I have had this code for a few months now, i can seem to clear it. So I have, cleaned MAF, replaced fuel filter, ran injector cleaner, seafoam, replaced hoses and gaskets and PCV, no leaks with a smoke test, and have replaced both o2 sensors with factory sensors. CAT was removed by PO, I also did the resistor to EGR. When I did replace the fuel filter I reset the ECM, I was able to drive about 50 miles before the code came back on. Any other ideas I should try? Car seems to run fine, no issues, but the CEL is on of course. I did call a toyota mechanic who was too busy to look at my truck but did state that there was a "bulb/mushroom shaped valve or filter" at the back of the fuel rail that he has seen get clogged and cause this issue, idk what he was talking about maybe someone else can shed light on the part he was referring to. Any help would be appreciated, I kind of ignored this bc the truck runs fine but really would like to clear the code. Thanks in advance!