Advanced Diagnostics

DTC P0498: Evaporative Emission (EVAP) Canister Vent Shut Valve Control Circuit Low Voltage




General Description
The evaporative emission (EVAP) canister vent shut valve is attached to the EVAP canister to control the ventilation of the EVAP canister to atmosphere.

The EVAP canister vent shut valve is open (open to atmosphere) when the VSV signal is OFF.

If the return signal is Low when the powertrain control module (PCM) outputs the ON signal to the EVAP canister vent shut valve, the PCM detects a malfunction and a DTC is stored.




Monitor Execution, Sequence, Duration, DTC Type, OBD Status




Enable Conditions

Malfunction Threshold
The return signal is 'Low' for at least 5 seconds when the PCM outputs the 'ON' signal to the EVAP canister vent shut valve.

Confirmation Procedure with the HDS
Do the EVAP CVS ON in the INSPECTION MENU with the HDS.

Diagnosis Details

Conditions for illuminating the MIL
When a malfunction is detected, the MIL comes on and the DTC and the freeze frame data are stored in the PCM memory.

Conditions for clearing the MIL
The MIL will be cleared if the malfunction does not recur during three consecutive trips in which the diagnostic runs.

The MIL, the DTC, and the freeze frame data can be cleared by using the scan tool Clear command or by disconnecting the battery.