Here's a breakdown of how to approach this:
1. Diagnose the Problem:
* OBD-II Scanner: The most crucial step is to get the trouble codes read. The "Service Engine Soon" light is triggered by diagnostic trouble codes (DTCs) stored in your car's computer. You'll need an OBD-II scanner (available at most auto parts stores, even relatively inexpensive ones will work for this). Plug it into the OBD-II port (usually under the dashboard), and it will read the codes. Write these codes down – they'll be crucial for figuring out what's wrong.
* Possible Causes (based on a sudden shutdown): Several issues could cause this, including:
* Crankshaft Position Sensor (CKP Sensor): A faulty CKP sensor prevents the engine from knowing where the pistons are, leading to a no-start condition. This is a common cause of sudden shutdowns.
* Cam Position Sensor (CMP Sensor): Similar to the CKP sensor, a faulty CMP sensor disrupts engine timing and can cause a shutdown.
* Fuel Pump Relay or Fuel Pump: A problem with the fuel pump or its relay will prevent fuel from reaching the engine.
* Ignition System Problems: Issues with the ignition coil, distributor (if equipped), or spark plugs/wires could prevent ignition.
* Mass Airflow Sensor (MAF Sensor): While less likely to cause an immediate shutdown, a faulty MAF sensor can drastically affect the engine's performance and potentially lead to stalling.
* Low Oil Pressure: Extremely low oil pressure will trigger a shutdown to prevent catastrophic engine damage. Check your oil level immediately. (Low oil is a very serious issue.)
2. After Getting the Codes:
* Search Online: Once you have the trouble codes, search online (e.g., Google, forums dedicated to Dodge Neons) for the meaning of those specific codes. This will give you a much better idea of the likely culprit.
* Repair: Based on the codes and your research, you can either:
* DIY Repair: If you're mechanically inclined and comfortable working on cars, you might attempt the repair yourself. However, ensure you have the right parts and tools before starting. A repair manual specific to your 1997 Dodge Neon will be incredibly helpful.
* Professional Mechanic: If you're not comfortable doing it yourself, take your car to a trusted mechanic. They'll have the tools and expertise to diagnose and fix the problem correctly.
Important Considerations:
* Safety First: Work on your car in a safe, well-ventilated area. Never work under the car without jack stands.
* Oil Level: Check your oil level *immediately*. Low oil can cause severe engine damage.
* Battery Voltage: A low battery could contribute to some of these issues. Check the voltage using a multimeter.
Ignoring this problem will likely lead to more significant damage and higher repair costs. Getting the trouble codes is the single most important step to finding the solution.
