Slide the cable clamp off of the negative battery terminal step 3 wait 5 minutes and reconnect the battery cable and then tighten the retaining nut with the socket wrench turn the ignition on and wait for the service engine soon light to blink and shut off. How to turn off a check engine light on a nissan by susan raphael service engine soon light on the dashboard turns on to indicate that theres an issue that needs attention when you take your car in for repair mechanics can then read codes from the ecu to determine what specific problems exist. Just a tutorialif you havent already please subscribe to this channel and if any of the content has helped you please give me a thumbs up also if you w. The service engine soon light can come on for minor issues like a loose gas cap or for more major problems such as possible engine failure your service engine soon light should not cause you to panic the light does say service engine soon but you may not necessarily have to make any major repairs soon one thing you can do right away is