P0457 means the ECU detected an evaporative system leak consistent with a loose, missing, or damaged fuel cap. The code is specifically tuned to flag cap-sized leaks before flagging generic small (P0442) or large (P0455) leaks. The first thing to check is always the cap itself.
P0457 means the ECU detected an evaporative system leak consistent with a loose, missing, or damaged fuel cap. The code is specifically tuned to flag cap-sized leaks before flagging generic small (P0442) or large (P0455) leaks. The first thing to check is always the cap itself.
P0457 est un code defaut lie a systeme evap, classe en gravite low. Lorsque le calculateur de ton vehicule detecte cette condition, il enregistre P0457 et allume le voyant moteur.
Si ton vehicule a declenche P0457, tu peux remarquer un ou plusieurs de ces symptomes :
Voici les causes les plus courantes de P0457, classees selon la probabilite qu'elles soient en cause :
En general oui, pour des trajets courts. P0457 is specifically a fuel cap leak code and has no effect on engine performance or safety. Tighten the cap immediately and drive normally. The check engine light will cause an automatic fail at any EU emissions inspection until the code clears.
Suis ces etapes pour identifier la cause profonde de P0457 :
Les couts de reparation de P0457 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.
P0457 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 :
2005–2024
BMW E90 uses a screw-type fuel cap that should click multiple times when properly tightened. Newer F30 and G20 models often use a capless filler with a flapper assembly. If the flapper does not seal properly, P0457 can set even though there is no visible cap. Inspect the flapper carefully and clean any debris.
Couts estimes pour les proprietaires de BMW 3 Seriesajuste a la hausse par rapport a la moyenne en raison du prix des pieces specifiques a BMW
Prix estimes au March 2026. Les couts varient selon la region, le vehicule et le garage.
2005–2024
VW Golf uses a bayonet-style fuel cap that must be turned until it clicks. Owners frequently report P0457 after a quick refuel where they forgot to twist the cap to the click point. Replacement OEM caps from VW or aftermarket from Autodoc.de cost 15 to 30 EUR.
Couts estimes pour les proprietaires de Volkswagen Golfajuste a la hausse par rapport a la moyenne en raison du prix des pieces specifiques a Volkswagen
Prix estimes au March 2026. Les couts varient selon la region, le vehicule et le garage.
2005–2024
B7 and B8 A4 share the bayonet-style cap with the VW Golf. P0457 is one of the most common codes set on these vehicles, almost always due to operator error at the pump. Train all drivers to twist the cap until it audibly clicks at least twice.
Couts estimes pour les proprietaires de Audi A4ajuste a la hausse par rapport a la moyenne en raison du prix des pieces specifiques a Audi
Prix estimes au March 2026. Les couts varient selon la region, le vehicule et le garage.
2005–2024
Ford Focus Mk2 uses a standard screw-type cap with a tether. Mk3 introduced the Easy Fuel capless system on many European trims, eliminating the cap entirely. On capless models, P0457 typically traces to debris stuck in the flapper or a damaged flapper spring. Cleaning often resolves it.
Couts estimes pour les proprietaires de Ford Focusajuste 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.
Ces codes apparaissent souvent avec P0457 ou indiquent des problemes connexes :
After tightening the cap or replacing it, the ECU needs 3 to 5 complete drive cycles to retest the EVAP system and clear the code. A drive cycle includes a cold start, mixed driving over 15 to 20 minutes, and shutdown. You can also clear it manually with a scan tool to confirm the fix immediately.
Yes. P0457 is specifically tuned to the leak size associated with a loose or missing fuel cap (typically a medium-size leak). The ECU sets P0457 rather than the generic P0455 (large leak) or P0442 (small leak) when the leak profile matches a cap-sized opening, giving the driver a more specific hint.
If you've already tightened the cap and the light returns, the rubber seal is most likely worn, cracked, or contaminated with fuel residue. Replacement caps cost 10 to 40 EUR and take seconds to install. Always buy a manufacturer-spec or OEM-equivalent cap, not the cheapest universal option.
Yes, indirectly. Overfilling the tank past the first click of the fuel nozzle can saturate the charcoal canister with liquid fuel. A saturated canister cannot hold vacuum properly during EVAP self-tests and can set leak codes including P0457. The fix is to stop topping off and let the system self-recover over several drive cycles.
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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.
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