1. Park your car in a safe location and turn off the engine.
2. Locate the negative battery terminal. It is usually marked with a minus (-) symbol.
3. Loosen the nut on the negative battery terminal. You can use a wrench to do this.
4. Remove the battery cable from the negative battery terminal.
5. Wait for a few minutes. This will allow the car's computer to reset.
6. Reconnect the battery cable to the negative battery terminal.
7. Tighten the nut on the negative battery terminal.
8. Start the engine.
9. If the service engine soon light is still on, you will need to have it diagnosed by a mechanic.
Method 2: Use a Diagnostic Scanner
1. Purchase a diagnostic scanner. You can find these online or at auto parts stores.
2. Connect the diagnostic scanner to your car. The scanner will usually come with instructions on how to do this.
3. Turn on the ignition. Do not start the engine.
4. Follow the instructions on the diagnostic scanner to read the trouble codes.
5. Once you have read the trouble codes, you can use them to identify the problem with your car.
6. Repair the problem and then clear the trouble codes.
7. Start the engine.
8. If the service engine soon light is still on, you will need to have it diagnosed by a mechanic.
