between the FPDM and PCM pin 40 due to a poor crimp. If all of these items check to be ok, perform normal diagnostics for code P1233.

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