P0449 is a generic circuit malfunction code for the EVAP vent valve solenoid. The ECU detected that the circuit is not operating within expected parameters but could not classify it as a specific open (P0447) or short (P0448). The most common causes are a failed solenoid, a corroded connector, or harness damage.
P0449 is a generic circuit malfunction code for the EVAP vent valve solenoid. The ECU detected that the circuit is not operating within expected parameters but could not classify it as a specific open (P0447) or short (P0448). The most common causes are a failed solenoid, a corroded connector, or harness damage.
P0449 est un code defaut lie a systeme evap, classe en gravite low. Lorsque le calculateur de ton vehicule detecte cette condition, il enregistre P0449 et allume le voyant moteur.
Si ton vehicule a declenche P0449, tu peux remarquer un ou plusieurs de ces symptomes :
Voici les causes les plus courantes de P0449, classees selon la probabilite qu'elles soient en cause :
En general oui, pour des trajets courts. P0449 is a general circuit fault on the EVAP vent valve and does not affect engine performance or safety. Drive normally, but expect a failed emissions inspection until repaired.
Suis ces etapes pour identifier la cause profonde de P0449 :
Les couts de reparation de P0449 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.
P0449 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 vehicles set P0449 frequently when the leak detection pump assembly fails. The LDP combines the vent valve and a small electric pump. Unlike a standalone vent valve, a full LDP assembly is 250 to 500 EUR in parts alone. Always test the LDP motor and the vent valve separately before condemning the assembly.
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
P0449 on the Mk5 and Mk6 Golf almost always traces to the N115 vent valve at the charcoal canister. Aftermarket replacements are available from Autodoc.de and kfzteile24.de for 30 to 50 EUR. The job is a 30-minute DIY with the rear wheel removed.
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 N115 vent valve with the VW Golf, but the harness routing on the A4 sedan is slightly different. Check the connector at the canister and the in-line connector under the rear seat. The latter is a known corrosion point in winter climates.
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
P0449 on the Focus Mk2 and Mk3 is usually a failed canister vent solenoid. Ford parts are widely available and the solenoid is one of the cheaper EVAP components in the market, typically 30 to 60 EUR aftermarket. DIY replacement requires removing the rear wheel and a wheel well liner.
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 P0449 ou indiquent des problemes connexes :
All three codes relate to the EVAP vent valve circuit. P0447 is an open circuit, P0448 is a short circuit, and P0449 is a generic malfunction the ECU could not classify as either. The diagnostic process is similar across all three: test the solenoid, inspect the wiring, and check the connector.
No. P0449 is specifically an electrical fault on the vent valve circuit. A bad fuel cap causes pressure or leak codes like P0440, P0442, P0455, or P0457. If P0449 appears alongside a fuel cap code, fix the electrical fault first because it can interfere with the cap test.
On most vehicles, expect 70 to 230 EUR total for a new vent valve including labour. On BMW and Mercedes models with a leak detection pump assembly, the full unit is 230 to 700 EUR. Cleaning a corroded connector can fix the code for under 40 EUR if the solenoid itself tests good.
If the fault is still present, P0449 typically returns within one to three drive cycles. The ECU tests the vent valve circuit during the EVAP readiness routine, which runs once per drive cycle under specific conditions (cold start, partial fuel tank, steady cruise).
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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