Toyota Prius C evaporation flow instability and large leak codes 441 and 445 with engine clicking noise on Toyota Prius C

Some Toyota Prius owners report experiencing issues related to codes P0441 and P0455, which indicate problems with the Evaporative Emissions System and a gross leak in the system, respectively. These codes can be triggered by various factors, including a bad vacuum switch, leaks in the EVAP system, or a faulty purge solenoid. Additionally, some owners report hearing engine clicking noises alongside these codes, which may suggest underlying problems with engine components such as valves or lifters. It is crucial for owners to address these issues promptly to prevent further damage to the engine and ensure the vehicle's proper functioning. Consulting a qualified mechanic for a thorough inspection and diagnosis is highly recommended.