Here's what you should do:
* Get the codes read: This is the most crucial step. You can do this in a few ways:
* Auto parts store: Most auto parts stores (like AutoZone, Advance Auto Parts, etc.) will read the codes for free. They'll usually print out a description of the code(s).
* OBD-II scanner: You can buy a relatively inexpensive OBD-II code reader at an auto parts store or online. This allows you to read the codes yourself, anytime. For a 1996 vehicle, make sure it's compatible with OBD-I or OBD-II (some scanners only work with OBD-II).
* Mechanic: A mechanic will have the equipment to read the codes and diagnose the problem. This is the most expensive option, but often the most reliable.
* Once you have the codes: Search online for the code(s) you've received. Many websites provide explanations of what the codes mean. Be aware that the meaning can vary slightly depending on the specific vehicle.
* Common causes (but not guaranteed without the codes): Some common causes for a "Service Engine Soon" light on older cars include:
* Mass Air Flow (MAF) sensor: Measures the amount of air entering the engine. A faulty sensor can lead to poor performance and the light illuminating.
* Oxygen (O2) sensor: Monitors the amount of oxygen in the exhaust. A bad sensor can affect fuel efficiency and emissions.
* Catalytic converter: If this is malfunctioning, it can cause various issues, including emissions problems.
* Spark plugs or wires: Worn-out spark plugs or faulty wires can cause misfires.
* Loose gas cap: Surprisingly, a loose or damaged gas cap can trigger the light. Check this first, it's an easy fix.
* Other sensors: There are many other sensors in the engine that could be malfunctioning.
Don't ignore the light. Driving with a check engine light on can lead to further damage to your engine or cause it to fail prematurely. Get the codes read and address the underlying problem as soon as possible.
