It can, if the cars computers have not had enough time to do all of their self diagnostics it will fail smog. They don't want you resetting the light on your way to the test.
The service engine light has to be reset with a scanner. Disconnecting the battery will not work. The light will come back on unless you make the necessary repairs.
If your engine light has come on for your 1993 GMC Jimmy, you need to take you car in for service. You should make sure that you have enough oil in your car.
make sure your gas cap is on tight. sometimes this will make your check engine light come on.
you should have your engine checked out to make sure everything is working well
To reset the service engine soon light on a 2006 Mercury Mountaineer, you can buy a scan tool. Make sure you note down the numbers before scanning.
A faulty temperature sensor can cause the ECm to think your engine is overheating, this turning the heat light on constantly. You should make sure that your engine isn't in fact overheating though.
Check your gas cap. Make sure the seal is still good. This will cause the check engine light to stay on and is an easy fix.
First I would check the gas cap. If it's not tightened until it clicks several times it can make the check engine light come on.
its missing 4 cylinders sir!
Service engine lights need to be read with a code reader for your make and model. If the problem has already been fixed, you can reset the light by removing the appropriate fuse, or disconnecting the negative battery terminal for at least 30 seconds.
In the kitchen, turning the light on when we walk in.
A 1992 Regency has an OBD I system. The easiest way to reset a service engine soon light is to disconnect the battery and leave it disconnected for a minute or two. You will lose all of your radio presets though. CAUTION: Make sure that the problem is fixed before you reset the light because it will probably come back on.