Possible Causes

Malfunction is detected when EVAP control system does not operate properly, or there is a leak between intake manifold and EVAP-CSPS. Possible causes are:

EVAP-CPVCSV stuck closed.
Faulty EVAP-CSPS or circuit.
Loose, disconnected or improper connection of hoses.
Blockage in hoses.
Blocked hose to MAP/BARO switch solenoid valve.
Cracked EVAP canister.
Faulty EVAP-CPVCSV circuit.
Defective (closed) Throttle Position (TP) switch.
Blocked purge port.
Defective EVAP Canister Vent Control Valve (EVAP-CVCV).

NOTE: Before proceeding, ensure ambient temperature is 41°F (5°C) or more and battery voltage is more than 11 volts at idle.