P0498 - Evaporative Emission System Vent Valve Control Circuit Low

The EVAP vent valve control circuit is lower than expected.

Code Overview

The EVAP vent valve control circuit is lower than expected.

Common Causes

• Stuck purge or vent valve
• Wiring or connector issue
• Restriction or leak in the EVAP system

Diagnostic Steps

1. Command purge and vent valves on and off
2. Inspect hoses and valve connectors
3. Use smoke or flow testing if needed

Likely Repairs & Cost Guides

Use test results to confirm the fault before pricing the repair.

Related OBD Codes

Browse the closest code-family pages when the same fault pattern often shows up nearby.

Next Steps

Move from the code to a diagnosis path, then into repair pricing once the fault is confirmed.