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
Applies to all models
P2C8P3C8P4C8P5C8P5PSP2E8P3E8
Likely Causes
  1. Loose or faulty fuel cap
  2. Small crack in fuel filler neck
  3. Leaking purge control valve
  4. Faulty charcoal canister seal
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
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