AutoCodes – Ford – P0446 1997 Ford F150

P0446 1997 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 1997 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.

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Code Popularity 5,612

How popular is this code, among other codes? Low

Repair Importance Level

Low (Monitor) (1 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jun 14, 2020

Description
Step-by-Step Diagnostic Guide
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P0446 1997 Ford F150 Description

The Evaporative System (EVAP) canister vent control valve is located on the EVAP canister and is used to seal the canister vent.
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.

OBDII Code P0446 1997 Ford F150 - EVAP Control System Canister Vent Solenoid Circuit Malfunction - AutoCodes.com — P0446 1997 Ford F150 Code - EVAP Control System Canister Vent Solenoid Circuit Malfunction

What does this mean?

What are the Possible Causes of the DTC P0446 1997 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 1997 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.

What does this mean?

Code Tech Notes

Monitors the canister vent (CV) solenoid circuit for an electrical failure. The test fails when the signal moves outside the minimum or maximum allowable calibrated parameters for a specified canister vent duty cycle by PCM command.

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 1997 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.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P0446 1997 Ford F150 Code

1. What is OBDII code P0446 for a 1997 Ford F150?

The OBDII code P0446 for a 1997 Ford F150 indicates a malfunction in the EVAP Control System Canister Vent Solenoid Circuit.

2. What are common symptoms of a P0446 code in a 1997 Ford F150?

Common symptoms of a P0446 code in a 1997 Ford F150 may include the check engine light coming on, rough idling, and potential fuel odor.

3. What are possible causes of a P0446 code in a 1997 Ford F150?

Possible causes of a P0446 code in a 1997 Ford F150 include a faulty canister vent solenoid, a damaged wiring harness, or a clogged vent line.

4. How can I diagnose a P0446 code in a 1997 Ford F150?

To diagnose a P0446 code in a 1997 Ford F150, you can start by checking the canister vent solenoid, inspecting the wiring for any damage, and ensuring the vent line is clear of obstructions.

5. Can I still drive my 1997 Ford F150 with a P0446 code?

It is not recommended to drive your 1997 Ford F150 with a P0446 code for an extended period as it may lead to potential issues with the vehicle's emissions system.

6. How do I repair a P0446 code in a 1997 Ford F150?

Repairing a P0446 code in a 1997 Ford F150 may involve replacing the canister vent solenoid, repairing or replacing damaged wiring, and clearing any obstructions in the vent line.

7. Can I reset the P0446 code in my 1997 Ford F150?

You can reset the P0446 code in your 1997 Ford F150 using an OBDII scanner after the underlying issue has been diagnosed and repaired.

8. How much does it cost to fix a P0446 code in a 1997 Ford F150?

The cost to fix a P0446 code in a 1997 Ford F150 can vary depending on the specific issue, but it may range from around $100 to $300 for parts and labor.

9. Are there any maintenance tips to prevent a P0446 code in a 1997 Ford F150?

Regularly checking and maintaining the EVAP system components, such as the canister vent solenoid and vent line, can help prevent a P0446 code in a 1997 Ford F150.

10. Can a DIY enthusiast repair a P0446 code in a 1997 Ford F150?

A DIY enthusiast with the necessary tools and knowledge may be able to repair a P0446 code in a 1997 Ford F150 by following repair guides and instructions specific to the issue.