If you have a faulty ECU - Engine Control Unit, resetting the system can help rectify the issue in your Toyota. The process can be straightforward, especially if you’re a DIYer. Firstly, ensure to park in a safe place before commencing the ECU reset process. After that, turn off the car and open the hood. Locate the cable connected to the battery’s negative terminal and unhook it. Allow the system to sit without the battery for up to 15 minutes. Then, reconnect the battery. This will automatically reset the ECU.