On old cars (pre 1998) you can usually reset the light by unattaching the battery ground terminal and waiting 30 seconds and reattaching it. On anything newer, there is a code exclusive to the make of the car and unfortunately a dealer will have to give it to you or send it to your ecm (ECU) for you. Even auto body shops have to ask for this information from a dealer!
Reference: R&D experience for a major auto maker and my personal car experience.
disconnect the battery for 15 seconds then reconnect.
turn ignition switch on but dont start. disconnect the negetive battery terminal then reconnect it
Either have the problem that is causing the light to illuminate fixed or disconnect and reconnect your battery.
Disconnect the battery for a half hour and then reconnect, it should reset the engine light.
disconnect the positive battery post and wait five minutes , then reconnect battery. The light should go out
Disconnect the battery wait a minute then reconnect this should turn the light off.
remove the negative cable from the battery for 10 min. reconnect it.. if its not gone take it to a mechanic
disconnect your battery and then reconnect. The light should reset and turn off.
Disconnecting the battery is the easiest way. Then disconnect the airbag.
The airbag light in the 2003 GMC ENVOY can be reset by disconnecting the battery for about 5 minutes. Then reconnect the battery, turn the key to on without starting the vehicle, and pump the gas pedal three times if the light is still on after reconnecting the battery.
To turn off the check engine, disconnect the positive battery cable for 30 seconds, then reconnect.
The airbag system is sensitive to resistance in the circuit. Apparently, even a short term increase in resistance will set the airbag light. An Audi shop with a VAG-com test unit can tell which part of the system is setting the light. The most common is the seat mounted airbags. The usual repair is to make sure you have your radio security code, disconnect the battery (remember that you are working with the detonators for small explosive charges), disconnect the floor connection, clean the contacts with electrical contact cleaner, reconnect them and secure with a zip tie. Then reconnect the battery, enter the radio security code and turn off the light using the VAG-Com. A lazy man's way (it worked for me) is simply to turn off the light when it is tested and see if it returns. The change is resistance may have been transitory. Good luck.