P1457Auxiliary Emission Controls

EVAP Canister System Leak (Honda/Acura)

P1457 is a Honda/Acura code for a leak detected in the EVAP canister side of the evaporative emission system, often involving the canister vent valve or related hoses.

🚗 Yes. This is an EVAP leak code and rarely affects drivability.

LOW

severity

🎯 Top Causes, Ranked by Likelihood

#1Faulty EVAP canister vent valve$60-$250

45%

A stuck or leaking vent valve fails the leak test.

#2Cracked or disconnected EVAP hose$20-$150

30%

A leaking hose lets the system fail the pressure test.

#3Faulty canister or two-way valve$100-$400

25%

A cracked canister or bad valve creates a leak.

🩺 Common Symptoms

Check engine light
Possible fuel odor
No noticeable drivability change
Failed emissions test

💰 Repair Cost: DIY vs Shop

DIY Cost

$20-$250

Shop Cost

$120-$400

📋 Free OBD2 Code Cheat Sheet

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🔧 How to Diagnose P1457

1Inspect EVAP hoses on the canister side for cracks

2Test the canister vent valve

3Smoke-test the EVAP system for leaks

4Replace the leaking component

❓ Frequently Asked Questions

Can I drive with P1457?

Yes. It is an EVAP leak code and rarely affects how the car drives, but it will fail emissions.

Is P1457 a Honda code?

Yes, P1457 is a Honda/Acura EVAP canister system leak code.

What causes P1457?

A faulty vent valve, cracked hoses, or a bad canister are common causes.

🔗 Related Codes

P1456P0455P0442