P0456
EVAP Control System Leak Detected Very Small Leak
Generic code
Auxiliary Emissions Control
Low severity
Hard repair
Free on OBD DashX
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What P0456 means
- “The fault code P0456 indicates that there is a very small leak detected in the evaporative emission (EVAP) system. This system is responsible for controlling gasoline vapors from the fuel tank. A small leak may cause increased emissions and poor fuel economy.”
Possible symptoms
- Illuminated check engine light
- Increased emissions
- Poor fuel economy
Possible causes
- Loose or damaged gas cap
- Faulty EVAP system hoses or connections
- Leaking or damaged EVAP system canister
- Faulty purge valve or 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 gas cap
- Inspect and repair any damaged or disconnected hoses or connections
- Replace the EVAP system canister if leaking or damaged
- Replace the purge valve or pressure sensor if faulty
Free on OBD DashX
P0456 on OBD DashX
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