2004 VOLVO XC70 Electronic Stability Control Esc Problems

I HAVE BEEN BRING MY CAR TO A VOLVO DEALER IN MY AREA FOR ABOUT 6 YEARS. I THOUGHT THAT I COULD TRUST THEM. STARTING IN 2014 I NOTICED THAT THE TRACTION CONTROL LIGHT WOULD APPEAR WHEN DRIVING DURING WET CONDITIONS AND IF I HIT A POTHOLE OF WHICH WE HAVE MANY HERE. I TOLD THE DEALERSHIP ABOUT THIS ON TO 2 DIFFERENT VISITS. BOTH TIMES THEY SAID THEIR WAS NO PROBLEM. WHEN I TOOK MY CAR TO AN INDEPENDENT REPAIR SHOP FOR A SECOND OPTION FOR AN ALTOGETHER DIFFERENT ISSUE, IT WAS DISCOVERED DURING A TEST DRIVE BY THE LEAD MECHANIC THAT MY CAR WAS NOT DRIVING IN AWD. THAT VOLVO DEALERSHIP AND THEIR MECHANICS PUT, ME AND MY FAMILY IN DANGER. UNFORGIVABLE. THIS ISSUE(S) OCCURRED WHILE DRIVING (IN MOTION) IN HEAVY TRAFFIC AS I LIVE IN A LARGE CITY AND WITH ELDERLY PASSENGERS AS I WAS A VOLUNTEER...

I HAVE A 2004 VOLVO XC70 WITH ONLY 53,000 MILES.ON JUNE 20TH, THE "REDUCED ENGINE PERFORMANCE" LIGHT CAME ON WITH NO APPARENT CHANGE IN HANDLING OR ACCELERATION. THE LIGHT THEN WENT OFF 20 MINUTES LATER. THE NEXT DAY AFTER DRIVING FOR ABOUT 20 MINUTES, THE LIGHT CAME BACK ON THIS TIME ALONG WITH THE "CHECK ENGINE" LIGHT, AND THERE WAS VIRTUALLY NO ACCELERATION. I GOT THE CAR TO LIMP ALONG AT ABOUT 5 MPH WITH THE HAZARD LIGHTS, AND IT FINALLY STOPPED SO I PUSHED IT ON TO THE CLOSEST PARKING SPOT. THE LIGHT WENT OFF F4 HOURS LATER AND I WAS ABLE TO DRIVE IT HOME. I THEN TOOK IT INTO THE SERVICE DEALER. THE MECHANIC RAN THE DIAGNOSTICS ON THE COMPUTER AND THE CODE FOR THE THROTTLE ACTUATOR APPEARED. THEY WERE GOING TO CHARGE ME OVER $1,000 UNTIL I INSISTED THAT IT WAS COVERED UNDER THE 7 YEAR...