Check engine lamp will only light on, if there is a problem with the engine. All cars have problems, when the check engine light is on. Problems arises due to neglected maintenance, such as oil changes. There is a Oil Change Reminder Lamp, that lights on when the next oil change is due (sometimes the engine oil lamp will turn on). They have that kind of feature when the auto manufacturers introduced the digital odometer (to prevent tampering of the odometer). That's the reason why everybody who has a digital odometer with a check engine light on (or Oil Change Reminder Lamp is on), freaks out, go to the dealer and reset it, after they did the simple oil change.