p0455
Moderate
Fiat · Cars
Evaporative Emission Control System Leak (Large)
Quick Answer
Error code P0455 on your Fiat Cars means: Evaporative Emission Control System Leak (Large). This is usually fixable — see the step-by-step guide below.
Affected Models
Likely Causes
How to Fix It
1
Inspect fuel filler cap and replace if damaged
2
Check all EVAP hoses for cracks or disconnections
3
Smoke test the EVAP system to locate leaks
4
Inspect charcoal canister for damage
5
Replace purge control valve if faulty
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 filler cap
EVAP hoses
Charcoal canister
Purge valve
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