p0455
Easy Fix
Porsche · SUVs
Evaporative Emission System Leak Detected (Large Leak)
Quick Answer
Error code P0455 on your Porsche SUVs means: Evaporative Emission System Leak Detected (Large Leak). This is usually fixable — see the step-by-step guide below.
Affected Models
Likely Causes
How to Fix It
1
Check and tighten fuel cap
2
Inspect all vacuum hoses for cracks
3
Examine charcoal canister for damage
4
Smoke test the fuel system
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
Charcoal canister
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