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P0457 Acura Code - EVAP System Leak Detected/Fuel Fill Cap Loose Or Missing

Quick Answer

The P0457 code for Acura vehicles indicates that the Engine Control Module (ECM) has detected a leak in the EVAP (Evaporative Emission Control) system. Common causes include Loose or Missing Fuel Filler Cap: The most common cause of the P0457 code is a loose or missing fuel filler cap, Cracked EVAP Hose: A cracked or damaged EVAP hose can also lead to a leak in the system, Faulty EVAP Purge Valve: A malfunctioning EVAP purge valve can cause issues with the EVAP system. 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
P0457 Acura indicates EVAP System Leak Detected/Fuel Fill Cap Loose Or Missing.
Common causes
Common causes include Loose or Missing Fuel Filler Cap: The most common cause of the P0457 code is a loose or missing fuel filler cap, Cracked EVAP Hose: A cracked or damaged EVAP hose can also lead to a leak in the system, Faulty EVAP Purge Valve: A malfunctioning EVAP purge valve can cause issues with the EVAP system.
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 P0457 Acura Description

The P0457 code for Acura vehicles indicates that the Engine Control Module (ECM) has detected a leak in the EVAP (Evaporative Emission Control) system. Specifically, it suggests that there is a leak in the system related to the fuel filler cap being loose or missing. The EVAP system is designed to prevent fuel vapors from escaping into the atmosphere, reducing harmful emissions. When there is a leak in this system, it can lead to increased emissions and potential performance issues with the vehicle.

OBDII Code P0457 Acura - EVAP System Leak Detected/Fuel Fill Cap Loose Or Missing
P0457 Acura Code - EVAP System Leak Detected/Fuel Fill Cap Loose Or Missing

Common Causes of P0457 Acura

  1. Loose or Missing Fuel Filler Cap: The most common cause of the P0457 code is a loose or missing fuel filler cap.
  2. Cracked EVAP Hose: A cracked or damaged EVAP hose can also lead to a leak in the system.
  3. Faulty EVAP Purge Valve: A malfunctioning EVAP purge valve can cause issues with the EVAP system.
  4. EVAP System Leak: Any other leak in the EVAP system, such as a damaged canister or faulty sensor, can trigger this code.

Symptoms of P0457 Acura

  1. Check Engine Light: The most common symptom associated with the P0457 code is the illumination of the check engine light on the vehicle's dashboard.
  2. Fuel Smell: A noticeable fuel smell, especially around the fuel filler area, can indicate a leak in the EVAP system.
  3. Decreased Fuel Efficiency: As the engine compensates for the vacuum leak, fuel efficiency may decrease.
  4. Rough Idle: The engine may experience rough idling or hesitation due to the imbalance caused by the leak in the EVAP system.

How to Fix P0457 Acura

  1. Check Fuel Filler Cap: The first step is to check the fuel filler cap and ensure it is properly tightened. If it is loose or missing, replace it with a new one.
  2. Inspect EVAP System: Inspect the EVAP system for any visible signs of damage, such as cracked hoses or a damaged canister.
  3. Test EVAP Purge Valve: Test the EVAP purge valve to ensure it is functioning correctly. Replace it if necessary.
  4. Clear Codes: After making any necessary repairs, clear the diagnostic trouble codes from the ECM to reset the check engine light.
  5. Retest: After completing the repairs, retest the vehicle to ensure the issue has been resolved and the code does not return.

Cost to Fix P0457 Acura

The typical repair costs for addressing the P0457 code on an Acura vehicle can vary depending on the specific cause of the issue. In general, replacing a fuel filler cap can cost between $20 and $50, while repairing or replacing EVAP system components can range from $100 to $500 or more, depending on the extent of the damage. Labor costs can also vary, with rates typically ranging from $80 to $150 per hour. It's advisable to check with local auto repair shops for a more accurate estimate based on your specific vehicle make and model.

What does this mean?

Tech Notes for P0457 Acura

Check for a loose, missing or damage fuel filler the cap.

When is the Code Detected?

EVAP control system has a very large leak such as fuel filler cap fell off

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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.

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