Honda Check Engine Light (CEL) may come on due to fault code P1457. This fault code is very common on Honda Accord, Civic, Odyssey, CR-V vehicles. Honda P1457 code is usually caused by the vent valve on the charcoal canister located under the car, near the fuel tank.
If the EVAP system fails the self-test at least twice it will turn on the check engine light (also known as CEL or MIL). Typically code P1457 on Honda vehicles does not impact engine performance. Even though the engine runs without any performance decrease, it is recommended to get code P1457 fixed as soon as possible.
Level of Expertise
To fix this problem replace the EVAP by-pass shut valve part 17310-S5A-L31. While not required, it is recommended to change the EVAP Canister at the same time.
The cause of the problem is typically corrosion or premature failure of the canister vent shut off valve. The EVAP canister and shut off valve are located by the gas tank. They can be accessed from under the vehicle. Removal of the gas tank is not necessary.
Remove second 13mm bolt.
Verify part numbers by calling Honda dealer or by contacting the supplier.
• You will not be able to pass state emission test if your Honda CEL is on due to P1457 fault code.
• If you clear P1457 fault without fixing the problem, your CEL / MIL light will return within two to three days.
• Avoid overfilling the fuel tank with fuel when you add fuel at the gas station.
• Perform a visual inspection of the vacuum hoses by the EVAP canister. Verify there is no evidence of cracks or tears in the lines and damage to the EVAP box itself.
• EVAP system can be challenging to diagnose. To properly diagnose Honda P1457 code, you should perform a smoke test which will check the EVAP system for leaks.
• Sometimes the screws will break off during the removal process and you may need to replace the complete canister and the valve.
• Replacing the gas cap does not typically fix Honda P1457 problem.
• Code P1457 on Honda vehicles can also be caused by bad ECU EVAP circuit or wires damaged.
• You will be working near the fuel tank. Do not use heat torch to heat up and remove the bolt.
A simple test you can perform is to activate the solenoid directly. If it does not respond at all then it probably means that solenoid is bad.
If you have replaced the charcoal canister vent valve and still have the P1457 on your Honda you need to perform a smoke test. If there no leaks detected during the smoke test, you should check the wiring and the ECU.
No. The check engine light will turn off on its own if the problem has been fixed. An EVAP system self-test will be performed in the next two driving cycles. If no problems are detected, the check engine light will turn off and the P1457 code will change from current to stored.
This issue can impact any model year but the most commonly it affects these years: 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006.