2008 highlander P0300P0303P0305P0420P0456. VSC off, check engine, warning sign (!). Loss of power.

Question

Looking for parts to replace.
thank you in advance.

Answer 1

P0300 Random misfire

P0303 Misfire number 3 cylinder

P0305 Misfire number 5 cylinder

P0420 Catalytic below threshold Bank 1

P0456 Evap control system small leak detected

Clear the code. and retest. You may just possible have just one code such as the misfire affecting other cylinder. Then retest for codes,