From Brutal, back in 2008.

CORRECT WHT, AND TO DO A HARD REBOOT YOU HAVE TO DISCHARGE THE CAPACITORS IN THE ECU(ALL ECUS) AND TO CORRECTLY DISCHARGE A CAPACITOR WHICH IS NOTHING MORE THAN A BATTERY YOU HAVE TO GIVE IT A PATH TO GROUND. TO DO THAT DISCONNECT THE NEGATIVE BATTERY TERMINAL FROM THE BATTERY AND MOMENTARILY TOUCH IT TO THE STILL CONNECTED POSITIVE, THIS GIVES ALL THE CAPACITORS A PATH TO GROUND AND WITH ERASES ALL VOLATILE MEMORY.(CK ENGINE LIGHT CODES ARE STORED IN NONVOLATILE SO THEY NO LONGER ERASE THIS WAY)SOMEBODY(JIM?) STICKY THIS SO IT DOESNT HAVE TO BE RETYPED ALL THE TIME(2ND TIME TODAY) AND YES LIKE FACTOTECH SAID, RESET, WINDOWS, CLOCK, SUNROOF, RADIO(MAKE SURE YOU HAVE CODE FIRST IF YOU HAVE AN ANTITHEFT UNIT) AND YOUR DONE. TO RESET CODES AND NOT GO TO THE DEALER, GO TO NEIGHBORHOOD AUTOPARTS STORE, MOST HAVE GENERIC SCANNERS THAT CAN TAKE CARE OF ALOT OF CODES THAT COMEUP, JUST WRITE EM DONE SO IF THEY RETURN YOU KNOW THE CAR IS CONTINUING TO SEE THE SAME PROBLEM