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P0455 Acura Code - EVAP System Large Leak Detected

Quick Answer

The P0455 code for Acura vehicles indicates that there is a large leak detected in the EVAP (Evaporative Emission Control) system. Common causes include Loose or damaged gas 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 Acura indicates EVAP System Large Leak Detected.
Common causes
Common causes include Loose or damaged gas 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 09, 2024
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Code P0455 Acura Description

The P0455 code for Acura vehicles indicates that there is a large leak detected in the EVAP (Evaporative Emission Control) system. The EVAP system is responsible for preventing fuel vapors from escaping into the atmosphere, capturing and storing them in a charcoal canister until they can be purged and burned in the engine. When a large leak is detected, it means that there is a significant issue with the system's ability to contain and control these emissions.

OBDII Code P0455 Acura - EVAP System Large Leak Detected
P0455 Acura Code - EVAP System Large Leak Detected

Common Causes of P0455 Acura

  1. Loose or damaged gas cap
  2. Cracked or disconnected EVAP hoses
  3. Faulty purge valve
  4. Leaky charcoal canister
  5. Malfunctioning EVAP system pressure sensor

Symptoms of P0455 Acura

  1. Check Engine Light illuminated
  2. Strong fuel odor
  3. Decreased fuel efficiency
  4. Rough engine idle
  5. Difficulty starting the vehicle

How to Fix P0455 Acura

  1. Inspect and tighten or replace the gas cap
  2. Check and repair any damaged or disconnected EVAP hoses
  3. Test and replace the purge valve if necessary
  4. Inspect and replace the charcoal canister if it is leaking
  5. Test and replace the EVAP system pressure sensor if it is malfunctioning

Cost to Fix P0455 Acura

The typical repair costs for addressing a P0455 code on an Acura vehicle 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 costs may vary based on the location, vehicle make and model, and the rates of the auto repair shop. Diagnosis time and labor rates can also impact the overall cost of the repair. It's recommended to obtain quotes from multiple sources to get a more accurate estimate for the repair.

What does this mean?

Tech Notes for P0455 Acura

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

When is the Code Detected?

Evaporative Emission System (EVAP) control system has a very large leak such as fuel filler cap fell off, EVAP control system does not operate properly.

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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 Acura Code

1. What does the OBDII code P0455 mean on an Acura?

P0455 indicates a large leak in the EVAP (Evaporative Emission Control) system, which is responsible for trapping fuel vapors and preventing them from escaping into the atmosphere.

2. What are the common symptoms of the P0455 code in an Acura?

Symptoms may include the check engine light turning on, a noticeable fuel smell, and potentially a slight decrease in fuel efficiency.

3. What causes the P0455 code on an Acura?

Common causes include a loose or damaged gas cap, a cracked or disconnected EVAP hose, a faulty purge valve, or a malfunctioning EVAP canister.

4. Can a loose gas cap trigger the P0455 code in an Acura?

Yes, a loose, damaged, or missing gas cap is one of the most common reasons for the P0455 code.

5. How can I fix the P0455 code on my Acura?

Start by tightening or replacing the gas cap. If the code persists, inspect the EVAP system for leaks, damaged hoses, or faulty components like the purge valve or canister.

6. Is it safe to drive an Acura with the P0455 code?

Yes, it's generally safe to drive, but ignoring the issue can lead to increased emissions and potentially affect other components over time.

7. How do mechanics diagnose the P0455 code on an Acura?

Mechanics use a smoke test to detect leaks in the EVAP system, inspect hoses and connections, and check the gas cap and related components.

8. Can extreme weather cause the P0455 code in an Acura?

Yes, extreme heat or cold can sometimes cause plastic or rubber components in the EVAP system to crack or fail, leading to leaks.

9. Will clearing the P0455 code solve the issue on my Acura?

Clearing the code may turn off the check engine light temporarily, but the issue will return if the underlying problem isn’t fixed.

10. How much does it cost to repair the P0455 code on an Acura?

Costs vary depending on the cause. Replacing a gas cap is inexpensive, around $20, while repairing leaks or replacing EVAP components can range from $100 to $500 or more.

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