Possible Causes

Malfunction is detected when an excessively low voltage is sent to ECM from EVAP-CSPS. Possible causes are:

EVAP-CSPS circuit open or shorted.
Defective EVAP-CSPS.
EVAP-CSPS hose clogged, kinked, leaking, disconnected or improperly connected.
Defective EVAP Canister Vent Control Valve (EVAP-CVCV).
Defective EVAP Canister Purge Volume Control Solenoid Valve (EVAP-CPVCSV).
Defective EVAP canister.
Defective hose between EVAP-CVCV and water separator.

NOTE: Before proceeding, ensure ambient temperature is more than 41°F (5°C).