p0456
Easy Fix
Infiniti · Sedans
Evaporative Emission Control System Leak Detected (Small)
Quick Answer
Error code P0456 on your Infiniti Sedans means: Evaporative Emission Control System Leak Detected (Small). This is usually fixable — see the step-by-step guide below.
Affected Models
Applies to all models
Likely Causes
How to Fix It
1
Inspect and tighten fuel cap
2
Check EVAP hose connections visually
3
Use smoke machine to locate small leak
4
Replace damaged EVAP hoses
5
Test purge control solenoid
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
EVAP hose
Purge control solenoid
Hose clamps
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