In this case, the last digits are 20, which means that there is a problem with catalyst efficiency in Bank 1.Īll this is only to explain the structure of the OBD2 codes. The last digits tell us what type of error code in the emission category it is. If we look at the next number, we can find that it tells us that there is an emission control problem. If we check the table below, we can find out that it tells us that there is a problem in the drive train = P The next number tells us that it is a general error code, which means that this error code applies to all car manufacturers. This is a typical error code and we can find out its meaning. So what is the logical structure of the error codes we are talking about?īelow is a very common error code called P0420. Read the trouble codes at home Description of the OBD2 codes
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