P0457Severity: Low
P0457 – EVAP Leak (Loose Fuel Cap)
A leak in the fuel-vapor system — most often a loose fuel cap.
What it means
A large leak is detected in the EVAP system. The most common cause is a fuel filler cap that isn't fully closed or has a bad seal.
Symptoms
- Check-engine light
- Occasional fuel smell
- No driving effect
Common causes
- Loose/faulty fuel cap
- Cracked EVAP hose
- Faulty purge/vent valve
- Canister issue
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Frequently asked questions
What does trouble code P0457 mean?
P0457 – EVAP Leak (Loose Fuel Cap). A large leak is detected in the EVAP system. The most common cause is a fuel filler cap that isn't fully closed or has a bad seal.
Can I drive with a P0457 code?
It's usually not urgent, but finding and fixing the cause matters for emissions and fuel economy.