One of the more mysterious error messages on a Honda Civic is the P1457 code. This help guide will demystify it for you, explain what the OBDII Honda Civic P1457 code is, whether you can drive with it, and how you can fix it.
Let’s start with the basics first though.
What is the code P1457 on a Honda Civic?
Code P1457 on a Honda Civic OBDII means an Evaporative Emission Control System leak has been detected. Sounds serious doesn’t it, but don’t worry just yet. It’s not as bad as it sounds, and you can fix code P1457 once you know what to look for.
The P1457 code indicates there is problem with the evaporative emission control system in your Honda Civic. This system is responsible for reducing harmful pollutants released into the environment.
When the code P1457 appears on the OBDII display it simply means something is wrong with the evaporative emission control system (EVAP) on your vehicle. The EVAP system is responsible for capturing and storing fuel vapors that would otherwise escape into the atmosphere.
Reasons for the Honda Civic P1457 code
When the P1457 code appears, it means there is a leak in the EVAP system. Leaks like this can be caused for several reasons. These can include a loose fuel cap to a damaged charcoal canister. It’s important to fix the code P1457 on a Honda Civic as a a malfunctioning EVAP system could mean you get a decrease in fuel efficiency and increase your vehicle’s emissions.
1. A faulty or damaged gas cap
The gas cap is responsible for sealing the fuel tank in your Civic and is designed to stop fuel vapors from escaping. If the fuel cap has become loose, damaged, or missing, the EVAP system will detect a leak and trigger the P1457 code on your Honda ODBII check.
You might also have a warning on the in-car display too, reading “Check Fuel Cap“.
2. A malfunctioning vent valve
The vent valve is located on the charcoal canister and is responsible for controlling the flow of fuel vapors to your Civic’s engine. If the valve has become stuck open or you stuck in the closed position, then it’s another reason for the Honda Civic’s EVAP system to detect a leak and display the P1457 code on the OBDII screen.
3. A damaged charcoal canister
The Civic’s charcoal canister store fuel vapors and then releases them to the engine when needed. If the fuel vapor canister gets damaged or clogged up with dirt and debris, then again, the EVAP system will detect a leak and you will see a Honda Civic P1457 code on the OBDII display.
4. A faulty fuel tank pressure sensor
The last possible reason I can think of would be when your fuel tank pressure sensor malfunctions. This widget is monitors the pressure inside the fuel tank. If the sensor is not working properly, it can cause the EVAP system to detect a leak and, you guessed it, the Honda Civic P1457 error code displays.
These are just some of the most common causes of the P1457 error code on your Honda Civic that I can think of. There are some less common issues that require a fix, for example a faulty purge valve or a damaged fuel filler neck. Other rare errors can be a faulty EVAP canister vent shut valve or damaged or cracked fuel tank.
Over time, the fuel tank can become corroded or damaged, leading to leaks in the EVAP system. In some cases, the fuel tank pressure sensor may also be to blame. This sensor is responsible for monitoring the pressure within the fuel tank and can become damaged or malfunction over time.
Can you drive with a P1457 code?
You can drive for a while with P1457 code as it’s not a serious issue but don’t leave it for long, as if left, it could impact your performance in the future.
Symptoms of Code P1457
Before you see P1457 on a Honda Civic ODBII display, there could be some signs that some of the errors you can fix above, have started to happen. Symptoms include:
- You may notice a fuel odor coming from your vehicle.
- Your vehicle may have a rough idle.
- You may experience frequent engine stalls.
- You may notice a decrease in fuel efficiency.
If you experience any of these symptoms, get the Civic checked ASAP. They can run diagnostics, which might reveal the P1457 code.
How do I fix code P1457 on a Honda Civic
Before you can fix the P147 code, you will need to diagnose which of the most common possible issues it is from the list I described earlier. Here’s how to do that.
- Check the gas cap: Make sure it is tightly secured and in good condition. If it is loose or damaged, it could be causing the P1457 error code.
- Inspect the EVAP system: If the gas cap is not the issue, inspect the EVAP system for leaks and any visible signs of damage.
- Use a diagnostic tool: If you are unable to find any visible signs of damage or leaks, you can use a diagnostic tool to help you identify the issue such as the location of the leak in the EVAP system.
And now here are some possible ways of fixing it:
Step 1: Check the Gas Cap
The first thing you should do is check the gas cap. It’s possible that the cap is not tightened properly or it’s damaged. If the gas cap is loose or damaged, it can cause the P1457 code to appear. Simply tightening the gas cap or replacing it should fix the issue.
Step 2: Check the EVAP System for Leaks
If the gas cap is not the issue, the next step is to check the EVAP system for leaks. The EVAP system is responsible for capturing and storing fuel vapors from the fuel tank. If there is a leak in the system, it can cause the P1457 code to appear.
One way to check for leaks is to perform a smoke test. This involves introducing smoke into the EVAP system and looking for any leaks. A professional mechanic should be able to perform this test for you.
Step 3: Replace Faulty Parts
If there are leaks in the EVAP system, the next step is to identify the faulty parts and replace them. Common parts that can cause the P1457 code to appear include the vent valve on the charcoal canister, the fuel tank pressure sensor, and the purge valve.