P0449 on a Volvo: Causes, Fixes & Repair Cost
🟢 Low severity · drivable
Safe to drive — this is an EVAP vent valve circuit fault, not an engine problem. Fix it before your next emissions test.
What P0449 means on a Volvo
On a Volvo, P0449 means the engine computer sees an electrical problem in the EVAP vent valve circuit. The vent valve opens to let fresh air into the charcoal canister so fuel vapors can be purged. The car drives normally, and the check engine light is usually the only sign.
Is P0449 common on Volvos?
P0449 appears on Volvos like the XC60, XC90, S60, and V60, most often on older or higher-mileage cars. The vent valve is mounted on the charcoal canister near the fuel tank, where wiring can corrode or chafe. A failing vent valve or a bad connection is the usual cause.
Commonly reported on: XC60, XC90, S60, V60.
Symptoms
- Check engine light is on
- Possible trouble filling the fuel tank
- Usually no driving symptoms
Common causes
- most common: Faulty EVAP vent valve
- common: Corroded or chafed vent valve wiring
- common: Loose vent valve connector
- less common: Blocked or damaged charcoal canister
How to fix it
| Fix | DIY? | Typical cost |
|---|---|---|
| Replace the EVAP vent valve | Yes | $30–150 |
| Clean and reseat the vent valve connector | Yes | $5–20 |
| Repair damaged vent valve wiring | Mechanic | $50–150 |
Frequently asked questions
Other common Volvo codes
P0449 on other brands
Looking for the full (non-brand-specific) guide? See the P0449 code page →
Browse all Volvo codes: Volvo hub →
Updated 2026-08. This page is informational and not a substitute for professional diagnosis.