code 12 means "no mulfunctions are recorded by ECM",no problems founded.You can not reset this code.
how to reset suzuki sx4
how i reset code on m109r suzuki
use a scan tool use a code reader either press reset. or pull dome fuse with 2min , put back. its reset.
plug in scan tool or code reading into OBD2 DLC 16 pin connector above right knee. press reset DTC. done.
1165
Go to a dealer
des it come p sec
if you have the code you should put the 4 digit code in the radio by pushing the radio # buttons then push power
place the Diagnostic jumper and read out the flashes. http://www.kick-fix.com/CEL/CEL.html this looks complex but it covers 89 to 95 FED and California cars. then post your DTC errors here. code 12 is normal , but you will have others. http://www.suzuki-forums.com/suzuki-sidekick-escudo-vitara-geo-tracker/
spydekick
Get the code off the radio card and punch in the numers on the radio pre set buttons with the radio and ign key on and the radio will come back to life.
unlock code:13560097