P0457 on Ford Vehicles: EVAP Leak Detected (Fuel Cap Loose/Off)
The EVAP leak test found the system wide open — almost always a loose, missing or worn gas cap. P0457 →
7Complaints mentioning the code
#1Rank among 3 brands
0.3%Share of Ford DTC complaints
In NHTSA owner complaints we analyzed for Ford, P0457 was mentioned 7 times.
Notes by brand
Fords with the capless Easy Fuel filler report this condition as 'Check Fuel Fill Inlet'. Dirt on the spring-loaded flap is a common cause; when filling from a gas can, use the funnel supplied with the vehicle, since other spouts can hold the flap open or damage it.
Most mentioned models
| Ford Escape Hev | 2 | |
|---|---|---|
| Ford Fusion | 2 | |
| Ford Fusion Hybrid | 2 | |
| Ford Fiesta | 1 |
Model years mentioned
Components named in these complaints
- Fuel/propulsion System (6)
- Vehicle Speed Control (2)
- Engine (2)
- Power Train (1)
Often appears together with
P0455
Powertrain
The fuel vapor system can't hold vacuum at all — check the gas cap first, then hoses and valves.
Low
P2111
Powertrain
The throttle plate stayed more open than commanded – a real safety concern until you know why.
High
P2119
Powertrain
The throttle plate isn't reaching the position the PCM commands, or won't spring back to its…
Moderate
Possible causes
- Cap not tightened until it clicked, or left at the pump
- Worn, cracked or dirty cap seal
- Wrong or low-quality aftermarket cap
- Capless filler flap dirty, damaged or not closing
Related codes
Source: NHTSA Complaints API (US government open data), analyzed by DTC mention.