Depending on your area, you can go to your local AutoZone, and they can sometimes reset your light. But in some areas, laws wont allow them too. My local AutoZone is like this, but if you hold their little code scanner, and ask them which buttons to press to reset it, its you that reset it and not them. Some will do this, but not all.
The check engine light on a Buick Regal can be reset with a special diagnostic scanner. This can be performed at a car dealership or service garage.
You can only reset it with an OBDII diagnostic scaner
Disconnect the negative battery cable for 10 seconds.
The 2002 Buick Regal has a V6 engine.
The 2003 Buick Regal has a V6 engine.
The 2004 Buick Regal has a V6 engine.
The 2001 Buick Regal has a V6 engine.
The 2011 Buick Regal has an inline 4 engine.
The 2012 Buick Regal has an inline 4 engine.
The 2013 Buick Regal has an inline 4 engine.
The 2014 Buick Regal has an inline 4 engine.
The 2004 Buick Regal has a 3.8 L base engine size.