The gist of the P20B2 Code is vital for resolving the automobile engine and you can get the genuine meaning of the P20B2 code from the car brand but the general meaning is found online. The dictionary meaning of the code does not offer much necessary information. So, read the manual of the automobile or get information of the code according to the manufacturer and model number of the car. Do not try to fix the car engines if you are sure about the problem. You cannot resolve the problem from the car engine and you may transfer more problem in the car engine.