Question

I have the engine code P0453 on my 2007 Toyota Prius, I put a used engine in and checked all connections still not finding the problem

Answer 1

HI there,

This code is for the evap emissions system pressure sensor circuit high.

I would have a smoke test done, you may have swapped a couple of vacuum lines which could create this type of issue with the system.

Answer 2

P0453 TOYOTA - EVAP System Pressure Sensor/Switch High Input
Read more: https://www.autocodes.com/p0453_toyota.html