How do you reset engine idle?

To reset the engine idle, first, ensure the vehicle is in park or neutral and the engine is warmed up. Disconnect the battery for about 10-15 minutes to reset the engine control unit (ECU), then reconnect it. Start the engine and allow it to idle for a few minutes without any accessories on to let the ECU relearn the idle position. If necessary, consult the vehicle’s service manual for specific procedures related to idle adjustments.