P0446 1999 Ford F150 Code - EVAP Control System Canister Vent Solenoid Circuit Malfunction
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 1999 Ford F150 indicates EVAP Control System Canister Vent Solenoid Circuit Malfunction.
- 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 1999 Ford F150 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 1999 Ford F150?
- 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 1999 Ford F150?
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
Before replacing any parts, try re-tighten the gas cap and clearing the code. If the cap or cap seal is damage replaced cap and clear the code.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0446 1999 Ford F150 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.
Need more information about the P0446 1999 Ford F150 code?
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Frequently Asked Questions about P0446 1999 Ford F150 Code
1. What are common symptoms of OBDII code P0446 in a 1999 Ford F150?
The most common symptoms include the Check Engine Light coming on, a strong fuel odor near the vehicle, and potential issues with the vehicle's fuel economy.
2. What does the OBDII code P0446 indicate in a 1999 Ford F150?
OBDII code P0446 in a 1999 Ford F150 specifically points to a malfunction in the EVAP Control System Canister Vent Solenoid Circuit.
3. What are possible causes of the EVAP Control System Canister Vent Solenoid Circuit malfunction in a 1999 Ford F150?
Possible causes include a faulty vent solenoid, damaged wiring or connectors in the circuit, a clogged vent solenoid, or a problem with the EVAP system's control module.
4. How can I diagnose the source of the P0446 code in my 1999 Ford F150?
You can start by visually inspecting the vent solenoid and its wiring for any signs of damage. Using an OBDII scanner, you can also perform a system test to pinpoint the exact location of the malfunction.
5. Can I continue driving my 1999 Ford F150 with the P0446 code?
While the vehicle may still be drivable with this code, it is important to address the issue promptly to prevent potential damage to the EVAP system and ensure proper vehicle performance.
6. How can I repair the EVAP Control System Canister Vent Solenoid Circuit in my 1999 Ford F150?
Repair methods may involve replacing the vent solenoid, repairing damaged wiring or connectors, clearing any blockages in the system, or resetting the EVAP system's control module.
7. Is it possible to reset the Check Engine Light after fixing the P0446 code in a 1999 Ford F150?
Yes, you can reset the Check Engine Light using an OBDII scanner once the underlying issue triggering the P0446 code has been successfully repaired.
8. Are there any preventive maintenance tips to avoid the P0446 code in a 1999 Ford F150?
Regularly inspecting the EVAP system components, ensuring the gas cap is tightly sealed, and promptly addressing any fuel-related issues can help prevent the occurrence of the P0446 code.
9. How long does it usually take to repair the EVAP Control System Canister Vent Solenoid Circuit issue in a 1999 Ford F150?
The repair time can vary depending on the exact cause of the malfunction, but it typically takes a couple of hours to diagnose and fix the problem.
10. Can a DIY enthusiast tackle the repair of the P0446 code in a 1999 Ford F150?
While some may attempt to fix the issue themselves, it is recommended to have a good understanding of automotive systems and access to the necessary tools and equipment before attempting the repair.
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