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Engine-Codes – Ford – P0455 1997 Ford F150

P0455 1997 Ford F150 Code - Evaporative Emission Control System Leak Detected Gross Leak

Quick Answer

The P0455 code for a 1997 Ford F150 indicates that the Evaporative Emission Control System has detected a gross leak. Common causes include Loose or missing gas cap, Damaged or disconnected hoses in the Evaporative Emission Control System, Faulty purge valve. 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
P0455 1997 Ford F150 indicates Evaporative Emission Control System Leak Detected Gross Leak.
Common causes
Common causes include Loose or missing gas cap, Damaged or disconnected hoses in the Evaporative Emission Control System, Faulty purge valve.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 11, 2024
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Code P0455 1997 Ford F150 Description

The P0455 code for a 1997 Ford F150 indicates that the Evaporative Emission Control System has detected a gross leak. This system is responsible for capturing and storing fuel vapors from the fuel tank and preventing them from escaping into the atmosphere. When a gross leak is detected, it means that there is a significant breach in the system, allowing fuel vapors to escape.

OBDII Code P0455 1997 Ford F150 - Evaporative Emission Control System Leak Detected Gross Leak
P0455 1997 Ford F150 Code - Evaporative Emission Control System Leak Detected Gross Leak

Common Causes of P0455 1997 Ford F150

  1. Loose or missing gas cap
  2. Damaged or disconnected hoses in the Evaporative Emission Control System
  3. Faulty purge valve
  4. Issues with the charcoal canister
  5. Malfunctioning Evaporative Emission Control System pressure sensor

Symptoms of P0455 1997 Ford F150

  1. Check Engine Light illuminated
  2. Strong fuel odor near the vehicle
  3. Decreased fuel efficiency
  4. Hissing or hissing noises coming from the fuel tank area
  5. Failed emissions test

How to Fix P0455 1997 Ford F150

  1. Inspect the gas cap and ensure it is properly tightened or replace it if damaged.
  2. Check all hoses in the Evaporative Emission Control System for leaks or damage and replace as necessary.
  3. Test the purge valve and replace it if faulty.
  4. Inspect the charcoal canister for damage and replace if needed.
  5. Clear the diagnostic trouble codes and reset the Check Engine Light.

Cost to Fix P0455 1997 Ford F150

The typical repair costs for addressing a P0455 code on a 1997 Ford F150 can range from $100 to $500, depending on the specific cause of the issue and the cost of parts and labor. It's important to note that the actual repair costs may vary based on factors such as the location of the repair shop, the make and model of the vehicle, and the type of engine. Additionally, diagnostic time and labor rates can also affect the overall cost of the repair. It is recommended to consult with a qualified mechanic to get an accurate estimate for addressing this issue.

What does this mean?

Tech Notes for P0455 1997 Ford F150

The P0455 is a common code since it will set if the gas cap is loose or missing. Start by tightening the gas cap and clearing the code. In most cases, the code can be clear by disconnecting the car battery for about 30 minutes.



The PCM monitors the complete EVAP control system for no purge flow, the presence of a large fuel vapor leak, or multiple small fuel vapor leaks. The system failure occurs when no purge flow (attributed to fuel vapor blockages or restrictions), a large fuel vapor leak, or multiple fuel vapor leaks are detected by the EVAP running loss monitor test with the engine running (but not at idle).



There is a factory service bulletin for the 1997 Ford F-150:

1997 Ford F-150 Factory Service Bulletin OBDII Code P0455

Need more information about the P0455 1997 Ford F150 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 P0455 1997 Ford F150 Code

1. What does the OBDII code P0455 on a 1997 Ford F150 mean?

- The code P0455 indicates that the Evaporative Emission Control System has detected a gross leak.

2. What are common symptoms of a P0455 code on a 1997 Ford F150?

- Common symptoms may include a strong fuel odor, the Check Engine Light coming on, and potentially poor fuel economy.

3. What are some possible causes of a P0455 code on a 1997 Ford F150?

- Causes may include a loose gas cap, a damaged or cracked fuel filler neck, a faulty EVAP system purge valve, or a leak in the EVAP system hoses.

4. How serious is a P0455 code on a 1997 Ford F150?

- While the vehicle may still be drivable with a P0455 code, it is important to address the issue promptly to prevent potential fuel leaks or harm to the environment.

5. How can I diagnose a P0455 code on my 1997 Ford F150?

- Diagnosing a P0455 code typically involves checking the gas cap for tightness, inspecting the EVAP system components for damage, and using a smoke machine to detect leaks.

6. Can I still drive my 1997 Ford F150 with a P0455 code?

- While you may be able to drive the vehicle with a P0455 code, it is recommended to address the issue as soon as possible to prevent any potential safety or environmental hazards.

7. How do I repair a P0455 code on a 1997 Ford F150?

- Repairing a P0455 code may involve tightening or replacing the gas cap, repairing or replacing damaged components in the EVAP system, and clearing the code with a diagnostic tool.

8. Will a P0455 code on a 1997 Ford F150 affect fuel efficiency?

- Yes, a P0455 code can potentially lead to decreased fuel efficiency due to fuel vapors escaping from the EVAP system.

9. Are there any DIY tips for fixing a P0455 code on a 1997 Ford F150?

- DIY tips may include checking and tightening the gas cap, visually inspecting the EVAP system components for damage, and ensuring all connections are secure.

10. How much does it typically cost to repair a P0455 code on a 1997 Ford F150?

- The cost of repairing a P0455 code can vary depending on the specific issue, but it may range from a simple fix like tightening the gas cap to more involved repairs that could cost a few hundred dollars.

Discuss the causes and fixes for P0455 1997 Ford F150 OBDII Code

Submit a New Comment

  • What parts should I buy or look at to find the leak? I found a diagram for the system and believe its one of the hoses? I saw a youtube about a smoke test and a non-smoke test method to find leaks.. any other advice on this?

    Reply to Comment

  • Unless you can identify which hose is leaking, a smoke test is prudent.

    Reply to Comment