1. Park your car in a safe location. Pull over to the side of the road in a well-lit area, away from traffic. Turn off the engine and set the parking brake.
2. Pop the hood of your car. Locate the hood release lever inside your vehicle, usually under the dashboard on the driver's side. Pull the lever to release the hood, then lift the hood and prop it open with the support rod.
3. Locate the negative battery terminal. The negative battery terminal is typically marked with a minus (-) sign. It is usually located on the side of the battery that is away from the engine.
4. Remove the negative battery cable. Use a wrench to loosen the nut or bolt that holds the negative battery cable to the terminal. Then, slide the cable off of the terminal and pull it away from the battery.
5. Wait 10 minutes. This will allow the power in the car's electrical system to drain, which will reset the check engine light.
6. Reconnect the negative battery cable. Slide the negative battery cable back onto the terminal and tighten the nut or bolt.
7. Start your car. Turn the key in the ignition and start the engine. The check engine light should be turned off.
Method 2: Use a OBD-II Scanner to Clear the Check Engine Light.
1. Purchase a OBD-II scanner. OBD-II scanners are available online and at most auto parts stores. Choose a scanner that is compatible with your vehicle.
2. Connect the scanner to your car's OBD-II port. The OBD-II port is usually located under the dashboard, near the steering wheel.
3. Turn on the scanner and your car. Follow the instructions that came with your scanner to turn it on and connect it to your car.
4. Select the "Read Codes" or "Scan Codes" option. This will display any diagnostic trouble codes (DTCs) that are stored in your car's computer.
5. Identify the DTC that is causing the check engine light. DTCs are typically five-digit codes, such as "P0420." You can look up the meaning of the DTC online or in a repair manual.
6. Clear the DTC. Follow the instructions that came with your scanner to clear the DTC. This will turn off the check engine light.
Note: If the check engine light comes back on after you have reset it, there may be a problem with your car that needs to be repaired. Take your car to a mechanic if the check engine light comes back on.
