In conclusion, understanding the functions of ECU, PCM, and ECM is essential for maintaining your car's performance. By recognizing common issues and seeking reliable solutions at Flagship One, Inc, you can keep your vehicle running smoothly for years to come. Don't hesitate to contact their team for all your control module needs. The PCM, or Powertrain Control Module, is an integrated control unit that oversees multiple systems within the powertrain, including the engine, transmission, and e...