The meaning of the P20E5 Code is available as dictionary and manufacturer meanings. You need to know the manufacturer meaning for solving the car engine. The dictionary meaning of the code is not important thing for solving the car engine. You should collect the manufacturer meaning of the code. You will get that meaning in the engine manual but you need to recover the meaning according to your car brand. The common meaning of the code is available but it does not help you so much for solving the car engine. The dictionary meaning of the code is found online. You can use Google for searching the meaning.