p0456
Easy Fix
Volkswagen · Sedans
Evaporative Emission System Leak Detected (Very Small Leak)
Quick Answer
Error code P0456 on your Volkswagen Sedans means: Evaporative Emission System Leak Detected (Very Small Leak). This is usually fixable — see the step-by-step guide below.
Affected Models
Applies to all models
Likely Causes
How to Fix It
1
Inspect the fuel cap for damage, wear, or a missing gasket; tighten or replace and clear the code
2
Perform an EVAP smoke test to locate the small leak in hoses, connections, or canister
3
Check all EVAP hose connections at the fuel tank, charcoal canister, and purge valve for looseness
4
Test the EVAP purge valve and vent valve for proper sealing using a scan tool EVAP test
Pro Tip
This is a common issue that most users can resolve without specialized tools. Try the first step before moving on to more complex solutions.
Parts You May Need
Fuel cap
EVAP hoses and connectors
EVAP purge valve (N80)
EVAP vent valve
Charcoal canister
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