DTC P1450: EVAP System Malfunction, Excessive Vacuum: Condition

DTC is set when PCM detects fuel tank pressure is low after engine is started in cold condition and vehicle speed is less than 59 MPH. Possible causes are:

• Canister Drain Cut Valve (CDCV) malfunction.
• EVAP air filter clogged.
• Charcoal canister malfunction.
• Evap drain passage clogged.
• FTP sensor malfunction.
• Purge solenoid malfunction.