AutoCodes – Lincoln – P0455 Lincoln

P0455 Lincoln Code - Evaporative Emission Control System Leak Detected Gross Leak

Quick Answer

Vehicles that meet enhanced evaporative requirements utilize a vacuum-based evaporative system integrity check. Common causes include Missing or loose 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: P0455 Lincoln indicates Evaporative Emission Control System Leak Detected Gross Leak.
Common causes: Common causes include Missing or loose 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 8,456

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 Mar 25, 2024

Description
Step-by-Step Diagnostic Guide
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P0455 Lincoln Description

Vehicles that meet enhanced evaporative requirements utilize a vacuum-based evaporative system integrity check. The EVAP system integrity check uses a Fuel Tank Pressure Transducer (FTPT), a Canister Vent Solenoid (CVS) and Fuel Level Input (FLI) along with the Vapor Management Valve (VMV) or Electric Vapor Management Valve (EVMV) to find 0.040" diameter or larger EVAP system leaks. Federal vehicles can utilize a 0.040" leak check rather than the 0.020" leak check required for California vehicles.
The Diagnostic Trouble Code (DTC) will set when the EVAP control system has a very large leak such as the fuel filler cap fell off, the EVAP control system does not operate properly.

OBDII Code P0455 Lincoln - Evaporative Emission Control System Leak Detected Gross Leak - AutoCodes.com — P0455 Lincoln Code - Evaporative Emission Control System Leak Detected Gross Leak

What does this mean?

What are the Possible Causes of the DTC P0455 Lincoln?

Missing or loose fuel cap
Incorrect fuel filler cap used
Fuel filler cap remains open or fails to close
Foreign matter caught in fuel filler cap
EVAP canister or fuel tank leaks
EVAP system hose leaking
Fuel tank leaking

How to Fix the DTC P0455 Lincoln?

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

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.

There is a factory service bulletin for the following Lincoln vehicles:
1997-1998 Lincoln Mark VIII
1997-2002 Lincoln Continental
1997-2003 Lincoln Town Car
2000-2003 Lincoln LS
1998-2003 Lincoln Navigator
2002-2003 Lincoln Blackwood
Lincoln Factory Service Bulletin OBDII Code P0455

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0455 Lincoln 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 P0455 Lincoln Code

1. What does OBDII code P0455 for Lincoln mean?

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

2. What are the common symptoms of a P0455 code in a Lincoln vehicle?

Common symptoms include the check engine light being illuminated, the smell of fuel vapors, and potential difficulty starting the vehicle.

3. What are the possible causes of a P0455 code in a Lincoln?

Potential causes include a loose or damaged gas cap, a cracked or loose EVAP hose, a faulty EVAP canister, or issues with the EVAP purge valve.

4. How serious is a P0455 code in a Lincoln?

While the vehicle may still be drivable with a P0455 code, it is important to address the issue promptly to prevent potential fuel leaks and emissions problems.

5. How do I diagnose a P0455 code in my Lincoln?

Diagnosing a P0455 code typically involves inspecting the EVAP system components, checking for visible damage or leaks, and using a scan tool to pinpoint the exact source of the issue.

6. Can I repair a P0455 code in my Lincoln myself?

Depending on the cause of the code, some repairs may be DIY-friendly, such as tightening or replacing a gas cap. However, more complex issues may require professional diagnosis and repair.

7. What are some tips for repairing a P0455 code in a Lincoln?

Ensure the gas cap is securely tightened, visually inspect EVAP system components for damage, check for loose or disconnected hoses, and consider performing a smoke test to detect leaks.

8. How much does it typically cost to repair a P0455 code in a Lincoln?

The cost of repairing a P0455 code can vary widely depending on the cause of the issue and whether professional diagnosis and repair are needed. Simple fixes like replacing a gas cap may be relatively inexpensive.

9. What happens if I ignore a P0455 code in my Lincoln?

Ignoring a P0455 code can lead to increased emissions, decreased fuel efficiency, and potential safety hazards due to fuel leaks. It is recommended to address the issue promptly.

10. How can I prevent a P0455 code from appearing in my Lincoln in the future?

To prevent a P0455 code, regularly check and maintain your vehicle's EVAP system, ensure the gas cap is properly tightened after refueling, and address any fuel system issues promptly.