DTC P0450: Pressure Sensor Circuit Open Or Shorted To Ground: Condition

DTC is set when Engine Control Module (ECM) detects Fuel Tank Pressure (FTP) sensor output voltage is out of range with engine running. FTP sensor range should be 0.1-5 volts. MIL is illuminated when ECM detects malfunction during 2 consecutive drive cycles. Possible causes are:

• FTP sensor malfunction.
• Fuel vapor passage plugged between fuel tank and EVAP canister.
• EVAP canister plugged.
• EVAP canister air filter or air filter passage plugged.
• ECM malfunction.