troubleshoot

Hello everyone, I have a 2006 Ford Mustang GT and I am having trouble with a CEL, code P0453 (EVAP System Pressure Sensor/Switch Circuit High). I have already replaced the Fuel Rail Injection Pressure Sensor because I read that might be an issue, but no luck. Now I am considering replacing...

I just swapped a new 3v into my 05. The old one didn't have any major modifications and it just has a Borla exhaust, Bama tuner, and cold air. You're basic stuff to get you the 200 extra hp you want... Anyway, I got the swap done and everything seems to be in order. The engine is running lean...