P0496 — EVAP Flow During a Non-Purge Condition
Category: Powertrain Severity: Medium
Updated:
DTC code P0496 means: EVAP Flow During a Non-Purge Condition. It falls under the "Powertrain" category, with an estimated severity of Medium. Common causes include canister purge valve stuck open, purge valve wiring and faulty fuel tank pressure sensor; it's worth confirming the diagnosis before replacing parts.
Possible causes
- Canister purge valve stuck open
- Purge valve wiring
- Faulty fuel tank pressure sensor
Symptoms
- Hard starting after refueling
- Rough idle
- Check engine light
- Rich idle mixture
How to diagnose it step by step
- Locate the purge valve.
- Check it seals with no power.
- Command it with a scan tool.
- Replace the valve.
How to fix it
Remove the purge valve and blow through it with no power: no air should pass. If it does, it's stuck open and must be replaced.
Estimated repair cost
Purge valve: $40–150.
Frequently asked questions
What does DTC code P0496 mean?
EVAP Flow During a Non-Purge Condition.
Is code P0496 serious?
Severity Medium. Not urgent, but worth diagnosing to avoid bigger damage.
Can I keep driving with code P0496?
Yes, you can drive; expect harder starts after refueling.
Related codes
P0497 P0457 P0456 P0455 P0453 P0452 P0449 P0447 P0446 P0443
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