P0457 MAZDA EVAP Control System Leak Detected Fuel Filler Cap Loose/Off

Possible causes
– Damaged, missing or loosely installed fuel filler cap
Tech description
Check for a loose, missing or damage fuel filler the cap.
When is the obd code mean?
EVAP control system has a very large leak such as fuel filler cap fell off
– Engine Light ON (or Service Engine Soon Warning Light)
– Possible a noticeable fuel odor caused by the release of fuel vapors
– Fuel cap indicator lamp (FCIL) may be illuminated.
P0457 MAZDA OBD Code Description