Here's the proper approach:
1. Get the Diagnostic Trouble Code (DTC): You need to find out *why* the light is on. This is done using a scan tool, also called an OBD-II code reader. These are relatively inexpensive and available at most auto parts stores. Plug it into the OBD-II port (usually under the dashboard, often near the steering column). The reader will display a code (or multiple codes) that corresponds to a specific problem.
2. Identify the Problem: Once you have the DTC, look up the code online (many free resources are available) or in a repair manual specific to your 2001 Chevy Prizm. This will tell you what the car's computer thinks is wrong.
3. Repair the Problem: Fix the issue identified by the DTC. This could be anything from a loose gas cap (a common cause) to a more serious problem requiring professional repair.
4. Clear the Code (After Repair): *Only after you've repaired the problem*, you can clear the code. Many OBD-II scan tools have a function to clear the codes. Some auto parts stores will clear the code for free if you bought a part from them.
Important Considerations:
* Don't just clear the code without fixing the problem: The light will likely come back on, and the underlying issue could worsen.
* If you're not comfortable working on your car yourself, take it to a qualified mechanic. Misdiagnosing or improperly repairing the issue could lead to more significant problems.
* The "check engine" light is not always a major problem, but it should never be ignored.
In short: Fixing the underlying problem is the only way to reliably and safely clear the check engine light. Clearing the code without addressing the root cause is simply masking a problem.
