AutoCodes – Ford – P0451 2003 Ford F150

P0451 2003 Ford F150 Code - Evaporative Emission Control System Pressure Sensor Range/Performance

Quick Answer

The Evaporative Emission System (EVAP) control system pressure sensor detects pressure in the purge line. Common causes include Faulty Evaporative Emission System (EVAP) Pressure Sensor, Evaporative Emission System (EVAP) Pressure sensor harness is open or shorted, Evaporative Emission System (EVAP) Pressure sensor circuit poor electrical connection. 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
P0451 2003 Ford F150 indicates Evaporative Emission Control System Pressure Sensor Range/Performance.
Common causes
Common causes include Faulty Evaporative Emission System (EVAP) Pressure Sensor, Evaporative Emission System (EVAP) Pressure sensor harness is open or shorted, Evaporative Emission System (EVAP) Pressure sensor circuit poor electrical connection.
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 5,360
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Jun 14, 2020
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Code P0451 2003 Ford F150 Description

The Evaporative Emission System (EVAP) control system pressure sensor detects pressure in the purge line. The sensor output voltage to the Engine Control Module (ECM) increases as pressure increases. The EVAP control system pressure sensor is not used to control the engine system. It is used only for on board diagnosis.
OBDII Code P0451 2003 Ford F150 - Evaporative Emission Control System Pressure Sensor Range/Performance - AutoCodes.com
P0451 2003 Ford F150 Code - Evaporative Emission Control System Pressure Sensor Range/Performance

What are the Possible Causes of the DTC P0451 2003 Ford F150?

  • Faulty Evaporative Emission System (EVAP) Pressure Sensor
  • Evaporative Emission System (EVAP) Pressure sensor harness is open or shorted
  • Evaporative Emission System (EVAP) Pressure sensor circuit poor electrical connection
  • Faulty Engine Control Module (ECM)

How to Fix the DTC P0451 2003 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 is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0451 2003 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 P0451 2003 Ford F150 code?

Need more information on how to fix the P0451 2003 Ford F150 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0451 2003 Ford F150 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 P0451 2003 Ford F150 Code

1. What does OBDII code P0451 on a 2003 Ford F150 mean?

The code P0451 indicates a problem with the Evaporative Emission Control System Pressure Sensor Range/Performance.

2. What are the common symptoms of OBDII code P0451 on a Ford F150?

Common symptoms include the check engine light coming on, decreased fuel efficiency, and potential issues with the vehicle's emission control system.

3. What are the possible causes of OBDII code P0451 on a 2003 Ford F150?

Potential causes include a faulty evaporative emission control system pressure sensor, wiring issues, a damaged sensor connector, or a problem with the vehicle's PCM (powertrain control module).

4. How can I diagnose the OBDII code P0451 on my 2003 Ford F150?

Diagnosis typically involves using an OBDII scanner to retrieve the trouble code, checking the evaporative emission control system pressure sensor and its wiring for any visible damage, and performing a thorough inspection of the system.

5. How can I repair OBDII code P0451 on my Ford F150?

Repair options may include replacing the evaporative emission control system pressure sensor, repairing any damaged wiring or connectors, or resetting the vehicle's PCM after addressing the underlying issue.

6. Can I drive my Ford F150 with OBDII code P0451?

It is generally safe to drive the vehicle for a short period with the code P0451, but it is recommended to address the issue promptly to prevent potential damage to the emission control system and ensure optimal vehicle performance.

7. Will OBDII code P0451 cause my Ford F150 to fail an emissions test?

Yes, since the code P0451 relates to the evaporative emission control system, it may cause your vehicle to fail an emissions test due to increased emissions and improper functioning of this system.

8. How much does it typically cost to repair OBDII code P0451 on a 2003 Ford F150?

The cost of repairing OBDII code P0451 can vary depending on the exact cause of the issue, but it may range from $100 to $300 for parts and labor.

9. Are there any preventive measures to avoid OBDII code P0451 on my Ford F150?

Regular maintenance and inspections of the evaporative emission control system, including checking the sensor and its wiring, can help prevent issues that may trigger OBDII code P0451.

10. Can I reset the check engine light after repairing OBDII code P0451 on my Ford F150?

Once the underlying issue causing the code P0451 is repaired, you can reset the check engine light using an OBDII scanner to clear the trouble code and ensure it does not reappear.

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