P0455 — Evaporative Emission Control System Leak Detected (gross leak)
Category: Powertrain Severity: Low
Updated:
DTC code P0455 means: Evaporative Emission Control System Leak Detected (gross leak). It falls under the "Powertrain" category, with an estimated severity of Low. Common causes include loose or faulty fuel cap, large EVAP leak and damaged EVAP hose; it's worth confirming the diagnosis before replacing parts.
Possible causes
- Loose or faulty fuel cap
- Large EVAP leak
- Damaged EVAP hose
- Faulty canister
Symptoms
- Check engine light
- Fuel smell
- No driving symptoms
How to diagnose it step by step
- Make sure the fuel cap is on and sealing.
- Check the canister and filler neck hoses.
- Test the vent valve.
- Do a smoke test if you can't find the leak.
How to fix it
Check the fuel cap and the EVAP system hoses and valves.
Estimated repair cost
$10–250 in most cases.
Frequently asked questions
What does DTC code P0455 mean?
Evaporative Emission Control System Leak Detected (gross leak).
Is code P0455 serious?
Severity Low. Usually a minor fault; check the causes listed.
Can I keep driving with code P0455?
Yes, no risk to the engine.
Related codes
P0456 P0453 P0457 P0452 P0449 P0447 P0446 P0443 P0442 P0441
Refine by car make
- Audi P0455: Large EVAP leak (fuel cap or hose).
- BMW P0455: Fuel cap or EVAP hose.
- Citroën P0455: Fuel cap or canister.
- Fiat P0455: Fuel cap or EVAP leak.
- Ford P0455: Fuel cap or large leak in EVAP hose.
- Honda P0455: Fuel cap or purge valve.
- Opel P0455: Fuel cap or leak in EVAP hose.
- Peugeot P0455: Fuel cap or canister.
- Renault P0455: Fuel cap or canister.
- Toyota P0455: Fuel cap or EVAP leak.
- Volkswagen P0455: Large EVAP leak (fuel cap or hose).
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