P0447 Code: EVAP System Vent Control Circuit Open
🟢 Low severity · drivable
Safe to drive — it's an emissions circuit problem. Fix it before your next emissions test.
What P0447 means
The vent valve, which lets air into the fuel tank so vapors can be purged, isn't getting power because the circuit is open. The valve can't open, so the EVAP system can't vent properly.
Symptoms
- Check engine light is on
- Possible faint fuel smell
- Usually no driving symptoms
Common causes
- most common: Faulty vent valve solenoid
- common: Damaged wiring or loose connector at the valve
- less common: Blown fuse or bad relay
How to fix it
| Fix | DIY? | Typical cost |
|---|---|---|
| Inspect the wiring and connector and repair any damage | Yes | $20–100 |
| Test and replace the vent valve | Yes | $30–120 |
| Check the fuse and relay for the valve circuit | Yes | $5–20 |
Frequently asked questions
Can I drive with a P0447 code?
Yes. It's an emissions circuit problem and won't affect how the car drives. Fix it before your next emissions test.
What does P0447 mean?
The vent valve circuit is open, so the valve that lets air into the fuel tank isn't getting power.
How much does it cost to fix P0447?
Usually $30–120 for a new vent valve, plus a little more if wiring needs repair.
Related codes
P0448
P0448 Code: EVAP System Vent Control Circuit Shorted
P0446P0446 Code: Evaporative Emission Control System Vent Control Circuit Malfunction
P0444P0444 Code: EVAP System Purge Control Valve A Circuit Open
Updated 2026-08. This page is informational and not a substitute for professional diagnosis.