p0456
Moderate
Alfa Romeo · Sedans & Sports Cars
Evaporative Emission System Leak Detected (Small)
Quick Answer
Error code P0456 on your Alfa Romeo Sedans & Sports Cars means: Evaporative Emission System Leak Detected (Small). This is usually fixable — see the step-by-step guide below.
Affected Models
Likely Causes
How to Fix It
1
Inspect fuel cap condition
2
Check EVAP hose routing
3
Perform smoke test on EVAP system
4
Verify purge control valve operation
Pro Tip
This fix requires some technical knowledge. If you're unsure about any step, consider contacting support or a qualified technician.
Parts You May Need
EVAP hose
Purge valve
Fuel cap
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