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Diagnose/P0498
P0498Low SeverityEmissions

Evaporative Emission System Vent Valve Stuck Open

What This Means

The evaporative emission system vent valve stuck open has been detected by the engine computer. This affects the emission control system and may cause increased tailpipe emissions.

Common Symptoms

  • Check engine light on
  • Failed emissions test
  • No driveability change
  • Diagnostic code stored

Common Causes

  • Faulty emission control valve
  • Wiring damage
  • Relay or fuse failure
  • Connector corrosion
  • PCM circuit issue

Estimated Repair Cost

$100 – $500
Parts and labor (varies by vehicle and location)
Difficulty:Moderate

Need This Fixed?

Find certified mechanics near you who can diagnose and repair P0498.

Find a Shop Near You

For informational purposes only. Diagnostic trouble codes are starting points for diagnosis, not definitive answers. Always consult a certified mechanic for proper diagnosis and repair. Estimated costs vary by vehicle, location, and shop rates.