P0455 means the engine control unit has detected a large leak in the evaporative emission system. This is a more significant leak than P0442, often caused by a missing fuel cap, a completely disconnected EVAP hose, or a cracked charcoal canister. The large leak size usually makes it easier to find.
P0455 means the engine control unit has detected a large leak in the evaporative emission system. This is a more significant leak than P0442, often caused by a missing fuel cap, a completely disconnected EVAP hose, or a cracked charcoal canister. The large leak size usually makes it easier to find.
P0455 est un code defaut lie a systeme evap, classe en gravite moderate. Lorsque le calculateur de ton vehicule detecte cette condition, il enregistre P0455 et allume le voyant moteur.
Si ton vehicule a declenche P0455, tu peux remarquer un ou plusieurs de ces symptomes :
Voici les causes les plus courantes de P0455, classees selon la probabilite qu'elles soient en cause :
En general oui, pour des trajets courts. A large EVAP leak does not affect driveability, but it means significant fuel vapour is escaping. Check the fuel cap immediately. Repair before your next emissions inspection.
Suis ces etapes pour identifier la cause profonde de P0455 :
Les couts de reparation de P0455 varient selon la cause profonde et ton vehicule. Voici des estimations courantes :
Prix estimes au March 2026. Les couts varient selon la region, le vehicule et le garage.
P0455 se comporte differemment selon ton vehicule. Selectionne ta voiture ci-dessous pour des causes propres au modele, les problemes connus et des estimations de couts ajustees :
2006-2024
The Corsa D and E have the charcoal canister mounted near the rear axle where it is exposed to road debris. Cracks in the canister housing are a known cause of P0455. The fuel cap uses a simple screw design that can lose its seal after frequent use.
Couts estimes pour les proprietaires de Opel Corsaajuste a la baisse par rapport a la moyenne en raison du prix des pieces specifiques a Opel
Prix estimes au March 2026. Les couts varient selon la region, le vehicule et le garage.
2008-2023
The Fiesta Mk7 has EVAP hoses routed along the underfloor near the fuel tank that can be damaged during service or by road debris. The purge valve on the 1.0 EcoBoost is mounted on top of the engine and is easy to test and replace.
Couts estimes pour les proprietaires de Ford Fiestaajuste a la baisse par rapport a la moyenne en raison du prix des pieces specifiques a Ford
Prix estimes au March 2026. Les couts varient selon la region, le vehicule et le garage.
2005-2024
The Polo shares many EVAP components with the VW Golf. The N80 purge valve is a common failure point. On the 1.2 TSI and 1.4 TSI, the EVAP lines near the fuel tank can become brittle in cold climates, leading to cracks that produce large leaks.
2007-2024
The Fabia uses VW Group EVAP system components. The charcoal canister is located near the rear wheel arch and can suffer damage from road salt and debris. A loose fuel cap after refuelling is statistically the most common cause of P0455 on this model.
Couts estimes pour les proprietaires de Skoda Fabiaajuste a la baisse par rapport a la moyenne en raison du prix des pieces specifiques a Skoda
Prix estimes au March 2026. Les couts varient selon la region, le vehicule et le garage.
Ces codes apparaissent souvent avec P0455 ou indiquent des problemes connexes :
It is not mechanically harmful and will not damage your engine. However, a large EVAP leak means significant fuel vapour is escaping into the atmosphere. The check engine light will cause an automatic failure at any EU vehicle inspection.
If the cap was loose or missing, yes. Tighten it until it clicks and clear the code. The ECU will re-test the system over the next few drive cycles. If the code returns, there is an additional leak beyond the cap.
The ECU categorises leaks by size. P0442 is a small leak (equivalent to a pinhole), while P0455 is a large leak (equivalent to a 1mm or larger opening). Large leaks are usually easier to find because they often involve a disconnected hose or missing cap.
The most likely reason is that the fuel cap was not tightened properly after refuelling. On some vehicles, overfilling the tank (topping off past the first click of the nozzle) can also saturate the charcoal canister, triggering EVAP codes.
If the cause is a fuel cap, the fix costs 10 to 40 EUR. A hose replacement runs 40 to 170 EUR. A charcoal canister replacement is 120 to 480 EUR. Start with the cheapest possibility first, as the fuel cap is the culprit in a large percentage of cases.
EVAP leak causing a check engine light? P0442, P0455, P0456 explained. Start with the gas cap. Causes, diagnosis, and repair costs in euros.
Learn how OBD2 works, find the port in your car, understand diagnostic trouble codes, know which problems you can fix yourself, and when to see a mechanic.
A check engine light with no symptoms can still mean a fault that costs you later. Read the code yourself for 15 euros to find out if runs fine is really fine.
Worried your mechanic is overcharging or inventing repairs? Read the fault code yourself first, get an itemised quote, and ask for the old parts back.
Branche un adaptateur OBD2 Bluetooth standard, scanne les codes et obtiens un diagnostic par IA avec niveaux de gravite et estimations des couts de reparation.
Telecharger Skanyx