How do you reset the check engine light on a 1996 geo prizm?

To reset the check engine light on a 1996 Geo Prizm, you can disconnect the negative battery terminal for about 15 minutes. This will clear the engine codes and reset the light. Alternatively, you can use an OBD-I scanner to clear the codes if you have one. Just ensure any underlying issues are resolved to prevent the light from coming back on.