Turn off the battery
The first step is to turn off the car. Then, remove both the terminals of the battery using the battery wrench and remove the battery from the compartment. It ensures that no power flows while you are resetting the car computer along with letting you do some battery maintenance work as well.
Handling the battery wires
With both terminals removed from the battery, make sure to pair both the negative and positive wires connected to the engine with each other. Next, tie them together with a cable or an insulating tape.
Performing a soft reset
The soft factory reset includes cutting off the power to the computer and draining any pending current that might be inside the capacitor circuit. Once the computer has lost all power, it would lose any memory left. In the majority of cases, these would be the error codes, which would be cleared off too. It is an important step when you are resetting car computer.