P0496 — Evaporative Emission System High Purge Flow

P0496 means your EVAP purge valve is stuck open, allowing fuel vapors to flow into the intake when they shouldn't. Replacing the purge valve solenoid is the typical fix.

Cost range: $50–$300. Severity: low. Safe to drive? Yes, but expect rough idle and possible stalling.

Most common causes of P0496

  1. Stuck-open purge valve — Common on GM vehicles. Cheap and quick to replace. ($50–$200)
  2. Cracked purge solenoid hose — Inspect for vacuum leaks at the valve. ($10–$50)
  3. Faulty fuel tank pressure sensor — Reports incorrect tank vacuum. ($80–$250)

Symptoms drivers report with P0496