Decided to check my codes again since the p0430 code still had my ces light on. Now im getting the P0430 and P1233 codes. This is what i've found for the P1233, pretty much everywhere ive looked but i can't find ways to fix or diagnose it. The car is hesitating in the lower rpms on and off, and it almost has a hissing sound to it in the engine bay. I can tell the difference in the sound of the of the exaust and the feel of the gas pedal when i put my foot on it that it is losing power.

Ford's Powertrain Control/Emissions Diagnosis manual for P1233:


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
Also for Mustang:
Open B+ circuit to the constant control relay module (CCRM) pin 11
Open ground to CCRM pin 18
Damaged CCRM


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.

 

any input

 

CHECK BODY GROUND FROM BATTERY THAT'S WHAT MIND WAS AND MY 2004 MACH1 RUNS GREAT!