p0231 and p1280 BUT F/PRESSURE AT 70PSI? mil light stays on?

[gazdually]

hi guys, any idea what to change now? in the past 6 months iv changed all the injectors, 8 g/p and relay, oil,oil and fuel filters, added a k&n cone filter , it has been ok till the mil light came on a week ago , pulled 0231 and 1280 cleared them and cancelled the mil light but came on instantly, the truck starts no problem and drives ok , f/pressure sits at just under 70psi, ANY IDEAS? im not using it til i get the mil light off , cheers , gaz...