p0456
Easy Fix
Volvo · Sedans & Wagons
EVAP Very Small Leak
Quick Answer
Error code P0456 on your Volvo Sedans & Wagons means: EVAP 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
Replace fuel filler cap with OEM part
2
Inspect all EVAP hoses with magnifying glass
3
Perform sensitive smoke test for micro-leaks
4
Test purge control valve seal
5
Check vent valve for sticking
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 filler cap
EVAP hoses
Purge control valve
Vent valve
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