The brand meaning of the P20AB Code is necessary for resolving the vehicle engine problem. Do not drive the car until the problem from the car engine is solved. You have to get the meaning what meaning of the code is set by the manufacturer for this code P20AB. The general meaning of the code is not very helpful and you will get much information about the code from the dictionary meaning. You must rely on the genuine meaning of the code for solving the engine problem. The general meaning of the code is available online and you can use google to find the general meaning of the code.