DTC Confirmation Test

Malfunction is detected when improper voltage is sent to ECM from EVAP Control System Pressure Sensor (EVAP-CSPS). Possible causes are:

EVAP-CSPS circuit open or shorted.
Blockage or leak in hose to EVAP-CSPS.
Defective EVAP-CSPS.
Defective EVAP Canister Vent Control Valve (EVAP-CVCV).
Defective EVAP Canister Purge Volume Control Valve (EVAP-CPVCV).
Defective EVAP canister.
Faulty hose between EVAP-CVCV and water separator.

CAUTION: DO NOT use ECM ground terminals when measuring voltage.

To set DTC, start engine and warm to normal operating temperature. Turn ignition off and wait at least 5 seconds. Turn ignition on. Using scan tool, select DATA MONITOR, and read FUEL T/TMP SE value. Ensure value is more than 32°F (0°C). Start engine and wait at least 20 seconds. If first trip DTC is detected, perform DIAGNOSTIC PROCEDURE .