There are a number of methods people may use in an attempt to reset their check engine light, but some methods may be better than others. The check engine light comes on when the vehicle is in need of engine maintenance, perhaps an oil change. In many cases, its intervals are set by mileage, not because the car's computer detects anything wrong. However, if your check engine light is blinking, this is the sign of a serious problem.

If your check engine light is on for something as simple as an oil change or tune-up, ask the service station to reset your check engine light. Many will do this without even being asked, but some have to be reminded. Most can do it in a matter of seconds and will do so for no additional charge.

However, for those who do their own oil changes or who simply want to do it themselves, there are some options. The best way to reset the check engine light is with an automotive diagnostic scanner. These handheld devices connect easily to your car and read the vehicle's computer for any diagnostic codes that need attention. They can be bought for less than $100 US Dollars (USD). In addition, they can also be very useful when there is something more seriously wrong with your automobile.

Most people believe the check engine light can simply be reset by disconnecting the battery. In some cases, especially in older vehicles, this may be a successful method of resetting it. However, newer vehicles do have a feature that will simply turn the light back on after the battery is reconnected, if the battery is not disconnected and the car drained of electricity properly.

However, while it is not as easy to reset the check engine light by disconnecting the battery as it once was, it can be done. The key is to make sure all electrical power is totally drained from the vehicle. A way to do this is by constantly blowing the car's horn until it dies, then waiting several minutes. This will ensure all electrical current has been drained from the car's capacitor. At this point, it should be safe to reconnect the battery and the check engine light should not longer be lit.

When disconnecting the battery, there are a few inconveniences you may want to keep in mind. First, those having an anti-theft radio system may find that it goes into safe mode and will need a code to unlock it. This is provided in the information that came with your radio. Also, all station presets will need to be reprogrammed.

For those with more advanced cars, some car computers are set to "learn" your driving habits to determine when the best time to shift gears is for your driving style. It may take time for your car to go through this process again. During this time, the vehicle is likely to not perform as smoothly as the driver has become accustomed to.