Common causes for a check engine light in a vehicle of that era include:
* Loose or damaged gas cap: This is a frequent and easily fixable cause.
* Failing oxygen sensor: These sensors monitor the air/fuel mixture and can cause the light to come on if malfunctioning.
* Mass airflow sensor (MAF) issues: The MAF sensor measures the amount of air entering the engine. A dirty or faulty sensor will affect the fuel mixture.
* Spark plug or ignition coil problems: Misfires can trigger the light.
* Catalytic converter issues: A failing catalytic converter can cause a variety of problems, including illuminating the check engine light.
* Other sensor malfunctions: Numerous sensors monitor various engine parameters. A fault in any of these could trigger the warning.
To find the exact reason, you'd need to:
1. Use an OBD-II code reader: This device will retrieve diagnostic trouble codes (DTCs) stored in the vehicle's computer. These codes provide clues as to the specific problem.
2. Consult a repair manual: A repair manual specific to a 1997 Ford Explorer will help in interpreting the codes and troubleshooting the issue.
3. Take it to a mechanic: A qualified mechanic can diagnose and repair the problem.
Ignoring the check engine light is not recommended, as continuing to drive with a serious engine problem could cause further damage.
