P1457 Honda Civic – Diagnosing & Fixing the Code

Adeel Amir

p1457 engine code

The P1457 code is one of the more enigmatic error messages on a Honda Civic. This post will help you understand the OBDII Honda Civic P1457 code, if you can drive with it, and how to solve it.

But first, let’s go through the fundamentals and knowledge that will help you identify the code error of the P1457 Honda Civic and ultimately you can rectify that error.

What Is the Honda Civic Code P1457?

On a Honda Civic OBDII, code P1457 indicates an Evaporative Emission Control System leak. Doesn’t that sound serious? Don’t worry just yet. It’s not as awful as it seems, and if you know what to search for, you can repair code P1457.

The P1457 code indicates a problem with your Honda Civic’s evaporative emission control system. It minimizes dangerous pollutants emitted into the environment.

When the code P1457 displays on the OBDII display, it simply implies that something is wrong with your vehicle’s evaporative emission control system (EVAP). The EVAP system captures and stores fuel vapors that would otherwise escape into the environment.

The Causes of Code Error P1457 Honda Civic

When the P1457 error code displays, it indicates that there is a leak in the EVAP system. Leaks like these might occur for a variety of causes. These might range from a faulty gasoline lid to a broken charcoal canister. It is critical to repair the code P1457 on a Honda Civic because a faulty EVAP system can reduce fuel economy and raise emissions.

A Defective or Damaged Gas Cap

The gas cap on your Civic is in charge of closing the gasoline tank and preventing fuel vapors from escaping. If the gasoline cap becomes loose, broken, or missing, your Honda ODBII check shows the P1457 code because the EVAP system detects a leak.

A Faulty Vent Valve

The charcoal canister houses the vent valve, which regulates the flow of gasoline vapors to your Civic’s engine. If the valve becomes stuck open or you become caught in the closed position, the Honda Civic’s EVAP system will detect a leak and display the P1457 code on the OBDII screen.

A Shattered Charcoal Canister

The charcoal canister in the Civic stores gasoline vapors and releases them to the engine when needed. If the fuel vapor canister becomes broken or clogged with dirt and debris, the EVAP system will detect a leak and the Honda Civic P1457 code will appear on the OBDII display.

Fuel Tank Pressure Sensor Failure

The final cause that comes to mind is if your gasoline tank pressure sensor fails. This widget measures the pressure in the gasoline tank. If the sensor fails to function properly, the EVAP system detects a leak and, you guessed it, the P1457 Honda Civic code appears.

These are just a few of the most prevalent reasons for the P1457 error code on your Honda Civic. Some less common problems, such as a malfunctioning purge valve or a broken gasoline filler neck, need repair. A malfunctioning EVAP canister vent shut valve or a broken or shattered fuel tank are examples of unusual faults.

The gasoline tank might rust or be damaged over time, causing leaks in the EVAP system. The gasoline tank pressure sensor may also be to blame in rare circumstances. This sensor is in charge of measuring gasoline tank pressure and can get damaged or malfunction over time.

Can You Drive If You Have A P1457 Code?

You can drive for a while with the P1457 code because it isn’t a significant problem, but don’t leave it for too long because it might affect your performance in the future.

In a hurry? Check out my new post on D Light Blinking Honda Issues

Code P1457 Signs & Symptoms

Before you see P1457 on a Honda Civic ODBII display, there may be some indications that some of the faults listed above have begun to occur.

Among the symptoms are:

  • A gasoline odor may emanate from your car.
  • Your vehicle’s idle may be harsh.
  • You may encounter frequent engine stalling.
  • You could notice a drop in fuel economy.

If you see any of these symptoms, have your Civic checked out right away. They can do diagnostics, which may show the P1457 error code.

How To Fix Code P1457 On A Honda Civic

Before you can resolve the P147 error number, you must first determine which of the following most frequent difficulties is from the list I provided earlier. Here’s how to go about it.

  • Inspect the gas cap to ensure it is securely fastened and in excellent shape. It might be causing the P1457 error code if it is loose or broken.
  • Inspect the EVAP system: If the gas cap is not the problem, look for leaks and apparent evidence of damage in the EVAP system.
  • Use a diagnostic instrument: If you can’t detect any apparent indicators of damage or leaks, a diagnostic tool can assist you in pinpointing the problem, such as the location of the leak in the EVAP system.

And now here are some possible solutions:

Step 1: Examine The Gas Cap

The first step is to inspect the gas cap. It’s conceivable that the cap isn’t properly fastened or that it’s damaged. The P1457 code might show if the gas cap is loose or broken. Simply tightening or replacing the gas cap should resolve the problem.

Step 2: Check For Leaks In The EVAP System

If the gas cap is not the problem, the EVAP system should be checked for leakage. The EVAP system is in charge of collecting and storing fuel vapors from the fuel tank. The P1457 error code might emerge if there is a leak in the system.

A smoke test is one method for detecting leaks. This entails injecting smoke into the EVAP system and inspecting it for leaks. This test should be performed by a skilled technician.

Step 3: Replace Faulty Components

If the EVAP system has leaks, the next step is to identify the damaged pieces and repair them. The vent valve on the charcoal canister, the fuel tank pressure sensor, and the purge valve are all common items that might cause the P1457 code to show.

Final Thoughts

In conclusion, I would say that the Evap system is malfunctioning in a Honda with a P1457 OBDII code. The most typical reason is the charcoal canister, although other factors such as the purge valve and gas cap can also contribute to an error in the P1457 Honda Civic

There might possibly be a leak in a line somewhere that is difficult to locate. For difficult-to-find leaks, mechanics will employ a smoke machine, which will feed smoke into the Evap system and exit at the leak.


What is the cause of the code P1457?

A broken or worn-out cap is the most typical cause of the P1457 code. The caps are inexpensive and simple to change. If replacing the gas cap does not remove the code, verify the canister side vacuum lines on the EVAP. Check for leaks at the connectors and hose ends.

What is the EVAP system on a Honda Civic?

The EVAP system utilizes the charcoal canister to store gasoline vapors exiting the gas tank through a tube. The engine vacuum empties the charcoal (EVAP) canister by drawing out the vapors, which are subsequently burned as fuel. This is only possible if the vent and purge valves are both opened at the same time.

What is the code P1457 on a Citroen Jumpy?

The p1457 code stands for ‘pressure differential sensor,’ and it is placed directly above the alternator, with two short pipes protruding from it and a push-in electrical connector.

Is it OK to drive with an EVAP leak?

Begin by changing the gas cap, which may have a worn-out O-ring from normal use. If it doesn’t resolve your EVAP leak concerns, you’ll need to find the leak using an engine vacuum gauge, a manual vacuum pump, or professional smoke test equipment.

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