P0451 - EVAP System Pressure Sensor/Switch A Circuit Range/Performance

DTC DESCRIPTION P0451 - EVAP SYSTEM PRESSURE SENSOR/SWITCH A CIRCUIT RANGE/PERFORMANCE

Description:	This DTC sets when a fuel tank pressure (FTP) sensor range (offset) concern is detected. The FTP sensor output is offset by greater than 1.7 inches of water or less than -1.7 inches of water.
Possible Causes:	FTP circuit intermittent open FTP circuit intermittent short FTP sensor intermittent open FTP sensor intermittent short Contaminated FTP sensor Damaged FTP sensor
Diagnostic Aids:	With the FTP sensor at atmospheric pressure, the FTP PID normally indicates 0 inches of water. Remove the fuel filler cap or, for vehicles with a capless fuel filler pipe, install the supplemental refueling adaptor provided with the vehicle to open the capless fuel tank filler pipe. After installing the supplemental refueling adaptor or removing the fuel filler cap, wait one minute to allow the pressure in the fuel tank to equalize with the ambient air pressure before accessing the PID.
Application	Key On Engine Off	Key On Engine Running	Continuous Memory
All	GO to Pinpoint Test HX.