The powertrain control module is designed to last throughout the life of the vehicle. However, like any other component, it is subject to wear and tear and can go bad over time. The frequency at which a PCM goes bad can vary depending on a number of factors, including the quality of the component, the age of the vehicle, and the driving conditions. In general, it is rare for a PCM to go bad, but it is not uncommon for it to happen after several years of use.