1998 Nissan Sentra mileage: 21,000. The "Check Engine Soon" light came on the other night, but the car seems to run fine. One of my friends says it's probably just that I need more anti-freeze or coolant. Is this right? This is Michigan and its about 10 degrees F during the night.
The check engine light will light when there is a malfunction in the engine management system. The fault code is then stored in the computer. You can buy your own scanner and clear the codes when the failed parts are replaced. The computer must be scanned to retrieve these stored faults to pinpoint the malfunctioning component. Because the check engine light indicates something is wrong, a trip to you neighborhood automobile service center sooner rather than later is recommended.