03 cobra pumps in a 99gt.

i put the vortech v2 on my car and did the cobra pumps also. the car is running fine and gets 41 to 43 fuel pressure. i dont run the car below 1/2 tank of gas due to the gt tank not having the baffel like the cobras do. the problem i'm having is that i'm getting a fuel pressure sensor code and sometime a check engine light. what would cause this? i'm not running it low enough to suck air and it's done this to me with a full tank. do you think that i need a boost a pump or a hot wire kit? thanks in advance.
 
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