What to do to reset check engine light on 1997 Oldsmobile achieva?

To reset the check engine light on a 1997 Oldsmobile Achieva, you can disconnect the negative battery cable for about 15 minutes to clear the engine control unit's memory. Alternatively, you can use an OBD-II scanner to reset the check engine light after addressing any underlying issues. It's important to ensure that any problems triggering the light are resolved before resetting it, as the light will likely come back on if the issue persists.