How do you reset the computer on a 2000 Mustang?

A 2000 Mustang doesn't have a "computer" in the sense of a device you can reset like a desktop PC. What you likely mean is resetting the Powertrain Control Module (PCM), also known as the Engine Control Unit (ECU). This is the computer that manages the engine's functions. There are a few ways to do this:

* Disconnecting the Battery: This is the most common and usually effective method. Disconnect the negative (-) terminal of the battery for at least 30 minutes (some recommend longer, even overnight). This clears the PCM's memory. Reconnect the negative terminal afterward. The car might need a few minutes to relearn your driving habits.

* Using a Scan Tool: More advanced scan tools can offer a "reset" or "clear codes" function. This method clears trouble codes and resets adaptive strategies, often more thoroughly than simply disconnecting the battery. You'll need an OBD-II scanner compatible with your Mustang's year.

Important Considerations:

* Safety First: Always disconnect the negative terminal first. Always be careful working around car batteries; they can produce sparks and dangerous chemicals.

* Radio Codes: Disconnecting the battery will likely erase your radio presets. You may need your radio code to reactivate it. This code is usually found in your owner's manual.

* Adaptive Learning: After resetting the PCM, the car's computer will need time to relearn your driving habits. You might notice some slight changes in performance for a short period.

* Underlying Problems: If you're resetting the PCM due to a specific problem, it might just be a symptom of a larger issue. The problem might return if it isn't addressed.

If you're experiencing a specific problem with your Mustang, disconnecting the battery might help temporarily, but it's best to diagnose the root cause using a scan tool and/or seeking professional help from a mechanic.