Diagnostic Trouble Code
P0440 — EVAP Emission Control System Malfunction
EVAP Emission Control System Malfunction
Definition
A general malfunction has been detected in the EVAP (Evaporative Emission Control) system. This system captures fuel vapors from the tank and routes them to the engine for combustion rather than releasing them into the atmosphere.
Common Causes
- Loose, damaged, or missing gas cap
- Cracked or disconnected EVAP hose
- Faulty purge valve or vent valve
- Leak in the charcoal canister