p0456
Easy Fix
Mitsubishi · SUVs
Evaporative Emission System Leak Detected (Small Leak)
Quick Answer
Error code P0456 on your Mitsubishi SUVs means: Evaporative Emission System Leak Detected (Small Leak). This is usually fixable — see the step-by-step guide below.
Affected Models
Applies to all models
Likely Causes
How to Fix It
1
Check and tighten fuel cap
2
Inspect fuel cap seal for damage
3
Check vacuum hoses for small cracks
4
Test fuel tank for minor leaks
5
Inspect canister purge valve operation
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
Vacuum hoses
Fuel tank sealant
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