How do you reset check engine light on Ford Windstar?

You can't simply reset a Ford Windstar's check engine light. The light illuminates because the car's onboard diagnostic system (OBD-II) has detected a problem. Resetting the light without addressing the underlying issue is pointless and potentially dangerous. The problem will likely return, and ignoring it could cause further damage to your vehicle.

Here's the proper procedure:

1. Diagnose the problem: Use an OBD-II scanner (available at most auto parts stores) to read the diagnostic trouble codes (DTCs). These codes will tell you what the problem is. You can also take your Windstar to a mechanic or auto parts store for a free code scan.

2. Repair the problem: Once you know the code(s), address the underlying issue. This might involve replacing a sensor, fixing a leak, or performing other repairs.

3. Clear the code (after repair): After you've fixed the problem, *and only after*, you can clear the code. Many OBD-II scanners have a "clear codes" function. Some auto parts stores will clear the code for you after a repair. Alternatively, disconnecting the battery's negative terminal for about 30 minutes might clear the code, but this isn't guaranteed and may not work on newer models.

Important Considerations:

* Driving with a check engine light on is not recommended. It indicates a potential problem that could lead to more serious issues or even safety hazards.

* Generic OBD-II scanners are often sufficient, but more advanced scanners may provide more detailed diagnostic information.

* If you're not comfortable performing repairs yourself, take your Windstar to a qualified mechanic.

In short: Focus on fixing the problem, not just the light. The check engine light is a warning sign; ignoring it could cost you more money in the long run.