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Engine-Codes – Nissan – P0455 2011 Nissan Altima Sedan

P0455 2011 Nissan Altima Sedan Code - EVAP Control System Gross Leak Detected

Quick Answer

The P0455 code for a 2011 Nissan Altima Sedan indicates that the EVAP (Evaporative Emission Control) system has detected a gross leak. Common causes include Loose or damaged gas cap, Cracked or disconnected EVAP system 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 2011 Nissan Altima Sedan indicates EVAP Control System Gross Leak Detected.
Common causes
Common causes include Loose or damaged gas cap, Cracked or disconnected EVAP system 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 08, 2024
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Code P0455 2011 Nissan Altima Sedan Description

The P0455 code for a 2011 Nissan Altima Sedan indicates that the EVAP (Evaporative Emission Control) system has detected a gross leak. The EVAP system is responsible for capturing and storing fuel vapors to prevent them from escaping into the atmosphere. A gross leak means that a large amount of fuel vapor is escaping from the system, which can lead to increased emissions and potential safety hazards.

OBDII Code P0455 2011 Nissan Altima Sedan - EVAP Control System Gross Leak Detected
P0455 2011 Nissan Altima Sedan Code - EVAP Control System Gross Leak Detected

Common Causes of P0455 2011 Nissan Altima Sedan

  1. Loose or damaged gas cap
  2. Cracked or disconnected EVAP system hoses
  3. Faulty purge valve
  4. Defective charcoal canister
  5. Damaged EVAP system components

Symptoms of P0455 2011 Nissan Altima Sedan

  1. Check engine light illuminated on the dashboard
  2. Decreased fuel efficiency
  3. Rough idling or stalling
  4. Strong fuel odor near the vehicle
  5. Failed emissions test

How to Fix P0455 2011 Nissan Altima Sedan

  1. Begin by checking the gas cap to ensure it is tightened properly. If the cap is damaged, replace it with a new one.
  2. Inspect all EVAP system hoses for cracks or disconnections. Replace any damaged hoses.
  3. Test the purge valve to determine if it is functioning correctly. Replace if necessary.
  4. Check the charcoal canister for any signs of damage or leaks. Replace if needed.
  5. Clear the diagnostic trouble codes from the vehicle's computer using an OBD-II scanner to reset the check engine light.

Cost to Fix P0455 2011 Nissan Altima Sedan

The typical repair costs for addressing a P0455 code on a 2011 Nissan Altima Sedan can range from $100 to $500, depending on the specific cause of the issue and the cost of replacement parts. This estimate includes parts and labor. However, it's important to note that actual repair costs may vary based on factors such as location, vehicle make and model, and the mechanic's labor rates. It's advisable to consult with a trusted auto repair shop to get a more accurate estimate for your specific situation.

What does this mean?

Tech Notes for P0455 2011 Nissan Altima Sedan

The P0455 it’s a 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 a factory Nissan service bulletin to help diagnose the P0455 code:
Nissan Factory Service Bulletin OBDII Code P0455





User Submitted Video

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 2011 Nissan Altima Sedan 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 2011 Nissan Altima Sedan Code

1. What does OBDII code P0455 mean for a 2011 Nissan Altima Sedan?

- OBDII code P0455 in a 2011 Nissan Altima Sedan indicates a "EVAP Control System Gross Leak Detected" error.

2. What are the common symptoms of OBDII code P0455 in a 2011 Nissan Altima Sedan?

- Common symptoms of code P0455 include the check engine light turning on, a noticeable fuel odor, and potential difficulty starting the vehicle.

3. What are the possible causes of OBDII code P0455 in a 2011 Nissan Altima Sedan?

- The most common causes of code P0455 in a 2011 Nissan Altima Sedan are a loose or damaged gas cap, a leak in the fuel tank filler neck, a faulty EVAP system purge valve, or a cracked EVAP system hose.

4. How serious is OBDII code P0455 in a 2011 Nissan Altima Sedan?

- While code P0455 is not an immediate threat to the vehicle's drivability, it should be addressed promptly to prevent potential fuel system issues and to ensure the vehicle passes emissions tests.

5. How can I diagnose OBDII code P0455 in my 2011 Nissan Altima Sedan?

- Diagnosing code P0455 may involve checking the gas cap for tightness, inspecting visible hoses and components in the EVAP system, and using a smoke machine to detect leaks.

6. Can I continue driving my 2011 Nissan Altima Sedan with OBDII code P0455?

- It is generally safe to drive your vehicle with code P0455, but it is recommended to address the issue as soon as possible to prevent potential fuel system problems and ensure proper emissions control.

7. How do I repair OBDII code P0455 in my 2011 Nissan Altima Sedan?

- Repairing code P0455 may involve tightening or replacing the gas cap, repairing or replacing damaged hoses or components in the EVAP system, and clearing the code with an OBDII scanner.

8. Will OBDII code P0455 cause a decrease in fuel efficiency in my 2011 Nissan Altima Sedan?

- While code P0455 itself may not directly cause a decrease in fuel efficiency, addressing the underlying issue promptly can help maintain optimal fuel system performance and efficiency.

9. Can a DIY enthusiast fix OBDII code P0455 in a 2011 Nissan Altima Sedan?

- Depending on the cause of code P0455, some DIY enthusiasts may be able to address the issue by checking and tightening the gas cap, inspecting visible hoses, or replacing certain components in the EVAP system.

10. How much does it typically cost to repair OBDII code P0455 in a 2011 Nissan Altima Sedan at a mechanic?

- The cost of repairing code P0455 in a 2011 Nissan Altima Sedan can vary depending on the specific cause, but it may range from $100 to $500, including parts and labor.

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