Question

What to do when having a P0451 and P0453 on the 2005 Toyota Highlander V6? Check engine light on.

Answer 1

You may have a problem with the EVAP System Pressure Sensor.

P0451 TOYOTA - EVAP System Pressure Sensor Range/Performance
Read more: https://www.autocodes.com/p0451_toyota.html

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