1998 LEXUS LS400 Power Trainautomatic Transmissioncontrol Module Tcmpcmtecm Problems

DRIVING UNDER NORMAL CONDITIONS, TRACTION CONTROL WARNING BEEPER AND LIGHT WOULD COME ON, CAR WOULD SWERVE AS BRAKES AND ACCELLERATOR WOULD ACTUATE WITHOUT INPUT FROM DRIVER. THIS HAPPENED FOUR TIMES OVER THE PAST YEAR. EACH TIME CAR WAS TAKEN TO DEALERSHIP. THEY SAY THEY CAN'T DUPLICATE THE PROBLEM SO TAKE CAR BACK AND BRING IT IN WHEN IT DOES IT AGAIN. WE HAVE DONE THAT 4 TIMES NOW. PROBLEM DOES NOT GET FIXED. WHILE WE CAN'T PREDICT WHEN IT WILL OCCUR, THE SWERVING WAS MORE PRONOUNCED ON THIS LAST EPISODE AND ALMOST CAUSED VEERING INTO ON-COMING TRAFFIC. THIS CAR IS NOW IN THE DANGEROUS LIVES THREATENING PROBLEM CATEGORY. WHILE EVERYONE AT LEXUS WE HAVE CONTACTED IS POLITE, ETC. THE PROBLEM DOES NOT GET SOLVED AND THEY WANT US TO TAKE THE CAR BACK AND, "BRING IT IN WHEN IT HAPPENS AGAIN." THAT IS NOT A SOLUTION, IT IS A HAND...

AUTOMATIC TRACTION CONTROL LIGHT COMES ON, THERE IS A BEEPING SOUND, AND VEHICLE SWERVES LIKE IT IS GOING INTO A CURVE, USUALLY TO LEFT. PROBLEM WILL OCCUR RANDOMLY OVER 40 MPH, WEATHER CONDITIONS DO NOT PLAY A FACTOR IN DEFECT. *AK CONSUMER STATES WHEN PROBLEM OCCURS, THE ACCELERATOR, BRAKES, AND STEERING ARE ACTUATED WITHOUT ANY INPUT FROM THE DRIVER AND PROBLEM IS NOT WEATHER RELATED, DEALER HAS KEPT VEHICLE LONG PERIODS OF TIME, ONE INSTANCE FOR ALMOST 1 MONTH, ALWAYS COMES BACK AND CAN NOT FIGURE OUT THE PROBLEM, CONSUMER FEELS THE PROBLEM IS RELATED TO COMPUTER OR SENSOR DEFECT. *SLC