DTC P0452: Evaporative Emission System Pressure Sensor/Switch Low

WARNING: This page does not describe the selected car, but rather 25 other vehicles, including the 2013 Lincoln Navigator, 2013 Lincoln MKZ, 2013 Lincoln MKX, 2013 Lincoln MKT, and 2013 Lincoln MKS. However, it is still accessible from the selected car via links, so may be relevant.

DTC P0452: EVAPORATIVE EMISSION SYSTEM PRESSURE SENSOR/SWITCH LOW

For Vehicles With NVLD Module
Description:	This DTC sets when the natural vacuum leak detection (NVLD) module pressure switch voltage is out of range low.
Possible Causes:	NVLD module VBATT circuit open Damaged NVLD module
Diagnostic Aids:
For All Others
Description:	This DTC sets when the signal average drops below a minimum allowable calibrated parameter.
Possible Causes:	Contamination internal to the fuel tank pressure (FTP) sensor connector FTP circuit open VREF circuit open FTP circuit short to ground FTP circuit short to SIGRTN Damaged FTP sensor
Diagnostic Aids:	An FTP voltage PID reading less than 0.22 volt in key ON, engine OFF or key ON, engine running indicates a concern is present.
Application	Key On Engine Off	Key On Engine Running	Continuous Memory
Fiesta	GO to PINPOINT TEST HZ .
All others	GO to PINPOINT TEST HX .