p0456
Easy Fix
Peugeot · Sedans & Hatchbacks
Evaporative Emission (EVAP) System Leak Detected (Small)
Quick Answer
Error code P0456 on your Peugeot Sedans & Hatchbacks means: Evaporative Emission (EVAP) System Leak Detected (Small). This is usually fixable — see the step-by-step guide below.
Affected Models
Likely Causes
How to Fix It
1
Tighten fuel cap and clear code
2
Perform smoke test on EVAP system
3
Inspect purge valve for leaks
4
Check canister hose connections
5
Replace fuel cap if damaged
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
Purge control valve
EVAP hoses
Related Error Codes