Have Toyota Questions? Ask a Mechanic for Answers ASAP
Welcome to JustAnswer.com! My name is DriveFast71(Ron) and I will do my best to answer all of your questions completely and accurately.
The P0450 is a fairly straight forward code pointing to a fault in the EVAP Vapor Pressure Sensor. Inspect the electrical connector for any loose or broken wires. Inspect the vacuum lines for any crack, holes, or disconnections. If the visual inspection checks ok, suspect a faulty sensor, and replacement should solve the problem. It's located under the hood, top of the engine, towards the driver's side.