Honda CR-V P0457: EVAP System – Leak Detected
P0457 This is an example of a common problem code for the Honda CR-V. Refers to a code that you get when your CRV is plugged into an a OBDII scanner. The P0457 signifies that the Evaporative Emissions Control (EVAPS) system is leaking. Similar to P0455 for large leaks and P0456 for small leaks, it is also called P0457.
P0457 does not pose a danger to your CR-V's driveability. Certainly anytime the service engine soon light is on though, it’s good to deal with it as soon as possible.
Honda CR-V P0457 Definition
The universal OBDII code P0457 can be used to diagnose trouble codes. It means that no matter what make or model vehicle you have, this code will always mean the same thing (CRV or not). Technically speaking, it stands for the following:
System Leak – Evaporative Emission System
The EVAP system collects fuel vapor from your fuel tank. It then sends it to the intake to ignite the engine in normal combustion. When there is a leak in the Honda CR-V’s EVAP system, it will throw the P0457 OBDII Code.
Honda CR-V P0457 OBDII Code Symptoms
The P0457 code is usually not accompanied with any other symptoms than those listed. Smells like gas And the service engine soon light.
Particular attention should be paid to the smell of fuel near the fuel tank or fuel filler tube.
The EVAP process deals with fuel vapors directly. If these vapors are leaking from the system, you’ll often smell them faintly while operating the vehicle. But, it won’t affect the way the engine itself runs. The EVAP technology deals only with fuel vapor. It does not impact the performance of your CR-V engine.
CR-V Trouble Code Causes
P0457 can occur for many reasons in Honda CR-V. If your CR-V has warned you at all in the last few months that the fuel cap was off when it wasn’t, then replacing it would be a great first step.
These are some of the most frequent problems that can throw off the code. They're listed in alphabetical order, from the most likely to the least.
- Evap System Hose– The hose that carries the fuel vapor from the fuel tank to the intake manifold can begin to leak. This can lead to the code P0457. It should have a tear or a hole. This is one of most frequent causes for the code.
- Vapor Canister Purge Valve– One of the most common causes of the P0457 code is the vapor canister purge valve. It’s really easy to replace. You will need to locate and take out a few clips.
- Fuel Tank Sending Unit– It is possible for the gasket that attaches the fuel sending unit to the gas tank to go bad. This could cause a drop in tank pressure which can throw off the code.
- Fuel Cap– A bad fuel cap can cause the code to be thrown for sure. Often, you’ll get a message informing you that the fuel cap is off even when it is on. It may be worth your time to get that message and a P0457 to ensure you don't waste any money.
- Fuel Filler Neck– There is often a gasket where the fuel filler neck connects with the gas tank. The gasket may dry out especially if the vehicle is in dry conditions. When it dries out, the fuel tank can’t hold pressure anymore.
P0457 Diagnosis- Honda CR-V
The mechanic will have a lot of different tools at his disposal in order to determine the cause of your Honda CR-V P0457. The most commonly used methods to diagnose this code are:
- A mechanic will usually check for any additional trouble codes. A mechanic will usually check for additional trouble codes to help diagnose the problem. That’s because when they appear together in certain combinations, there will often only be only a few conditions that will throw any combination of codes at one time.
- The mechanic will normally determine what trouble codes are associated with P0457. Take a look at the EVAP system. These include the line and purge valve.
- A mechanic will examine the gas cap and verify that it is able to withstand high pressure. If you are getting a warning that your gas cap is off, even when it’s on, replacing it will more than likely clear this code.
- Monitoring and checking the fuel tank pressure is a must.
- Following the inspections and repairs, the mechanic will conduct two more tests.
- A smoke test, and they’ll use a scan tool to confirm that the EVAP solenoids and valves are operating properly.
Here’s a pretty good video on diagnosing these leaks from Scotty Kilmer, if you are interested:
The most common P0457 fixes
These are some of the more common CRV P0457 fix:
- Replacing the gas cap
- Replacing EVAP lines
- Replace charcoal canister
- Replacing the fuel tank
It is best to begin with the gas cap, and then work your way up to the fuel tanks. The gas cap is the most difficult and cost-effective item to replace.
Here’s a great video on How to check your gas cap.
It's a good idea to try and figure out why your Honda CR-V is throwing the P0457 code. We trust this helped. You can add any additional information by leaving a comment.
Do you consider P0457 to be a serious concern?
While P0457 is not going to cause the CR-V’s engine to stop running, it should not be treated lightly. There could be fuel contamination. You should pay extra attention to the level of your fuel tank and ensure that you're not leaking fuel. You should immediately take it in for repair or replacement.
Please leave comments below if you have any suggestions. Thanks!