Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
Your car has a system that keeps gas fumes from escaping into the air. This code means that the system isn't working right, and it can't hold the gas fumes in like it's supposed to.
The P1457 code indicates a problem with the evaporative emission control (EVAP) system, specifically that it cannot create a vacuum in the fuel tank.
The P1457 code is triggered when the Engine Control Module (ECM) detects that the EVAP system cannot maintain a vacuum in the fuel tank. This is often due to a leak or a malfunctioning component within the EVAP system, such as the canister purge valve or the vent valve.
• Check Engine Light is on
• Slight decrease in fuel efficiency
• Gasoline smell from the vehicle
• Leaking or damaged EVAP hoses
• Faulty canister vent valve
• Malfunctioning purge valve
EVAP: Evaporative Emission Control System
ECM: Engine Control Module
• Inspect EVAP hoses for leaks or damage
• Test the canister vent valve for proper operation
• Check the purge valve for functionality
• Replace damaged EVAP hoses
• Replace the faulty canister vent valve
• Repair or replace the purge valve
• OBD-II scanner
• Vacuum pump
• Multimeter
$100 - $300
Moderate
• Honda Accord
• Honda Civic
• Acura TL
• Regularly inspect EVAP system components
• Ensure gas cap is properly sealed
• Perform routine maintenance checks
Emission Control Issue
• Avoid overfilling the gas tank
• Ensure the gas cap is tightly closed after refueling
Check with the manufacturer for emissions-related warranties, as some components may be covered under extended emissions warranties.
The P1457 code has been commonly reported in Honda and Acura models, often linked to issues with the EVAP system's vent valve.
Moderate – While not immediately dangerous, it should be addressed to prevent increased emissions and potential fuel efficiency loss.
Driving with an emissions-related fault may result in failing emissions tests and could lead to environmental harm.
• Vehicle at operating temperature
• Fuel tank between 1/4 and 3/4 full
The EVAP canister and associated valves are typically located near the fuel tank or along the fuel lines.
Q: Can I drive my car with a P1457 code?
A: Yes, but it's best to fix it soon to avoid increased emissions and potential fuel efficiency issues.
Q: Will a loose gas cap cause a P1457 code?
A: A loose gas cap is more likely to cause a P0455 or P0442 code, but it's still a good idea to check it.
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Universal · Digital multimeter
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Useful when diagnosis points toward damaged wiring, corroded terminals, or connector repairs.
Useful if diagnosis points toward damaged connectors, wiring, or terminal repairs.
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Fitment Required · Vehicle-fitment part
Relevant when EVAP diagnosis points toward purge-flow or purge-control faults.
EVAP diagnosis often includes purge-flow and valve-control faults.
Confirm the failed valve and exact fitment before buying parts.
View options on AmazonThese parts may be related to this fault category, but a code by itself does not confirm exact fitment or guarantee that replacing a part will solve the problem.