P0447: How to Diagnose & Fix — Evaporative Emission System Vent Control Circuit Open
2 vehicles · 2 makes · $40-$900 repair
How to diagnose and fix P0447: most-reported vehicles
Ranked by owner reports. Each card gives the symptoms, how to confirm the cause, the fix, parts and sources for that vehicle.
Nissan Rogue · 2008–2013
Rogue owners commonly report EVAP system faults caused by a sticking vent control valve, contaminated canister, or related hose issues. The problem often shows up as a persistent check engine light and, in some cases, the gas pump repeatedly clicks off during refueling because the tank cannot vent properly. Nissan service literature for EVAP leak and vent valve diagnosis exists, and complaint/forum activity is consistent across this generation.
Common Symptoms
- Check engine light on
- Gas pump shuts off repeatedly while refueling
- Small or large EVAP leak codes
- Fuel odor near rear of vehicle
- Failed emissions inspection
How to Fix
Diagnosis includes smoke-testing the EVAP system, checking vent valve operation, inspecting the canister for saturation or debris, and verifying hose integrity near the rear of the vehicle. Repair may involve replacing the EVAP vent control valve, charcoal canister, damaged hoses, or corroded connectors, then clearing codes and confirming monitor completion.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
- Genuine Nissan EVAP canister vent-control valve 14935-JF02C
Not the engine-bay purge valve. The 2008-2010 drain-cut 14935-AM60B branch is excluded because its inspected OE listing was unavailable; confirm VIN and production date.
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Owner tips & cautions
- TipIf replacing the vent valve, inspect the canister and nearby hoses at the same time because debris or saturation can cause repeat failures.
Infiniti FX50 · 2009–2013
Owners occasionally report check-engine lights caused by EVAP system leaks, often related to the gas cap, purge control valve, vent valve, or associated hoses. These faults usually do not affect drivability much, but they can prevent emissions readiness and trigger recurring warning lights.
Common Symptoms
- Check engine light on
- Loose or worn gas cap
- Failed emissions inspection
- Occasional fuel vapor smell
- No major drivability change
How to Fix
Diagnosis starts with reading EVAP-related codes, inspecting the fuel cap seal, and smoke-testing the EVAP system for leaks. Repairs may be as simple as replacing the gas cap or may require a purge/vent solenoid and hose replacement; typical cost runs from about $40 to $450 depending on the fault.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
- Genuine Infiniti early-production fuel filler capOEMInfiniti 17251-1NC0B
The 2010-2011 overlap with 4BA0B reflects production/supersession changes; confirm VIN and cap/filler-neck configuration rather than choosing
- Genuine Infiniti current-production fuel filler capOEMInfiniti 17251-4BA0B
Confirm VIN/build because 2010-2011 overlaps the earlier 1NC0B branch.
- Genuine Infiniti VK50VE EVAP purge-control valveOEMInfiniti 14930-JA10D
It is not the canister vent valve; confirm VIN and connector.
- Genuine Infiniti EVAP canister vent-control valveOEMInfiniti 14935-JF02C
vent-valve branch after P0447 circuit and smoke/command testing proves the valve failed Fitment/availability: Infiniti 14935-JF02C supersedes the JF00A-E family and is cataloged for the 2009-2013 FX50 EVAP vent position. Test wiring and …
As an Amazon Associate, we earn from qualifying purchases; other part links may also earn au7o a commission. Confirm fitment by VIN before buying.
Owner tips & cautions
- TipDo a smoke test before replacing multiple EVAP parts; small hose leaks are easy to miss visually.
- TipClear the code only after tightening or replacing the cap and completing a few drive cycles.
Find P0447 by make
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P0447 code reference
General diagnostic-code context. The code alone does not confirm a cause for your vehicle; use the applicable issue card and its sources.
Frequently asked questions
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.