Honda P1457 Fault Code: Causes, Symptoms, and How to Fix It
A fault code P1457 may come on and illuminate the Check Engine Light (CEL) of your Honda. This DTC is common on Honda models such as Accord, Civic, Odyssey, and CR-V vehicles. Honda P1457 fault code is usually caused by the charcoal canister vent valve unable to close when commanded. This component is located under the car near the fuel tank.
Causes of P1457 Code on Honda Vehicles
The Evaporative Emission System (EVAP) will perform a self-test after you park the vehicle and cool it down. The system will re-run if any of the components do not pass the self-test. If it fails twice, the check engine light (CEL or MIL) will turn on.
Typically, code P1457 on Honda vehicles does not impact engine performance. Even though the engine runs without any performance decrease, it is recommended that code P1457 be fixed as soon as possible.
- The most common problem triggering the P1457 fault is the Honda EVAP canister vent shut valve. The valve usually gets stuck due to corrosion or leaks.
- Defective 2-Way Bypass Valve.
- Damaged or crimped vacuum line to the charcoal canister
Symptoms
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How to fix it
To fix this problem, replace the EVAP by-pass shut valve, part 17310-S5A-L31. While not required, it is recommended that you change the EVAP Canister simultaneously.
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.
Instructions
- Lift up both rear wheels by using a jack of your Honda Accord, Civic, and CR-V.
- Place jack stands to support the vehicle.
- Slide under the vehicle and locate the charcoal canister shut-off valve. A metal shield may cover the unit on some models, such as Honda CR-V.
- Remove the 13mm bolt for the metal shield. We strongly recommend spraying Penetrating Liquid on the bolts the night before the repair. This will make it easier the next day to remove the bolts. Remove the second 13mm bolt.
- Unplug the connector from the shut-off valve.
- Remove clamps from hoses. Carefully remove the hoses from the shutoff valve and charcoal canister.
- Remove the bolt holding the shut-off valve on the canister. These bolts are usually rusted. Use vice grip pliers to remove them.
- Reinstall all in reverse.
Related Part Numbers
- Canister assembly: 17011-S5A-A30
- Canister vent shut valve: 17310-S5A-L31
Verify part numbers by calling the Honda dealer or by contacting the supplier.
Special Tips
Things you need to know
• EVAP systems can be challenging to diagnose. To properly diagnose the Honda P1457 code, you should perform a smoke test to check the EVAP system for leaks.
• Sometimes, the screws will break off during removal, and you may need to replace the complete canister and the valve.
• Replacing the gas cap does not typically fix the Honda P1457 problem.
• Bad ECU EVAP circuits or wires can also cause code P1457 on Honda vehicles.
Safety warnings
• You will be working near the fuel tank. It is prohibited to use a heat torch to heat up and remove the bolts.
Frequently Asked Questions
Should I replace the gas cap?
How do you check the vent valve?
I replaced the vent valve, but P1457 keeps coming back.
Do I need to erase the codes after I replace the canister shut-off valve?
Which years have been impacted by this problem?
We hope you find the Honda P1457 Fault Code Problem, Cause, Solution guide helpful. Check these troubleshooting and repair guides for more help on your Honda.
