On a 2000 Ford Expedition the engine light came on recently has had any known problems with this in past?

An engine light on a 2000 Ford Expedition doesn't automatically mean a catastrophic failure, but it *does* mean there's a problem the car's computer has detected. Since there's no history of past problems, it's impossible to say what's causing the light. Many things can trigger the check engine light, from something minor (like a loose gas cap) to something major (like a failing catalytic converter or engine sensor).

To determine the cause, you need to get the diagnostic trouble code (DTC) read. This can be done in a few ways:

* OBD-II Scanner: You can buy a relatively inexpensive OBD-II scanner at most auto parts stores. These plug into the car's OBD-II port (usually under the dashboard) and will read the DTCs. The code will be a number (or a series of numbers and letters), and you can look up the meaning online or in a repair manual.

* Auto Parts Store: Many auto parts stores will read the codes for free. They can then offer advice or parts to fix the problem. However, be aware they may try to sell you more than you need.

* Mechanic: A qualified mechanic will be able to read the codes, diagnose the problem, and perform the necessary repairs. This is the most reliable, but also most expensive, option.

Without knowing the DTC, any guess as to the cause would be pure speculation. However, common problems on 2000 Ford Expeditions that could trigger the check engine light include:

* Oxygen Sensor Issues: These sensors monitor the exhaust and help regulate fuel mixture. Failing oxygen sensors are a common cause of check engine lights.

* Mass Airflow Sensor (MAF) Problems: The MAF sensor measures the amount of air entering the engine. A faulty sensor can lead to poor fuel mixture and engine performance.

* Catalytic Converter Issues: These are expensive to replace, but a failing catalytic converter can trigger the check engine light.

* Ignition System Problems: Issues with spark plugs, ignition coils, or wires can cause misfires, leading to the check engine light.

* Evaporative Emission System (EVAP) Leaks: Leaks in the fuel system can trigger the light. A loose gas cap is a common and easily fixable cause.

In short: Get the code read. That's the first and most important step in troubleshooting your Expedition's engine light.