P1446 Code - EVAP Canister Vent Control Valve Close
Quick Answer
The P1446 code indicates a problem with the EVAP (Evaporative Emission Control System) Canister Vent Control Valve, specifically that it is not closing properly. Common causes include Faulty Canister Vent Control Valve: The most common cause of the P1446 code is a malfunctioning EVAP Canister Vent Control Valve, Vacuum Leaks: Any leaks in the vacuum lines connected to the EVAP system can also trigger this code, Wiring Issues: Damage or corrosion to the wiring or connectors related to the Canister Vent Control Valve can cause communication errors. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P1446 indicates EVAP Canister Vent Control Valve Close.
- Common causes
- Common causes include Faulty Canister Vent Control Valve: The most common cause of the P1446 code is a malfunctioning EVAP Canister Vent Control Valve, Vacuum Leaks: Any leaks in the vacuum lines connected to the EVAP system can also trigger this code, Wiring Issues: Damage or corrosion to the wiring or connectors related to the Canister Vent Control Valve can cause communication errors.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
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Code P1446 Description
The P1446 code indicates a problem with the EVAP (Evaporative Emission Control System) Canister Vent Control Valve, specifically that it is not closing properly. The EVAP system helps to capture and store fuel vapors from the fuel tank to prevent them from being released into the atmosphere. The Canister Vent Control Valve is responsible for controlling the flow of vapors into the engine. If this valve fails to close properly, it can lead to fuel vapors escaping, causing issues with emissions and potentially affecting the vehicle's overall performance.
Common Causes of P1446
- Faulty Canister Vent Control Valve: The most common cause of the P1446 code is a malfunctioning EVAP Canister Vent Control Valve.
- Vacuum Leaks: Any leaks in the vacuum lines connected to the EVAP system can also trigger this code.
- Wiring Issues: Damage or corrosion to the wiring or connectors related to the Canister Vent Control Valve can cause communication errors.
- EVAP System Clogs: Blockages in the EVAP system, such as a clogged vent or charcoal canister, can lead to issues with the valve's operation.
Symptoms of P1446
- Check Engine Light: The most common symptom associated with the P1446 code is the illumination of the Check Engine Light on the dashboard.
- Reduced Fuel Efficiency: A failing EVAP Canister Vent Control Valve can lead to decreased fuel efficiency as fuel vapors are not properly recirculated.
- Strong Fuel Odor: If fuel vapors are escaping due to the valve not closing properly, you may notice a strong fuel odor around the vehicle.
- Rough Idle: An improperly functioning EVAP system can also cause rough idling or stalling of the engine.
How to Fix P1446
- Diagnose the Issue: Use a scan tool to retrieve the specific code and perform a visual inspection of the EVAP system components.
- Test Canister Vent Control Valve: Test the functionality of the Canister Vent Control Valve using a multimeter to determine if it is closing properly.
- Check for Leaks: Inspect the vacuum lines for any leaks or damage that could be affecting the valve's operation.
- Replace Faulty Parts: If the Canister Vent Control Valve is found to be faulty, replace it with a new one. Ensure all connections are secure and the system is properly sealed.
- Clear Codes: After completing the repair, clear the diagnostic trouble codes and test drive the vehicle to ensure the issue has been resolved.
Cost to Fix P1446
The cost of repairing the EVAP Canister Vent Control Valve can vary depending on the make and model of the vehicle, as well as the specific parts needed for the repair. On average, the cost of parts for this repair can range from $100 to $300, while labor costs may add an additional $100 to $200. As mentioned earlier, labor rates at auto repair shops can vary, so it's recommended to obtain quotes from local shops for a more accurate estimate.
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Code P1446 Information for Specific Makes
- P1446 Audi — Catalyst Temperature Circuit Short To Ground
- P1446 BMW — Diagnostic Module Tank Leakage Pump Control Circuit Signal High
- P1446 Honda — Battery Module Individual Voltage Input Deviation
- P1446 Infiniti — EVAP Canister Vent Control Valve Close
- P1446 KIA — Leak Detection Module Solenoid Valve Circuit Fault
- P1446 MINI — Diagnostic Module Tank Leakage Pump Control Circuit Signal High
- P1446 Nissan — EVAP Canister Vent Control Valve Close
- P1446 Subaru — Fuel Tank Sensor Control Valve Circuit Low
- P1446 Volkswagen — Catalyst Temperature Circuit Short To Ground
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