P0457
EVAP Control System Leak Detected Fuel Filler Cap Loose/Off
Generic code
Auxiliary Emissions Control
Low severity
Hard repair
Free on OBD DashX
Want real-world data on P0457?
See which problems come with P0457, how often it shows up in other vehicles, and how to fix it — step by step.
- Real-world fix data
- How often it happens
- Step-by-step repairs
What P0457 means
- The fault code P0457 indicates that there is a leak in the evaporative emission system, specifically due to a loose or missing fuel cap. This can cause fuel vapors to escape into the atmosphere and may result in a failed emissions test.
Possible symptoms
- Illuminated check engine light
- Failed emissions test
- Smell of gasoline or fuel vapors around the vehicle
Possible causes
- Loose or missing fuel cap
- Cracked or damaged fuel filler neck
- Damaged or disconnected hoses in the evaporative emission system
- Faulty fuel tank pressure sensor
Related parts
- Evaporative Emission (EVAP) System: The EVAP system prevents petrol vapors from escaping into the atmosphere from the fuel tank and fuel system. Problems in this car's flow valve will lead to fuel loss
Possible solutions
- Check and tighten or replace the fuel cap
- Inspect and repair or replace any damaged components in the evaporative emission system
- Reset the check engine light and monitor the system for further issues
Free on OBD DashX
P0457 on OBD DashX
Real-world causes, how often this code shows up, and the fix — step by step.
Open P0457 No sign-up needed · available in 10 languagesScan your own car
Read and clear fault codes, live data and service resets with the CaRPM app.