Causes and Fixes P1457 Engine Error Code Honda

By | May 24, 2023

Causes and Fixes P1457 Code Honda Civic Overview
If you have a Honda with a P1457 OBDII engine error code, there is a problem with the Evap system.

The Evap system is for emissions and a system that takes the gas vapors from the gas tank and feeds them into the engine to be burnt away.

What is a Honda P1457 Engine Error Code?

What is a Honda P1457 Engine Error Code
A P1457 OBDII code is an “Evap Control System Leakage (Evap Canister Area).”

Some OBDII scan tools will list it as an “Evaporative Emission Control System Leak Detected.”

The error code is given when the onboard computer detects a leak in the EVAP system.

This can be a few causes, including a bad charcoal canister, purge valve, vacuum leak, gas cap, and more.

4 Common Causes and Fixes for a P1457 Engine Code Honda

  1. Gas Cap
  2. Causes and Fixes P1457 Code Honda Civic Gas Cap
    A gas cap that is not sealing correctly can cause Evap problems.

    The Evap system was created to stop gas vapors from escaping and venting into the atmosphere, with the gas cap a part of this system.

    Inspect the area around the gas cap, making sure no dirt or debris is blocking it from closing completely.

    The gas cap will also have a seal that will hold the vapors inside the tank so they cannot escape.

  3. Charcoal Canister
  4. Causes and Fixes P1457 Code Honda Civic Charcoal Canister
    A P1457 code in a Honda is usually a problem with the charcoal canister.

    It is commonly located at the rear of the vehicle before the tires, but be sure to check the year of your Honda.
    Causes and Fixes P1457 Code Honda Civic Charcoal Canister 2
    The charcoal canister will have a solenoid called a vent valve, that often goes bad and can be replaced, or the entire unit can also be replaced.

  5. Purge Valve
  6. Causes and Fixes P1457 Code Honda Civic Purge Valve
    While the purge valve will usually give another code, it can, in some cases, cause a P1457 code.

    The purge valve is located up on top of the engine and will have two hoses going to it.
    Causes and Fixes P1457 Code Honda Civic Purge Valve
    The valve opens when the vehicle is running so the vapors from the gas tank can be burnt off and not vent into the atmosphere.

    When the vehicle is not running, the valve close and stops any vapors from escaping.

  7. EVAP Leak
  8. Hoses in the Evap system go from the gas tank through the charcoal canister to the purge valve and into the engine.

    If any of the hoses leak, they can cause an issue.

    Mechanics shops often use a smoke machine that feeds smoke into the Evap system and comes out the leak.

    If you do not have a smoke machine, closely examine the hoses for any possible leak.

How Do I Fix a Honda with an Engine Code P1457?

The evap system in the Honda will need to be checked and tested for a leak.

There are several components in an evap system, all of which should be tested and examined for a leak or malfunction.

The leak may also be in a hose or some other hard-to-spot location.

When a leak is hard to find, mechanics will often use a smoke machine that feeds smoke into the evap system and will come out at the leaky location.

Summary
A Honda with a P1457 OBDII code is having an issue with the Evap system.

The most common cause is the charcoal canister but it can also be other causes such as the purge valve and gas cap.

There may also be a leak in a line somewhere that is hard to find.

For hard-to-find leaks, mechanics will use a smoke machine that will feed smoke into the Evap system and come out at the leek.

Have you had an issue with a Honda with a P1457 OBDII code? Let us know your thoughts below.

Bob Thomas
Latest posts by Bob Thomas (see all)

Leave a Reply

Your email address will not be published. Required fields are marked *

This site uses Akismet to reduce spam. Learn how your comment data is processed.