P0447: Evaporative Emission System Vent Control Circuit Open
2 vehicles · 2 makes · $40-$900 repair
Most Reported On
P0447 is an OBD-II diagnostic trouble code meaning “Evaporative Emission System Vent Control Circuit Open.” This code means the engine computer detected an electrical open (broken or disconnected circuit) in the control wiring for the EVAP system's vent valve, which lets fresh air into the charcoal canister that captures fuel vapors. Because the computer can no longer command the vent valve to open or close, it cannot properly seal the fuel system to test for vapor leaks. This is an emissions and self-test issue rather than a safety or driveability problem, so the car generally runs fine but will fail an emissions test. This code is most commonly reported on 2008-2013 Nissan Rogue, and 2009-2013 Infiniti FX50, with repair costs ranging from $40 to $900.
Common Causes
Typical Repair Cost
Based on 2 documented vehicle-specific issues. Actual cost depends on root cause and vehicle.
Diagnostic Tools
To diagnose P0447, you'll need an OBD-II scanner. Here are our recommendations at every price point.
ANCEL AD310 Classic OBD-II Scanner
by ANCEL
A simple, affordable code reader that reads and clears check engine codes. Great for quick diagnostics on any OBD-II vehicle (1996+).
- Read & clear engine codes
- View freeze frame data
- I/M readiness status
- No batteries or app needed
BlueDriver Pro Bluetooth Scanner
by BlueDriver
Bluetooth OBD-II scanner with a free companion app. Provides enhanced diagnostics, smog readiness, and repair reports sourced from a database of verified fixes.
- Enhanced diagnostics (ABS, SRS, transmission)
- Repair Reports with verified fixes
- Smog check readiness
- Free app (iOS & Android)
LAUNCH CRP123X OBD-II Scanner
by LAUNCH
A professional-grade handheld scanner that reads all four major systems (engine, transmission, ABS, SRS) with live data streaming and graphing.
- Engine, transmission, ABS, SRS diagnostics
- Live data stream & graphing
- AutoVIN for vehicle identification
- Free lifetime updates via Wi-Fi
Autel MaxiCOM MK808S Diagnostic Tool
by Autel
Shop-level diagnostic tablet with bi-directional control, active tests, and full system coverage. Ideal for serious DIYers and small shops.
- All-system diagnostics (25+ modules)
- Bi-directional control & active tests
- Oil reset, EPB, BMS, TPMS, injector coding
- 7-inch touchscreen with Android OS
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FAQ
What does P0447 mean?
P0447 stands for "Evaporative Emission System Vent Control Circuit Open." This code means the engine computer detected an electrical open (broken or disconnected circuit) in the control wiring for the EVAP system's vent valve, which lets fresh air into the charcoal canister that captures fuel vapors. Because the computer can no longer command the vent valve to open or close, it cannot properly seal the fuel system to test for vapor leaks. This is an emissions and self-test issue rather than a safety or driveability problem, so the car generally runs fine but will fail an emissions test.
What are the most common causes of P0447?
The most common causes of P0447 are: Faulty EVAP vent valve/solenoid (internal electrical failure), Damaged, corroded, or disconnected wiring to the vent solenoid, Bad or loose electrical connector at the vent valve, Open circuit or chafed wire in the EVAP harness, Blown fuse feeding the vent control circuit, Vent valve clogged with dirt or debris, PCM/ECM driver fault (rare). The specific cause varies by vehicle.
How much does it cost to fix P0447?
Repair costs for P0447 range from $40 to $900, depending on the vehicle and root cause.
Which vehicles are affected by P0447?
Au7o has documented P0447 across 2 vehicle models from 2 manufacturers: Infiniti, Nissan.
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.