Power How to reset the power circuit of my cadillac sts 2001 ??

Code p0102, according to:

P0102 Cadillac Mass or Volume Air Flow Circuit Low Input

is "Mass or Volume air Flow Circuit Low Input"
Means that the computer isn't getting enough signal from your MAF sensor.

Check the link above for more information. MAF replacement isn't difficult.

Here's a link.http://www.autozone.com/autozone/repairinfo/repairguide/repairGuideContent.jsp?pageId=0996b43f80cb43e1

sorry but the 2000 STS does not have a reset for the fuel pump. you will need to run diagnostics on the fuel pump system to find why it is not working, the first thing to do is test for a 2 second power pules to the fuel pump when you turn on the key if there is then replace the pump, if not then it is time to start running some tests on the control circuits.

try unhooking the battery for a few minutes.

There is no "reset" new pads and sensors is the fix . If you have had this done but they didn't replace the sensors, it was done incorrectly.

you can fit as big as 20'' rims and tires

Which engine? Northstar V8's have the starter under the intake manifold. Not too difficult to replace though.

THE VACCUM OPERATED POWER BRAKE BOOSTER IS DEFECTIVE MOST LIOKELY.

this is a warning that there is a problem with the electronic traction control system, a part or circuit has failed, u will need to have the dealer test the system for a trouble code that will be stored in the control modules memory that will indicate were to look for the defective part, it will most likely be a wheel speed sensor, until the system light is out it is disabled.

you need to reset the codes... unhook the battery for about ten minutes... make sure you have the code for the radio (if required)