HELP with Code P1233

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SINCYRE1

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I was wondering if any one can help me? I got a code P1233 and it says its a manufacture code. I wanted to know if any one knows what the code is and what needs to be done to fix it? I have a 2002 V8 and your help would be greatly appreciated. Thanks
 
http://www.obdii.com/codes.asp

P1233 Fuel Pump Driver Module Disabled or Off Line (Fuel Pump Driver Module)

have you check the fuel cutoff switch?

RESETTING THE FUEL PUMP SHUT-OFF SWITCH FUEL RESET
The fuel pump shut-off switch is a device intended to stop the electric fuel pump when your vehicle has been involved in a substantial jolt. After a collision, if the engine cranks but does not start, the fuel pump shut-off switch may have been activated.

Roadside emergencies
The fuel pump shut-off switch is located in the driver’s foot well, behind the kick panel. The reset button (RED) for the fuel pump shut-off switch is accessible through an opening in the kick panel.

Use the following procedure to reset the fuel pump shut-off switch.
1. Turn the ignition to the OFF position.
2. Check the fuel system for leaks.
3. If no fuel leak is apparent, reset the fuel pump shut-off switch by pushing in on the reset button.
4. Turn the ignition to the RUN position. Pause for a few seconds and return the key to the OFF position.
5. Make a further check for leaks in the fuel system.


:sorry: I type slllooowwww
 
Thanks a million for your help, I will do this right now, thanks.
 
I swear Quik you must have a dozen midgets looking up all this info for you. You just know way too much about the LS.
 
Quik LS said:
http://www.obdii.com/codes.asp


Roadside emergencies
The fuel pump shut-off switch is located in the driver’s foot well, behind the kick panel. The reset button (RED) for the fuel pump shut-off switch is accessible through an opening in the kick panel.

Use the following procedure to reset the fuel pump shut-off switch.
1. Turn the ignition to the OFF position.
2. Check the fuel system for leaks.
3. If no fuel leak is apparent, reset the fuel pump shut-off switch by pushing in on the reset button.
4. Turn the ignition to the RUN position. Pause for a few seconds and return the key to the OFF position.
5. Make a further check for leaks in the fuel system.
Click to expand...

I have this trouble code but the red button is pressed in already, so I am lost...any ideas?
 
is the car running?

there are both a fuel pump fuse and relay in the trunk fuse box.

THe LS is the only Ford that does not use a seperate Fuel Pump Drive Module - the REM actually drives the fuel pump duty cycle based on the PCM output. The newer mustangs use a sperate FPDM.
 
Quik LS said:
is the car running?

there are both a fuel pump fuse and relay in the trunk fuse box.
Click to expand...

Yes the car is running, I have 2 misfiring cylinders though...Ordered coils earlier today to fix that.

So in addition to the red reset button, I should sheck those fuses and relays as well?

Dave
 
Electronic Returnless Fuel Systems (ERFS) utilize a Fuel Pump Driver Module (FPDM) to control fuel pressure. The LS uses the Rear Electronics Module (REM) in place of a dedicated FPDM.

The PCM uses a Fuel Rail Pressure Sensor (FRP) for feedback. The PCM outputs a duty cycle to the FPDM to maintain the desired fuel rail pressure. During normal operation, the PCM will output a FP duty cycle from 5% to
51%. The FPDM will run the fuel pump at twice this duty cycle, e.g. if the PCM outputs a 42% duty cycle, the FPDM will run the fuel pump at 84%.

If the PCM outputs a 75% duty cycle, the FPDM will turn off the fuel pump.
The FPDM returns a duty cycled diagnostic signal back to the PCM on the Fuel Pump Monitor (FPM) circuit to indicate if there are any faults in the FPDM.

If the FPDM does not out any diagnostic signal, (0 or 100% duty cycle), the PCM sets a P1233 DTC. This DTC is set if the FPDM loses power. This can also occur if the Inertia Fuel Switch is tripped.

If the FPDM outputs a 25% duty cycle, it means that the fuel pump control duty cycle is out of range. This may occurs if the FPDM does not receive a valid control duty cycle signal from the PCM. The FPDM will default to
100% duty cycle on the fuel pump control output. The PCM sets a P1235 DTC.

If the FPDM outputs a 75% duty cycle, it means that the FPDM has detected an open or short on the fuel pump control circuit. The PCM sets a P1237 DTC.

If the FPDM outputs a 50% duty cycle, the FPDM is functioning normally.

Fuel Pump Driver Module Check Operation:
DTCs
P1233 – FPDM disabled of offline
P1235 – Fuel pump control out of range
P1237 – Fuel pump secondary circuit

Monitor execution - Continuous, voltage > 11.0 volts

Monitor Sequence - None

Monitoring Duration - 3 seconds
 
Quik LS said:
If the FPDM does not out any diagnostic signal, (0 or 100% duty cycle), the PCM sets a P1233 DTC. This DTC is set if the FPDM loses power. This can also occur if the Inertia Fuel Switch is tripped.

Fuel Pump Driver Module Check Operation:

P1233 – FPDM disabled of offline

Monitor execution - Continuous, voltage > 11.0 volts

Monitor Sequence - None

Monitoring Duration - 3 seconds
Click to expand...

So if the Inertia Fuel Switch (Red Reset?) was already depressed, and not tripped, that means that the FPDM lost power for some reason?

What is the monitor executio/sequence/duration supposed to tell me....Sorry I just don't understand that part.

Thanks so much for the help
 
yep - it telling us that the P1233 should only be thrown if the there is 0 or 100 duty cycle - so that means something off.

I believe (but not sure) if the Inertia Fuel Switch is tripped then the car should not run - as it should stop all fuel to the engine. This can happen on cars if they experience a jolt or even if a sudden cold snap can trip them.

check the fuses and relay.

forget about the Monitoring points - that is just the things that the PCM does.
 
Quik LS said:
yep - it telling us that the P1233 should only be thrown if the there is 0 or 100 duty cycle - so that means something off.

I believe (but not sure) if the Inertia Fuel Switch is tripped then the car should not run - as it should stop all fuel to the engine. This can happen on cars if they experience a jolt or even if a sudden cold snap can trip them.

check the fuses and relay.

forget about the Monitoring points - that is just the things that the PCM does.
Click to expand...

Awesome, that was much easier for me to grasp...lol...I appreciate the knowledge...I will check those fuses and relay's when I get out of work here and I will post findings...thanks

Dave
 
No update? I have the same problem, from what I read I got the 0% to 1oo%. It looses power for some reason, the car is running, strong at high rpms but at normal speeds it looses power at 50 to 65 mph atlow rpms. Also I got code (po460=fuel level sensor a circuit)(p1000=obd systems readiness test not complete. Quick ls I need ur help. Thank you. I wish dmc would post findings results.help please.
 
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