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P0455 Infiniti Code - EVAP Control System Gross Leak Detected

Quick Answer

The P0455 code for Infiniti vehicles indicates that the Evaporative Emission Control System has detected a large leak. Common causes include Loose or damaged fuel cap, Cracked or disconnected EVAP hoses, 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 Infiniti indicates EVAP Control System Gross Leak Detected.
Common causes
Common causes include Loose or damaged fuel cap, Cracked or disconnected EVAP hoses, 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 06, 2024
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Code P0455 Infiniti Description

The P0455 code for Infiniti vehicles indicates that the Evaporative Emission Control System has detected a large leak. This system is responsible for capturing and recirculating fuel vapors that would otherwise be released into the atmosphere. A gross leak in this system can lead to increased emissions, reduced fuel efficiency, and potential harm to the environment. The leak may be caused by a damaged hose, loose fuel cap, or malfunctioning purge valve, among other issues. If left unresolved, the vehicle may fail emissions tests, experience decreased performance, and trigger additional warning lights on the dashboard.

OBDII Code P0455 Infiniti - EVAP Control System Gross Leak Detected
P0455 Infiniti Code - EVAP Control System Gross Leak Detected

Common Causes of P0455 Infiniti

  1. Loose or damaged fuel cap
  2. Cracked or disconnected EVAP hoses
  3. Faulty purge valve
  4. Malfunctioning EVAP canister
  5. Leaking fuel tank

Symptoms of P0455 Infiniti

  1. Check Engine Light is illuminated
  2. Strong gasoline smell around the vehicle
  3. Decreased fuel efficiency
  4. Hissing or whistling noises from the fuel tank area
  5. Difficulty starting the vehicle

How to Fix P0455 Infiniti

  1. Inspect the fuel cap and ensure it is tightened properly or replace it if damaged.
  2. Check EVAP hoses for cracks or disconnections and repair or replace as necessary.
  3. Test the purge valve for proper functionality and replace if faulty.
  4. Inspect the EVAP canister and fuel tank for leaks and repair or replace as needed.
  5. Clear the diagnostic trouble codes using a scan tool and test drive the vehicle to verify the repair.

Cost to Fix P0455 Infiniti

The cost to repair a P0455 code on an Infiniti vehicle can vary depending on the specific cause of the issue. On average, the repair may range from $100 to $500, including parts and labor. However, as mentioned earlier, labor rates can vary significantly, so it's recommended to obtain quotes from local auto repair shops for a more accurate estimate.

What does this mean?

Tech Notes for P0455 Infiniti

The P0455 it’s very common code because the code is 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 an Infiniti Service Bulletin to help diagnose the P0455 code:
Infiniti Factory Service Bulletin OBDII Code P0455

When is the Code Detected?

Malfunction is detected when EVAP control system has a leak, EVAP control system does not operate properly.

Need more information about the P0455 Infiniti code?

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Information for Specific Infiniti Models

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.

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