p0455
Easy Fix
Porsche · Sedans & Sports Cars
Evaporative Emission System Leak Detected (Gross Leak)
Quick Answer
Error code P0455 on your Porsche Sedans & Sports Cars means: Evaporative Emission System Leak Detected (Gross 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
Inspect fuel cap for proper sealing and damage
2
Visually inspect all EVAP hoses for cracks or disconnections
3
Check the charcoal canister for cracks or damage
4
Test the purge control solenoid valve for proper operation
5
Perform a smoke test on the EVAP system to locate any leaks
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 and connectors
Charcoal canister
Purge control solenoid valve
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