To address the check engine light properly, you need to:
1. Diagnose the problem: This is the crucial step. You'll need to use a code reader specifically designed for OBD I systems (the 1991 Fifth Avenue uses OBD I, not OBD II). These code readers are different from those for OBD II vehicles. Auto parts stores may have these, or you may need to find one online. The code reader will tell you the diagnostic trouble code (DTC) that the car's computer has stored.
2. Repair the problem: Once you know the DTC, you can consult a repair manual (Haynes or Chilton manuals are good resources) or an online resource like a forum dedicated to Chrysler Fifth Avenues to identify the likely cause and perform the necessary repair.
3. After Repair: Once the repair is complete, you *may* be able to clear the code using a code reader, but in some cases the light will clear itself after several drive cycles (the computer continuously monitors for the problem and will turn off the light if it no longer detects it).
Important Considerations:
* OBD I vs. OBD II: The methods for diagnosing and clearing codes are very different between OBD I (pre-1996) and OBD II (1996 and later) systems. Make sure you are using the correct tools and techniques for your vehicle's OBD I system.
* Professional Help: If you're not comfortable diagnosing and repairing car problems yourself, take your Fifth Avenue to a qualified mechanic. They'll have the tools and expertise to diagnose and fix the underlying issue, which is essential. Simply clearing the light without fixing the problem is dangerous and could lead to more serious engine damage.
Ignoring the check engine light is never recommended. It could indicate a potentially serious problem that could damage your car or even create safety hazards.
