Toyota RAV4 evap canister issue with gas cap code after replacement on Toyota RAV4

Some Toyota RAV4 owners report experiencing persistent EVAP canister issues even after replacing the gas cap. These problems are often associated with the P0440 code, which can be triggered by a leaking or loose gas cap, but may also stem from a damaged or leaking EVAP canister itself. Owners are advised to ensure the gas cap is tightly secured, as a loose cap is a common cause of EVAP leak codes. In cases where the canister is malfunctioning, replacing the entire unit along with its valves may be necessary, especially if charcoal pellets are clogging the vent valve. Additionally, some owners find that cracked rubber hoses or elbows in the system can contribute to leaks. To diagnose the issue, using an EVAP pressure tester can help locate leaks, and a thorough inspection of the entire EVAP system is recommended. It is important for owners to recognize that the EVAP system plays a vital role in controlling evaporative emissions, and that warning lights may also indicate other issues, such as a torn hose or leaking seal.