Hi I'm having this issue a p1288 code on a 2010 f150 5.4l fx4 it is hard to start during the winter months and when I do get the truck started the p1288 code goes away but the next morning when I test key on engine off the p1288 code is back how do I fix this problem. Thanks everyone all help is welcome

 

If you're running the PCM self test on a cold engine, that's to be expected. You're supposed to warm the engine up to operating temperature first.