Here are the ways to clear the codes:
* Using an OBD-II Scanner/Code Reader: This is the most reliable method. Buy a relatively inexpensive OBD-II scanner from an auto parts store. Plug it into the OBD-II port (usually under the dashboard, often near the steering column), and follow the instructions to read and clear the codes. This will erase the codes, but it won't fix the underlying problem. The codes will reappear if the problem persists.
* Disconnecting the Battery: This is a less reliable method. Disconnect the negative (-) battery terminal for at least 15-20 minutes (some recommend up to an hour). Reconnect the terminal. This often clears the codes, but it's not guaranteed and can sometimes erase other important settings stored in the PCM. It's best used only if you don't have access to an OBD-II scanner. Note: After disconnecting the battery, you may need to reprogram your radio and reset your clock.
Important Considerations:
* Check Engine Light: If the Check Engine light is on, clearing the codes without addressing the underlying problem is only a temporary solution. The light will come back on. You should use the OBD-II scanner to identify the specific trouble code(s) so you know what needs fixing.
* Underlying Problem: The most crucial step is to *diagnose and fix the problem causing the trouble codes* in the first place. Simply clearing the codes without fixing the root cause could lead to more significant issues down the road.
* State Inspection: In some states, clearing codes yourself without addressing the problem might cause issues during emissions testing.
In short, while you can "reset" the system by disconnecting the battery or using a scanner, the real solution involves using a scanner to identify and fix the problem that triggered the codes. Investing in an OBD-II scanner is a worthwhile investment for any car owner.
