Here's what you should do:
1. Don't panic (yet). While it often indicates a problem, sometimes it's a minor issue.
2. Check your owner's manual: The manual might have a section on the SES light, offering some basic troubleshooting or possible causes common to your specific Astro model year.
3. Get the code read: This is the crucial step. The SES light is triggered by a diagnostic trouble code (DTC) stored in the vehicle's computer. You have a few options:
* Auto parts store: Most auto parts stores (like AutoZone, Advance Auto Parts, etc.) will read the code for free. They'll give you a code number (or a description of the likely problem), which you can then use to research the issue further.
* OBD-II scanner: You can buy a relatively inexpensive OBD-II code reader (available at auto parts stores or online). This allows you to read and clear codes yourself. However, interpreting the codes still requires some knowledge.
* Mechanic: A mechanic can read the codes and diagnose the problem, offering a much more comprehensive solution. This is often the best and safest option, especially for older vehicles.
4. Once you have the code(s): Research the code(s) online. Many websites and forums (like those dedicated to Chevy Astros) provide explanations of common codes and possible solutions. *Be cautious* about relying solely on online information – it's best to consult a mechanic for confirmation and proper repair.
5. Address the problem: Based on the code and your research (or mechanic's diagnosis), address the underlying issue. This might involve a simple fix like tightening a gas cap, replacing a sensor, or performing more extensive repairs.
Important Considerations for a 1995 Astro:
* OBD-II Compatibility: While 1996 was the year OBD-II became mandatory, some 1995 vehicles may have a form of OBD-I or a transition system. This might affect the type of scanner needed to read the codes. Check your owner's manual to see if this is an issue for your Astro.
* Age of the Vehicle: A vehicle this old might have multiple issues contributing to the SES light. A mechanic will be better equipped to diagnose and address potential underlying problems.
In short: Get the code read. That's the only way to know for sure what's causing the light to illuminate. Ignoring it could lead to bigger, more costly problems down the road.
