DTC P1450: EVAP System Malfunction - Excessive Vacuum: Condition

DTC is set when PCM detects fuel tank pressure is low (15.7 inHg) after engine is started in cold condition and vehicle speed is less than 62 MPH. Possible causes are:

• Canister Drain Cut Valve (CDCV) malfunction.
• EVAP air filter clogged.
• Charcoal canister malfunction.
• Blockage or leakage in system hoses.
• Fuel tank pressure sensor malfunction.
• Purge solenoid valve malfunction.