Mass air flow sensor

Depending on what the code was it may require the adaptives to learn again before it will set the code again. When you disconnect the battery it wipes all the memory in the modules and a lot of codes will not set until it relearns the vital data. This usually takes multiple drive cycles, meaning it needs to run up to operating temp and then go through a shift sequence multiple times in a row.

In short, this is probably not enough driving if it is one of these codes.