DTC Troubleshooting: P0499
DTC P0499: EVAP Canister Vent Shut Valve Circuit High Voltage
NOTE: Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information.

DTC Description
Confirmed DTC
Pending DTC
Freeze Frame
P0499 EVAP Canister Vent Shut Valve Circuit High Voltage
      

1.
Problem verification:

Problem verification
?1.
Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode.

?2.
Clear the DTC with the HDS.


?3.
Select EVAP TEST in the INSPECTION MENU, then select the EVAP CVS ON in the SINGLE SOLENOID with the HDS.

  

?4.
Check for Pending or Confirmed DTCs with the HDS.
DTC Description
Confirmed DTC
Pending DTC
Freeze Frame
P0499 EVAP Canister Vent Shut Valve Circuit High Voltage
      

Is DTC P0499 indicated?

     
YES
     
     
     
The failure is duplicated. Update the PCM if it does not have the latest software, or substitute a known-good PCM, then do the repair verification.
     
NO
     
     
     
Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the EVAP canister vent shut valve and the PCM.?
Repair verification (OBD STATUS check):

?1.
Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode.

?2.
Reset the PCM with the HDS.


?3.
Do the PCM idle learn procedure.

?4.
Select EVAP TEST in the INSPECTION MENU, then select the EVAP CVS ON in the SINGLE SOLENOID with the HDS.

  

?5.
Monitor the OBD STATUS for DTC P0499 in the DTCs MENU with the HDS.
DTC Description
OBD STATUS
P0499 EVAP Canister Vent Shut Valve Circuit High Voltage
  


Does the HDS indicate PASSED, FAILED, or NOT COMPLETED?

     
PASSED
     
     
     
Troubleshooting is complete. If the PCM was substituted, replace the original PCM. If any other Pending or Confirmed DTCs are indicated, go to the indicated DTC's troubleshooting.?
     
FAILED
     
     
     
Go to step 1 and recheck. If the PCM was updated, substitute a known-good PCM, then check the OBD STATUS again.
     
NOT COMPLETED
     
     
     
Meet the test condition, and check the OBD STATUS again.