AutoCodes – Ford – P2451 Ford

P2451 Ford Code - Evaporative Emission System Switching Valve Stuck Closed

Quick Answer

The Engine Control Module monitors the Evaporative Emission System Switching Valve. Common causes include Faulty Evaporative Emission System Switching Valve, Evaporative Emission System Switching Valve harness is open or shorted, Evaporative Emission System Switching Valve circuit poor electrical connection. 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: P2451 Ford indicates Evaporative Emission System Switching Valve Stuck Closed.
Common causes: Common causes include Faulty Evaporative Emission System Switching Valve, Evaporative Emission System Switching Valve harness is open or shorted, Evaporative Emission System Switching Valve circuit poor electrical connection.
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 Popularity 5,993

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jan 14, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P2451 Ford Description

The Engine Control Module monitors the Evaporative Emission System Switching Valve. The OBDII code is set when the Evaporative Emission System Switching Valve is out factory specifications.

OBDII Code P2451 Ford - Evaporative Emission System Switching Valve Stuck Closed - AutoCodes.com — P2451 Ford Code - Evaporative Emission System Switching Valve Stuck Closed

What does this mean?

What are the Possible Causes of the DTC P2451 Ford?

Faulty Evaporative Emission System Switching Valve
Evaporative Emission System Switching Valve harness is open or shorted
Evaporative Emission System Switching Valve circuit poor electrical connection

How to Fix the DTC P2451 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.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P2451 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.

Need more information about the P2451 Ford code?

Need more information on how to fix the P2451 Ford code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P2451 Ford code diagnosed by a professional: Find a repair shop in your area

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 P2451 Ford Code

1. What does the OBDII code P2451 for a Ford mean?

The code P2451 indicates a problem with the Evaporative Emission System Switching Valve being stuck closed in a Ford vehicle.

2. What are the common symptoms of a P2451 code in a Ford?

Common symptoms of the P2451 code include a check engine light illuminated on the dashboard, decreased fuel efficiency, and potential issues with the vehicle's emissions system.

3. What are the possible causes of the Evaporative Emission System Switching Valve being stuck closed?

The Evaporative Emission System Switching Valve can get stuck closed due to a faulty valve, wiring issues, a vacuum leak, or a problem with the vehicle's PCM (Powertrain Control Module).

4. How can I diagnose the P2451 code in my Ford?

Diagnosing the P2451 code typically involves using an OBDII scanner to retrieve the code, inspecting the switching valve and related components for damage or blockages, and testing the electrical connections for proper voltage.

5. Can I drive my Ford with a P2451 code?

It is generally not recommended to drive your Ford with a P2451 code present, as it can lead to further damage to the emissions system and potentially affect the vehicle's performance.

6. How can I repair a P2451 code in my Ford?

Repairing a P2451 code may involve replacing the Evaporative Emission System Switching Valve, repairing any damaged wiring or vacuum lines, or resetting the PCM after fixing the underlying issue.

7. Is the P2451 code a serious problem in a Ford?

While the P2451 code may not cause immediate harm to your Ford, it is important to address the issue promptly to ensure proper emissions control and prevent potential damage to other components.

8. Can I reset the P2451 code in my Ford without fixing the issue?

Resetting the P2451 code without fixing the underlying problem may temporarily turn off the check engine light, but the code is likely to reappear until the issue is properly addressed.

9. How much does it cost to repair a P2451 code in a Ford?

The cost of repairing a P2451 code in a Ford can vary depending on the specific cause of the issue, the labor rates in your area, and whether you choose to repair the vehicle yourself or take it to a professional mechanic.

10. How long does it take to repair a P2451 code in a Ford?

The time required to repair a P2451 code in a Ford can vary depending on the extent of the issue, the availability of parts, and your level of experience with automotive repairs. It can range from a few hours to a day or more.