Honda P1457: EVAP Canister Vent Leak — Fix
On Honda vehicles, P1457 means an evaporative emissions (EVAP) leak detected on the charcoal-canister side of the system.
- Applies to
- Honda vehicles
- Est. repair cost
- $30 – $350
- Time to fix
- 30 minutes – 2 hours
What it means
Causes include a faulty canister vent shut valve, cracked EVAP hoses, or a failed canister. P1xxx codes are manufacturer-specific — P1457 is defined by Honda (not part of the generic SAE J2012 set), so this definition applies to Honda vehicles. Model years can vary, so confirm against the Honda service manual. Fix the fault, then clear the code with a scan tool.
Symptoms
- Check engine light on
- No drivability effect
- Possible faint fuel smell
How to fix it
- 1
Inspect the canister and valve
1. Check the canister vent shut valve and its hoses. 2. Look for cracks or a failed canister.
- 2
Repair and clear
1. Replace the faulty valve/hose/canister, then clear the code.
Frequently asked questions
Is P1457 the canister or the tank side?
P1457 is the canister-side EVAP leak (vent shut valve/canister). Honda also has P1456 for the fuel-tank side.
Last updated July 19, 2026
Guidance only — always consult a qualified professional or the official service manual before carrying out repairs.