P1457Manufacturer-specific code

P1457 Code: EVAP System Leak: Canister Side (Honda)

On Honda and Acura vehicles, the P1457 code means the EVAP system has a leak on the canister side. It usually causes no noticeable symptoms. The canister vent valve is the most common cause on Honda.

Severity
Low
Can I keep driving?
Yes, no immediate risk
Estimated cost
$40 to $500
Difficulty
Medium
System
Emissions Control
Applies to
Depends on the manufacturer

Common in: Honda

Updated Reviewed by Renzo Chacca

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What the P1457 code means

P1457 is a manufacturer-specific code: the 1 in the second position means each automaker defines what it means, not the generic SAE standard. The most widespread definition is the one used by Honda and Acura. If your vehicle is another brand, confirm the code text with a scan tool that supports that manufacturer.

ManufacturerMeaning of P1457
Honda and AcuraEVAP system leak: canister side

Honda tests the EVAP system by closing the vent valve and measuring tank pressure with a cold engine or after shutdown. It splits the test into two parts: the tank side and the canister side.

The computer sets the P1457 code when it detects a leak between the control valve and the canister, including the vent valve.

Before you start repairs, confirm the make, model, year and engine. With manufacturer codes, the same number can change even between engines from the same brand.

P1457 code symptoms

  • Check engine light on.
  • Usually no symptoms at all.

Likely causes of the P1457 code

  1. Canister vent valve. The most frequent cause on Honda.
  2. Cracked canister. Confirm it with the tests in the diagnosis section.
  3. Canister hoses. Check for cracks and clamps, especially in the hot areas.
  4. EVAP bypass valve. Check it by commanding it with the scan tool.

How to diagnose the P1457 code step by step

  1. Inspect the vent valve under the vehicle, near the canister.
  2. Run a smoke test to find the leak.
  3. Command the valves with the scan tool and confirm they respond.

How to fix the P1457 code

  • Replace the vent valve or the canister.
  • Repair the hoses.

Technical reference data

  • Typical vent valve resistance: 15 to 30 ohms.
  • P1xxx codes are manufacturer-specific: confirm the definition with a scan tool that supports your brand.
  • Reference values: check the manufacturer data for your vehicle.

Brand-specific notes

The canister and vent valve sit low under the vehicle, so road debris, water and rust can get to them. Check there before you chase leaks near the tank.

P1457 on Honda

Very common on the Civic, Accord, CR-V, Fit and Odyssey.

If your vehicle is another brand, check the table above for the meaning its manufacturer gives this code and confirm it with a compatible scan tool.

Frequently asked questions about P1457

What does the P1457 code mean on a Honda?
It means there is a leak in the EVAP system on the canister side. It usually causes no symptoms.
Does P1457 mean the same thing on every brand?
No. It is a manufacturer-specific code, so on other brands it may not exist or may mean something different. Confirm it with a scan tool that supports your make.
Can I drive with a P1457 code?
Yes. A P1457 code does not affect how the car drives. You should still fix it to pass an emissions test.
How much does it cost to fix P1457?
Roughly $40 to $500 on a Honda. A vent valve is the lower end, and a new canister costs more.
Will a P1457 code clear itself?
Not while the leak or the faulty vent valve is still there. After a repair, clear the code and drive normally so the system can retest itself.
What is the most common cause of P1457?
The canister vent valve is the most frequent cause on Honda. A cracked canister and damaged hoses come next.

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