P0446 Ford Code - EVAP System Vent Control Circuit
Quick Answer
The Evaporative System (EVAP) canister vent control valve is located on the EVAP canister and is used to seal the canister vent. Common causes include Missing Fuel cap, Incorrect fuel filler cap used, Fuel filler cap remains open or fails to close. Severity is Low - monitor the vehicle and repair when practical. The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.
- What it means
- P0446 Ford indicates EVAP System Vent Control Circuit .
- Common causes
- Common causes include Missing Fuel cap, Incorrect fuel filler cap used, Fuel filler cap remains open or fails to close.
- Severity
- Low - monitor the vehicle and repair when practical.
- Can I drive?
- The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.
Code P0446 Ford Description
This solenoid valve responds to signals from the Engine Control Module (ECM). When the ECM sends an ON signal, the coil in the solenoid valve is energized. A plunger will then move to seal the canister vent. The ability to seal the vent is necessary for the on board diagnosis of other evaporative emission control system components.
This solenoid valve is used only for diagnosis, and usually remains opened.
What are the Possible Causes of the DTC P0446 Ford?
- Missing Fuel cap
- Incorrect fuel filler cap used
- Fuel filler cap remains open or fails to close
- Foreign matter caught in fuel filler cap
- Vent control valve harness is open or shorted
- Vent control valve circuit poor electrical connection
- Faulty vent control valve
How to Fix the DTC P0446 Ford?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
Code Tech Notes
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0446 Ford code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Information for Specific Ford Models
- P0446 1997 Ford F150 — EVAP Control System Canister Vent Solenoid Circuit Malfunction
- P0446 1998 Ford F150 — EVAP Control System Canister Vent Solenoid Circuit Malfunction
- P0446 1999 Ford F150 — EVAP Control System Canister Vent Solenoid Circuit Malfunction
- P0446 2000 Ford F150 — EVAP Control System Canister Vent Solenoid Circuit Malfunction
- P0446 2001 Ford F150 — EVAP Control System Canister Vent Solenoid Circuit Malfunction
- P0446 2002 Ford F150 — EVAP Control System Canister Vent Solenoid Circuit Malfunction
- P0446 2003 Ford F150 — EVAP Control System Canister Vent Solenoid Circuit Malfunction
- P0446 2006 Ford Fusion — EVAP System Vent Control Circuit
- P0446 2007 Ford Fusion — EVAP System Vent Control Circuit
- P0446 2008 Ford Fusion — EVAP System Vent Control Circuit
- P0446 2009 Ford Fusion — EVAP System Vent Control Circuit
- P0446 2010 Ford Fusion — EVAP System Vent Control Circuit
- P0446 2011 Ford Fusion — EVAP System Vent Control Circuit
- P0446 2012 Ford Fusion — EVAP System Vent Control Circuit
Frequently Asked Questions about P0446 Ford Code
1. What are the common symptoms of an OBDII code P0446 in a Ford vehicle?
- Common symptoms include the check engine light coming on, a gas cap warning light, and potential issues with the vehicle's fuel economy.
2. What are the possible causes of an OBDII code P0446 related to the EVAP system vent control circuit in a Ford car?
- Possible causes include a faulty vent control valve, damaged wiring or connectors, a stuck vent valve, or a malfunctioning charcoal canister.
3. How can I diagnose an OBDII code P0446 in my Ford vehicle?
- Diagnosis typically involves using an OBDII scanner to retrieve the specific code, checking the integrity of the gas cap, inspecting the EVAP system components for damage, and testing the vent control valve.
4. Can a loose gas cap trigger an OBDII code P0446 in a Ford car?
- Yes, a loose or improperly sealed gas cap can cause the EVAP system to detect a leak and trigger the P0446 code. Ensuring the gas cap is tightened properly is a good first step in diagnosing the issue.
5. How can I repair an OBDII code P0446 in a Ford vehicle related to the EVAP system vent control circuit?
- Repair options may include replacing the vent control valve, repairing or replacing damaged wiring or connectors, checking and cleaning the charcoal canister, and clearing the code with an OBDII scanner.
6. Is it safe to continue driving my Ford vehicle with an OBDII code P0446 present?
- While the vehicle may still be safe to drive in the short term, it is recommended to address the issue promptly to prevent potential damage to the EVAP system and ensure optimal vehicle performance.
7. Can a DIY enthusiast repair an OBDII code P0446 in a Ford car, or is professional help recommended?
- Depending on the individual's mechanical skills and access to tools, some DIY enthusiasts may be able to address the P0446 code themselves by following repair guides and utilizing basic diagnostic equipment.
8. Will resetting the check engine light clear an OBDII code P0446 in a Ford vehicle?
- Resetting the check engine light may temporarily clear the code, but if the underlying issue causing the P0446 code is not addressed, the check engine light is likely to come back on.
9. How long does it typically take to repair an OBDII code P0446 in a Ford car at a mechanic's shop?
- The repair time can vary depending on the specific cause of the P0446 code, but it may take anywhere from 1 to 3 hours for a mechanic to diagnose and repair the issue.
10. Are there any preventative maintenance tips to help avoid an OBDII code P0446 related to the EVAP system vent control circuit in a Ford vehicle?
- Regularly checking and tightening the gas cap, performing routine inspections of the EVAP system components, and addressing any small issues promptly can help prevent the occurrence of the P0446 code.
Discuss the causes and fixes for P0446 Ford OBDII Code
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2011 f150 code po446 evap fuel fill cap. has no cap just a door. engine light on have not replaced any parts
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