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Hello all, new member here and new proud owner of a 2004 f150 lariat. 5.4 liter 3 valve. Truck was throwing a check engine light and gave the p0191 fuel rail code. I have just replaced the the fpdm and the fuel filter. I figured they both needed it at 160,000 miles. I also reset the computer by unhooking battery. Hoping it is better now, but may take a few drives to know for sure. If for some reason this turns out unsucessful, can anyone give me some insight to the next step or steps. Please and thank you from the new guy in the mitten.
hello i just got the same code today myself with my 08 F150 XLT 5.4 i did some checking and found the same error code you did so i looked under the truck and found this mess i'm surprised i made it home with it
Back side
Front side
i'm hoping this is my problem it is the Fuel Pump Driver Module /Dorman part number 590-001
PS: my wife was not a happy camper when i set this down on the coffee table LOL
p0191 code
