p0456
Easy Fix
Volkswagen · SUVs
Evaporative Emission System Leak Detected (Very Small Leak)
Quick Answer
Error code P0456 on your Volkswagen SUVs 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
CAID4ID6B25N5N-LWBCRAtlas Cross Sport SE 2024Atlas Cross Sport SEL 2024Atlas Cross Sport SEL R-Line 2024Atlas SE 2024Atlas SEL 2024Atlas SEL Premium R-Line 2024ID.4 Pro 2024ID.4 Pro S 2024ID.4 Pro S Plus 2024ID.4 Standard 2024Taos S 2024Taos SE 2024Taos SEL 2024Tiguan S 2024Tiguan SE 2024Tiguan SEL 2024Tiguan SEL R-Line 2024
Likely Causes
How to Fix It
1
Remove the fuel cap, inspect the gasket for cracks or deformation, and replace if worn
2
Clear the code and monitor; if it returns, proceed with further diagnosis
3
Perform an EVAP smoke test to locate the very small leak in hoses, fittings, or canister
4
Test the purge valve and vent valve for proper sealing during an EVAP system self-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 with gasket
EVAP hoses and connectors
EVAP purge valve (N80)
EVAP vent valve
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