Automotive Troubleshooting for the Verify Engine Light

1.     Find the vehicle's OBD-II port. This port is on the driver's side, below the dash . Ordinarily, the port is identified beneath the plastic dash console to the left of the steering wheel. The OBD II port matches the shape with the OBD II reader's 16-pin cable connection.

2.     Connect the OBD-II reader, or scan tool, to the OBD-II port. Turn the vehicle's ignition important towards the "Start" position, but do not turn the vehicle on. Access the OBD-II reader's menu to retrieve the diagnostic information. Before retrieving information, many code readers require specifying in the menu the automotive brand connected to the scanner. Specific instructions vary according to device brand and model.

3.     Allow the diagnostic reader to retrieve the diagnostic information from the vehicle's on-board computer. This may take several minutes. Codes display on the device when the process is complete.

4.     Interpret the code. Some readers display what each code means, while others only display a diagnostic code. Retrieve code interpretation with the OBD-II reader's user's manual or through the OBD-II website.

5.     Repair the problem the code indicates . Clear the code on the device. You may also clear the verify engine light by removing the battery cable and pressing the brake and horn to remove all residual stored electricity in the on-board computer. Using this method to clear the check engine light, however, will require the car's computer to relearn operating habits. If the problem causing the trigger is not cleared, the check engine light will return.