p0456
Easy Fix
Mazda · SUVs & Crossovers
EVAP System Leak Detected (Very Small Leak)
Quick Answer
Error code P0456 on your Mazda SUVs & Crossovers means: EVAP System Leak Detected (Very Small Leak). This is usually fixable — see the step-by-step guide below.
Affected Models
Likely Causes
How to Fix It
1
Tighten or replace fuel cap
2
Visually inspect all EVAP hoses
3
Perform smoke test to locate small leak
4
Test solenoid valve operation
5
Replace components as identified
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 hoses
Purge solenoid valve
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