p0455
Moderate
Alfa Romeo · Sedans & Sports Cars
Evaporative Emission System Leak Detected (Large)
Quick Answer
Error code P0455 on your Alfa Romeo Sedans & Sports Cars means: Evaporative Emission System Leak Detected (Large). This is usually fixable — see the step-by-step guide below.
Affected Models
Likely Causes
How to Fix It
1
Inspect fuel cap and replace if damaged
2
Check EVAP hose connections
3
Smoke test the EVAP system
4
Inspect charcoal canister for cracks
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
Fuel cap
EVAP hose
Purge valve
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