P0496Low urgency
EVAP Flow During Non-Purge Condition
Emission · EVAP System
✅ Safe to drive — check gas cap first.
What this means
The EVAP system is detecting fuel vapor flow when the purge valve should be closed. This often causes a rough idle because fuel vapors are entering the intake uncontrollably.
Likely causes
- Stuck-open EVAP purge valveMost common
- Faulty purge valve solenoidMost common
- Loose gas capCommon
Estimated repair cost
EVAP purge valve replacement$75 – $200
Gas cap replacement$10 – $30
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Frequently asked questions
What does P0496 mean?
The EVAP system is detecting fuel vapor flow when the purge valve should be closed. This often causes a rough idle because fuel vapors are entering the intake uncontrollably.
Is P0496 serious?
Safe to drive — check gas cap first.
How much does it cost to fix P0496?
Repair costs for P0496 range from $75 – $200 depending on the root cause and your vehicle.
Can I drive with P0496?
Yes, the vehicle is safe to drive. Schedule a repair at your convenience.