Jeep
EVAP leak detected: fuel cap loose or off.
P0457 fault code: what it means
P0457: EVAP leak caused by a loose or missing fuel cap.
Usual causes, most likely first
- loose fuel cap
- worn fuel cap seal
- missing fuel cap
- damaged filler neck seal
P0457 by make
Subaru
Evap leak detected that points to the fuel cap being loose or off.
Not sure what P0457 means on your car? Ask Credov.
Before you clear it
Write the code down or photograph the scanner first. A code that comes straight back after clearing points to a fault that is still there. A car whose codes were cleared just before you arrived may be hiding one: the scanner's readiness monitors show "not ready" for a while after codes are cleared.
Researched by Credov from manufacturer and workshop sources. A fault code points to where a fault may be; a workshop confirms it with a diagnosis. Browse all fault codes.