EVAP Emission Control System Leak Detected -- Canister Side (Honda)
What does P1457 mean?
The P1457 code means the vehicle's onboard diagnostic system has detected: EVAP Emission Control System Leak Detected -- Canister Side (Honda). This is a low severity code.
Common Symptoms
- Check Engine Light on
- Fuel smell from under the vehicle
- Failed emissions test
- No noticeable drivability issues
- Charcoal canister area may smell of fuel
Probable Causes (Ranked by Likelihood)
- Failed EVAP canister vent shut valve Very High
- Cracked or damaged charcoal canister High
- Leaking EVAP hose between canister and engine Moderate
- Loose connection at the charcoal canister Moderate
- Two-way valve failure in EVAP system Low
Step-by-Step Diagnostic Procedure
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Inspect the EVAP canister vent shut valve for proper operation
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Check all EVAP hoses from the canister to the engine for cracks or disconnections
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Perform a smoke test on the EVAP system focusing on the canister area
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Inspect the charcoal canister for cracks or damage
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Check the two-way valve in the EVAP system for proper sealing
Frequently Asked Questions
Can I drive with code P1457?
Yes. Like P1456, this is an EVAP leak code that does not affect drivability. The leak is on the canister side of the system rather than the fuel tank side.
What is the difference between P1456 and P1457?
P1456 is a leak detected on the fuel tank side (gas cap, filler neck, tank). P1457 is a leak on the canister side (charcoal canister, vent valve, hoses between canister and engine). P1457 is less likely to be fixed by a gas cap replacement.
Where is the charcoal canister on Honda?
On most Honda vehicles, the charcoal canister is located under the vehicle near the rear, close to the fuel tank. It may be mounted to the frame or subframe and is connected by hoses to both the fuel tank and the engine.