Nissan vehicles come equipped with an ECU, or Engine Control Unit, which is a computer that monitors all of the vehicle's functions. When you see the Check Engine light illuminate on your instrument cluster, you should have the vehicle looked at by a qualified mechanic immediately. Once any repairs are made, then you can manually reset and turn off the engine light yourself right from your home garage. It requires no special tools and only a couple of minutes of your time.
Get into the vehicle and put the key into the ignition. Turn the vehicle on but don't start the engine.
Press on the accelerator quickly five times in five seconds and release the pedal. Make sure you press the pedal all the way down to the floor of the vehicle. Wait for about 10 seconds.
Push the pedal all the way to the floor and hold it for 10 seconds or until the engine light flashes on and off. Release the pedal.
Repeat step 3.
Turn the ignition off and wait 3 minutes. Turn on the engine. The engine light should now be off.