1. Purchase or borrow an OBD-II scan tool. This is a device that plugs into your car’s diagnostic port and allows you to read and clear trouble codes. You can find OBD-II scan tools at most auto parts stores and online retailers.
2. Connect the scan tool to your car’s diagnostic port. The diagnostic port is usually located under the dashboard, near the steering wheel.
3. Turn on the ignition. Do not start the engine.
4. Select the “Read Codes” option on the scan tool.
5. The scan tool will display the trouble codes that are stored in your car’s computer.
6. Select the “Clear Codes” option on the scan tool.
7. The scan tool will clear the trouble codes from your car’s computer.
8. Start the engine and check the check engine light. If the light is still on, you may need to have your car diagnosed by a professional mechanic.
Method 2: Disconnecting the Battery
1. Open the hood of your car.
2. Locate the negative battery terminal. This is the black terminal with a minus (-) sign.
3. Use a wrench to loosen the nut that holds the negative battery cable to the terminal.
4. Remove the negative battery cable from the terminal.
5. Wait for at least 10 minutes. This will allow the power in your car’s computer to drain.
6. Reconnect the negative battery cable to the terminal.
7. Tighten the nut that holds the negative battery cable to the terminal.
8. Start the engine and check the check engine light. If the light is still on, you may need to have your car diagnosed by a professional mechanic.
