2015 Buick Encore vehicle speed control problems

What owners report

• “The contact owns a 2015 Buick Encore. The contact stated that while driving at an undisclosed speed, the vehicle failed to accelerate as intended while depressing the accelerator pedal. In addition, the steering wheel seized. The traction control warning light and the power steering warning light was illuminated, and the message to “Contact Dealer for Service” was displayed. The vehicle was towed to the dealer where it was diagnosed that one of the wiring harnesses connected with the CPU had fai…”

  NHTSA complaint · filed 07/31/2025

• “My car started surging when I was sitting at a traffic light and as I was crossing abridge The check engine light came on - 2 codes - transmission module 0700 and module 0073”

  NHTSA complaint · filed 12/29/2022

• “I HAD PURCHASED A 2015 BUICK ENCORE VEHICLE ON MARCH 03, 2020, THAT HAD A "NOT FOR SALE" YELLOW STICKER ON THE WINDSHIELD. I HAD NOTICE THAT THE VEHICLE MADE A THUMPING SOUND UNDER THE HOOD ON THE DRIVER SIDE WHEN RIDING ON THE HIGHWAY. I TOOK IT TO JOHNNY LONDOFF SERVICE DEPT., BUT WAS TOLD THAT NOTHING WAS WRONG WITH IT. IN ADDITION, TO NOTICING THAT THE VEHICLE WOULD ROLL BACKWARDS ON THE SMALLEST OF INCLINE. AS TIME WENT ON THE VEHICLE WOULD ROLL BACK, THEN ROLL FORWARD ON LEVELED GROUNDS WH…”

  NHTSA complaint · filed 01/03/2021

• “TRIED TO STOP BEFORE A RED SIGN ON A CITY STREET, THE CAR ACCELERATED ON ITS OWN, PASSED THE RED LIGHT AND RUN AT ABOUT 60 MPH ON A 35 MPH STREET FOR ABOUT HALF A MILE AND THEN STOPPED BY ITSELF. PRESSING THE BRAKES AND EVEN PUTTING IT ON PARK DID NOT HELP. I AM LUCKY TO BE ALIVE WITH MY TWO PASSENGERS, AND LUCKY NOT TO KILL ANYBODY OR CAUSE PROPERTY DAMAGE.”

  NHTSA complaint · filed 08/12/2019

• “THE CAR HAD BEEN PARKED IN AN UNHEATED GARAGE FOR MORE THAN 24 HOURS. I STARTED IT, PUT MY FOOT ON THE BRAKE PEDAL, AND PUT IT IN GEAR (R). THE CAR LUNGED BACK AT A HIGH RATE OF SPEED. MY FOOT WAS STILL ON THE BRAKE. TO AVOID HITTING A VEHICLE BEHIND IT IN THE DRIVEWAY, I SHIFTED TO DRIVE (D) AND THE CAR IMMEDIATELY STARTED FORWARD STILL AT A HIGH RATE OF SPEED. THE BRAKES DID NOT SLOW THE CAR DOWN. I BUMPED THE FRONT WALL OF THE GARAGE AND AGAIN SHIFTED INTO R. THE CAR STARTED MOVING BACK AG…”

  NHTSA complaint · filed 04/05/2018 · crash

Unverified owner reports from NHTSA's public complaint database.

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