Need help with peterbilt 587

My engine light just popped up and I am showing system engine spn 157 fmi 18 fuel rail pressure. Is it possible that its a sensor problem? There's nothing leaking from what i can tell. Could Ta or petro fix it or do I have to have go to the dealer to fix it.

 

Ok the engine light is gone and the code isn't active anymore. I wonder if my fuel was starting to gel earlier and was messing with the fuel system. I added a bit of antigel to my tanks a few hours ago.

 

It gelled and messed up my fuel filter. I just swapped out the old filter for a new one. I added more anti gel to the tank because i just filled up. Is their anything else that can get messed up by gelled fuel?