P0452 ford f150

Question

Hello,

I have a 2005 Ford F150 5.4L V8
have check engine light on
code is P0452.
I have replaced the fuel pressure sensor check all hoses and wire and found no holes or lose connections

Running out of ideas

Answer 1

P0452 Fuel tank pressure sensor circuit low voltage detected

This code condition is considered a hard fault code condtion, the best first step is the replacement of the FTP sensor regardless if it test out good, this ensure that the root cause os not due ot a failed or shorted FTP. You would need to test the connection of the FTP starting with the FTP PWR connection which should measure at 4.0 to 6.0 volts with key on engine off.This is what the ECM sees if it does not see this voltage measurement the ECM would be faulty.