DTC P0442: EVAP Control System Small Leak: Condition

WARNING: This page is about a different car, the 2002 Mazda 626. However, it is still accessible from the selected car via links, so may be relevant.

DTC is set when a small leak is detected in evaporative emission system. Possible causes are:

Purge solenoid valve malfunction.
Canister Drain Cut Valve (CDCV) malfunction.
Loose fuel filler cap.
Charcoal canister malfunction.
Catch tank malfunction.
Pressure control valve malfunction.
Cracked fuel tank.
Fuel tank components improperly installed.
Evaporative hoses damaged or loose.
Fuel tank level sensor malfunction.
Fuel Tank Pressure (FTP) sensor malfunction.
Engine Coolant Temperature (ECT) sensor malfunction.
Intake Air Temperature (IAT) sensor malfunction.
Throttle Position (TP) sensor malfunction.
Mass Airflow (MAF) sensor malfunction.
Vehicle Speed Sensor (VSS) malfunction.