P0457

EVAP System Leak Detected (fuel cap loose/off)

Severity

✅ Low

Can you drive?

Do not drive — repair immediately

Approx. repair cost

$6–56 (est.)

Symptoms

Check Engine Light Is On
The smell of gasoline in or near the car
Slight degradation in fuel economy

Causes

Loose or missing fuel cap
Damaged or worn EVAP hoses
EVAP purge valve malfunction
Leak in fuel tank

How to Fix

Check and close the fuel tank cap tightly
Inspect the EVAP system hoses for damage.
Check the EVAP system purge valve
Perform a leak test on the EVAP system

Related codes

P0440 P0442 P0455 P0456