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Old 01-03-2009, 12:05 PM   #1
Ecko200X
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P1233

Alright So Yesterday I Was Driving Down The Road When The Throttle Became None Responsive And Sluggish. Like It Wasn't Getting Any fuel At All. Pull Along Side The Road. The Eventually Shortly Died, It Would Start Up Several Times Then Die Right Away. Now It Will Only Start With A Little Shot Of Ether. Though Will Die Right After StartAs Well. Pulled The Fuel Line Off The Fuel Rail. No Fuel Comes Out When Cranked. Checked The Codes And I Recieved Only This Code.

P1233-Fuel Pump Driver Module Offline Or Disconnected.

I Have Just Ordered A New Module For, But Are Theyre Any ideas On Any Other Possibilities.

Note: Last Weekend We Ran Live Data To Check The Fuel Pump And It Was Running Fine. So I Don't Think It's The Fuel Pump Unless They Go That Abruptly.

Any Knowledge Is Greatly Appreciated!

Thanks,
John


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Old 01-03-2009, 01:37 PM   #2
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Thais is the full DTC for that Code

P1233 - Fuel System Disabled or Offline LS6/LS8:
For LS6/LS8, P1233 indicates the PCM is not receiving the fuel level information on SCP from the rear electronics module (REM). Refer to the Workshop Manual Section 413-01 for diagnostics.
All Others:
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. Inertia fuel shutoff (IFS) switch needs to be reset
Open FPDM ground circuit
Open or shorted FPM circuit
Damaged IFS switch
Damaged FPDM
Damaged PCM
Also for Escort/Tracer and Mustang:
Open FPDM PWR circuit
Open B+ circuit to constant control relay module (CCRM) pin 11
Open ground to CCRM pin 18 (Mustang)
Damaged CCRM
Also for Continental:
Open VPWR circuit to FPDM
The PCM expects to see one of the following duty cycle signals from the FPDM on the FPM circuit: 1) 50% (500 msec on, 500 msec off), all OK. 2) 25% (250 msec on, 750 msec 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 msec ON, 250 OFF), the FPDM has detected a fault in the circuits between the FPDM and the fuel pump.
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Old 01-03-2009, 06:02 PM   #3
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^^^You sir, are awesome... Rarely do fuel pumps go up like that, so hopefully its that weak module full of fail.
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Old 01-14-2009, 04:08 PM   #4
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Well I Just Changed That Module Today. Though Same Problem Still Present. Won't Start At All. When Aided With A Shot Of Ether, It Starts Right Up But Dies 2 Seconds Later.

Any Other Suggestions Or Ideas? Or Could It Finally Be That Fuel Pump. I Might Say What The Hell And Change It Out This Weekend. If That Doesn't Work I Guess It's Time To Give It In And Take It Somewhere
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Old 01-14-2009, 04:24 PM   #5
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Also! Just Checked The Codes Again. Same One From Before P1233.

Plus A New One P1000-OBDII Systems Readiness Check Incomplete. Don't Know If This Would Affect Anything. But It Doesn't Hurt To Post It.
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Old 03-17-2009, 12:31 AM   #6
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i got the exact same code a problem!!! i did the same thing and had the same results!!!!the other code is nothing i was told it goes away after u drive for a while it's from resetting the pcm. i got my fpdm on ebay and nothing changed! i'm going for the fuel cut off switch next, easier then dropping the tank!!! i might take it in though. cause i'm stumped. let us know if u get anywere, and i'll do the same!!!!!
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Old 03-17-2009, 01:04 AM   #7
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The car is running again, after throughout electrical testing including fuse, relay, fuel pump shut off switch, the trouble was a bad fuel pump relay. Switched the relay with the high beams good relay and it starts right up! So if anyone is getting a p1233 code sometime, check that relay! That's probably why my car was randomly having bad starts and idle sometimes until it got warmer, maybe the relay wasn't clicking immediately with the ignition on.

this is a Quote from someone last fall.
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Old 03-17-2009, 11:23 AM   #8
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> Plus A New One P1000-OBDII Systems Readiness Check Incomplete


You will get this code for while after every time you erase trouble codes or disconnect the battery. The vehicle monitors the operation of various systems while you drive the car under various conditions, e.g., one of the tests might require highway driving to take place. Until the vehicle is run enough, under enough varying conditions, to complete these tests the P1000 code will be there.

Basically that code exists so people cannot erase trouble codes just before going for an emissions test to pass a failing vehicle. If the P1000 code comes up at the emissions testing station, they will tell you to go away, drive it a few days, and bring it back for a retest.
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