Short Answer: Yes
When the Fuel Pump Driver Module (FPDM) corrodes through the back side you may not get a code at all. But when the housing is so corroded that it leaks to the atmosphere moisture and debris get inside and destroy it completely. Then the fuel pump totally stops and the engine quits. It may still get a "prime" signal to get some fuel to the fuel rail when the ignition switch is turned to on position (about 1 - 2 seconds) but will not pump fuel after the prime signal. When that happens you'll get a P0191. The code indicates a problem with the fuel rail pressure but there could actually be a few different causes: 1. Fuel Pump, 2. Fuel Pump Driver Module, 3. Open circuit or short in the fuel pump wiring harness, 4. Clogged fuel strainer or ice (don't laugh) around the fuel strainer/pickup, 5. Fuel Rail Pressure Sensor or a vacuum leak on the line that connects to the sensor, 6. Could be other causes. In my experience with Ford dealers I've found that 90% of the time they will replace the Fuel Pump ($620+), and then the Fuel Rail Pressure Sensor ($229) before they discover the problem was actually the Fuel Pump Driver Module (DIY: Advance Auto or O'Reilly $104 plus tax). Before doing anything serious, check and reset the fuel cutoff switch and fuses #32 and 34. If you only get a P0191 you may have both Fuel Rail Pressure Sensor ($114 plus tax) and Fuel Pump Driver Module ($114 plus tax). Pressure sensor is a 10-minute, 2 bolt swap out and the FPDM takes about 1/2 hour because you have to drop the spare tire to get to it. Bottom line: If you get both a P0190 and P0191, 92% of the time it's the FPDM. If you only get a P0191, 84% of the time you need the FRPS and a FPDM. The dealer will replace all these parts (pump, module, sensor) for about a grand and they may also want to replace things like COPS, PCM, OS, etc. Don't throw away your hard-earned money - fix it yourself for around $225 and less than an hour of your time. PS: These trucks (F150 04 - 08) had a design flaw with the FPDM being aluminum/zinc with steel bolts going into steel chassis member. You can't see the corrosion until you take the module off. The back-side probably will be so corroded that it has a big hole in it.
Last edited by OldSchoolFordMan; 01-11-2016 at 06:50 PM.