p0456
Moderate
Citroen · Sedans & Hatchbacks
Evaporative Emission System Leak Detected (small leak)
Quick Answer
Error code P0456 on your Citroen Sedans & Hatchbacks means: Evaporative Emission System Leak Detected (small leak). This is usually fixable — see the step-by-step guide below.
Affected Models
Likely Causes
How to Fix It
1
Perform EVAP system smoke test
2
Inspect all EVAP connection points
3
Check hose clamps for tightness
4
Look for small cracks in hoses
5
Test purge solenoid valve
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
Hose clamps
Purge solenoid valve
Charcoal canister seal
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