2015 FIAT 500 Electronic Stability Control Esc Problems

WE HAVE RAN INTO TWO ISSUES WITH THE CAR. THE FIRST ISSUE WAS LAST YEAR THERE WAS AN ISSUE WITH THE COMPUTER INSIDE NOT WORKING WHICH IN TURN CAUSE ISSUES WITH THE BLUETOOTH, LIGHTING, AND DASHBOARD. THE MECHANIC SAID IT COULD IN TURN RESULT IN OTHER ISSUES AS WELL. WE RECENTLY STARTED THE CAR AND IT STARTED SHAKING, THE DASHBOARD WENT OUT, THE CHECK ENGINE LIGHT CAME ON, AND THEN THE POWER STEERING WENT OUT.

ON SEVERAL OCCASIONS, MY CAR HAS SUDDENLY REVVED UP TO 6000 RPM, START JERKING AND REVVING UP; AND A RANDOM ERROR WILL POP UP ON THE DASH. WHEN THIS HAPPENS, IF YOU LET OFF OF THE BREAK THE CAR WILL AUTOMATICALLY SPEED UP TO 40 MPH WITHOUT PUSHING THE GAS PEDAL DOWN. SOMETIMES IT WILL HAPPEN WHILE DRIVING, AND SOMETIMES IT WILL START AS SOON AS THE CAR IS STARTED. IT DOESN'T MATTER WHAT KIND OF ROAD THE CAR IS ON. SOMETIMES THE CAR JUST JERKS AND DISPLAYS AN ERROR. THE MOST PREDOMINANT ERROR IS "ESC OFF NO HILL START". SOMETIMES IT SAYS "COOLANT TEMP HIGH". I HAVE TAKEN IT TO THE DEALERSHIP SEVERAL TIMES AND EVERY TIME I DO THEY SAY THEY ARE UNABLE TO "RETRIEVE AN ACTIVE CODE OFF OF THE COMPUTER OR DUPLICATE THE PROBLEM." ONE TIME, THEY REPLACED THE COMPUTER IN THE CAR BECAUSE THEY READ...