AutoCodes – Ford – P0451 2001 Ford F150

P0451 2001 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 2001 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 2,819
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 2001 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 2001 Ford F150 - Evaporative Emission Control System Pressure Sensor Range/Performance - AutoCodes.com
P0451 2001 Ford F150 Code - Evaporative Emission Control System Pressure Sensor Range/Performance

What are the Possible Causes of the DTC P0451 2001 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 2001 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 2001 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 2001 Ford F150 code?

Need more information on how to fix the P0451 2001 Ford F150 code? Get Access to Factory Service Manuals

Need Help with the Code?

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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 P0451 2001 Ford F150 Code

1. What are common symptoms of OBDII code P0451 on a 2001 Ford F150?

- Common symptoms include the check engine light illuminating, issues with fuel efficiency, and potential problems with the vehicle's evaporative emission control system.

2. What does the OBDII code P0451 mean for a 2001 Ford F150?

- OBDII code P0451 indicates a fault with the evaporative emission control system pressure sensor, specifically related to a range/performance issue.

3. What are possible causes of OBDII code P0451 on a 2001 Ford F150?

- Possible causes include a faulty evaporative emission control system pressure sensor, wiring issues, a vacuum leak in the system, or a problem with the fuel tank pressure sensor.

4. How can I diagnose the cause of OBDII code P0451 on my 2001 Ford F150?

- Diagnosing the issue typically involves checking the pressure sensor and its wiring for any visible damage, testing the sensor's functionality, and inspecting the evaporative emission control system for leaks.

5. Can OBDII code P0451 on a 2001 Ford F150 cause any other problems besides the check engine light?

- Yes, if left unresolved, issues with the evaporative emission control system can affect the vehicle's emissions output, fuel efficiency, and overall performance.

6. How can I repair OBDII code P0451 on my 2001 Ford F150?

- Repair options may include replacing the evaporative emission control system pressure sensor, repairing any damaged wiring, fixing vacuum leaks, or addressing issues with the fuel tank pressure sensor.

7. Is it safe to continue driving my 2001 Ford F150 with OBDII code P0451?

- It is generally not recommended to ignore the issue, as it can lead to further problems with the vehicle's emissions system and potentially impact performance. It is best to address the problem as soon as possible.

8. Can OBDII code P0451 on a 2001 Ford F150 be triggered by a loose gas cap?

- While a loose gas cap can sometimes trigger a related code like P0456 (small EVAP leak), it is less likely to cause OBDII code P0451, which is specifically related to the pressure sensor's range/performance.

9. How much does it typically cost to repair OBDII code P0451 on a 2001 Ford F150?

- The cost of repairs can vary depending on the exact cause of the issue, but it may involve sensor replacement, wiring repairs, or system diagnostics, with costs ranging from $100 to $300 or more.

10. Can resetting the check engine light resolve OBDII code P0451 on a 2001 Ford F150?

- Resetting the check engine light may temporarily turn it off, but if the underlying issue causing code P0451 is not addressed, the light is likely to come back on once the problem is detected again.

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