2018 Hyundai Ioniq Hybrid 5 HB FWD

There is a defect with the transmission control module (TCM) and dual-clutch transmission (DCT). This defect prevents the car from properly accelerating from a stop. The defect manifests in the following ways when pressing the accelerator: unresponsive or sluggish acceleration, jerking, shuddering, failure to shift, stalling and complete loss of power. Typically, the TCM defect manifests in two ways: shuddering/delayed brake release, which has happened over 20 times and loss of power/engine revving out of gear which has occured three times. These issues are unpredictable, unrepeatable and dangerous. I usually experience them while waiting at stop lights in busy intersections. Delayed and unpredictable acceleration and shifting could cause a traffic accident. I've notified the dealership three times and had it serviced once by licensed Hyundai technicians at the same dealership. They couldn't replicate the issue and claimed they had never heard of the problem. There are no warning lights when this issue occurs and the dealship said there were no diagnostic codes indicating the problem. Defective TCM & DCT software is a known issue that resulted in a recall campaign for the 2016 Hyundai Tucson. This issue has been documented in the following vehicles: 2017 Hyundai Elantra Eco, 2017 Hyundai Sonata Eco, 2016 – 2017 Hyundai Tucson, 2016 Hyunda Veloster Turbo. Hyundai issued the following service bulletins informing dealerships about the TCU software issue specific to the Tucson: #5NP-X7J3D-10, TSB# 16-01-035, #5NP- S9D9P-10

VEHICLE BATTERY IS DEPLETED AND NEEDS SERVICING OR REPLACEMENT.

THE CAR SHIFTS FROM DRIVE MODE INTO SPORT MODE BY ITSELF WITHOUT THE DRIVER MANUALLY MOVING THE GEAR SHIFT FROM DRIVE TO SPORT. THIS HAPPENS RANDOMLY, BUT ALWAYS WHEN THE CAR IS IN MOTION AND ALWAYS IN A LOW GEAR( USUALLY FIRST GEAR ). IT HAS HAPPENED BOTH WHEN MAKING A TURN AND GOING STRAIGHT AHEAD , USUALLY WHEN THE CAR STARTS TO MOVE AFTER BEING STOPPED LIKE AT A TRAFFIC LIGHT. I CAN GET THE CAR TO GO BACK INTO DRIVE MODE BY PHYSICALLY MOVING THE GEARSHIFT INTO SPORT MODE AND THEN BACK INTO DRIVE MODE AGAIN. UNFORTUNATELY, THE MOST RECENT EPISODE OF THIS HAPPENED WHEN I WAS PULLING INTO MY GARAGE. I WAS HALFWAY INTO THE GARAGE WHEN THE CAR SWITCHED TO SPORT MODE BY ITSELF. THE CAR WAS STILL IN MOTION INSTANTLY STARTED MOVING FASTER AND IN SECONDS IT HIT THE BACK WALL OF THE GARAGE.

IT BEGAN SHORTLY AFTER I PURCHASED THE CAR IN FEB 2018 WITH THE A/C WORKING ONLY INTERMITTENTLY AND THE SETTINGS ON THE CLUSTER HAVING THE SAME PROBLEM, AND THIS ELECTRICAL PROBLEM ESCALATED INTO A SAFETY ISSUE WHEN ON DEC 6 THE RKE FAILED (BATTERY ON FOB STRONG) AND A RE-START ON CAR DID NOT WORK, UNTIL THE SPARE KEY WAS TRIED. SINCE DEALER FOUND NO PROBLEM WITH EITHER KEY, THE SAFETY ISSUE REMAINS A MAJOR CONCERN FOR THE SENIOR CITIZEN OWNER WHO MIGHT GET CAUGHT AGAIN WITHOUT ACCESS TO THE CAR AND WITH A NON-FUNCTIONING ENGINE. THE ELECTRICAL PROBLEM SHOWS ITSELF INTERMITTENTLY IN UNPROVOKED BEEPS OF THE PASSENGER DOOR, AS WELL AS IN THE CLUSTER SETTINGS. *JS

MANY ISSUES: 1. GETS STUCK IN PARK. 2. BACK UP CAMERA FUZZY EVEN AFTER CLEANED. 3. APPLE CAR PLAY DROPS OUT. AND OR SWITCHES FROM TO CURRENT PHONE CALL. 4. TIRE PRESSURE SYSTEM IS MESSED UP. THE TIRES SYSTEM DOESN'T TELL YOU WHEN THE TIRES ARE BELOW 30LBS. THESE ARE JUST A FEW ISSUES.

CLICKING NOISE COMING FROM THE BOTTOM OF THE ENGINE EVERY TIME THE BRAKE PEDAL IS DEPRESSED. SOMETIMES THE CLICKING NOISE WILL CONTINUE AFTER THE CAR HAS BEEN PARKED AND LOCKED. THE FIRST TIME THE CLICKING STARTED, I PARKED MY CAR AND A WARNING "CHECK BRAKE SYSTEM" APPEARED BRIEFLY IN MY DASHBOARD DISPLAY BUT THE CLICKING PERSISTED. THE PEDAL FELT SLUGGISH WITH NOT MUCH RESISTANCE.

WHILE DRIVING THIS MORNING (SMART CRUISE CONTROL DISABLED BY THE WEATHER), I SET THE CRUISE CONTROL AND EVERYTHING WAS WORKING OK. I CANCELLED DUE TO TRAFFIC AND REENGAGED WITHOUT ISSUE. WHEN I REQUESTED ADDITIONAL SPEED WITH THE INCREASE CONTROL, THE CAR ACCELERATED AND CONTINUED TO ACCELERATE AND DID NOT STOP ACCELERATING UNTIL I HIT THE BRAKES AND CANCELLED THE CRUISE CONTROL. THIS IS VERY UNSAFE. I EXPECT THIS FIXED AND WILL CONTACT THE NHTSA AND ALSO FILE A COMPLAINT WITH THEM. THIS IS DANGEROUS AND IT IS ONLY DUE TO MY ABILITY TO QUICKLY REACT DID I AVERT AN ACCIDENT IN SNOWY CONDITIONS! ***** I AM CHECKING THE NO CRASH BUTTON ONLY BECAUSE MY QUICK ACTION AND RESPONSE AVERTED AN ACCIDENT, BUT THIS IS VERY DANGEROUS! *****

I AM VERY CONCERNED ABOUT THE CRUISE CONTROL. WHILE DRIVING THIS MORNING (SMART CRUISE CONTROL DISABLED BY THE WEATHER), I SET THE CRUISE CONTROL AND EVERYTHING WAS WORKING OK. I CANCELLED DUE TO TRAFFIC AND REENGAGED WITHOUT ISSUE. WHEN I REQUESTED ADDITIONAL SPEED WITH THE INCREASE CONTROL, THE CAR ACCELERATED AND CONTINUED TO ACCELERATE AND DID NOT STOP ACCELERATING UNTIL I HIT THE BRAKES AND CANCELLED THE CRUISE CONTROL. THIS IS VERY UNSAFE. I EXPECT THIS FIXED AND WILL CONTACT THE NHTSA AND ALSO FILE A COMPLAINT WITH THEM. THIS IS DANGEROUS AND IT IS ONLY DUE TO MY ABILITY TO QUICKLY REACT DID I AVERT AN ACCIDENT IN SNOWY CONDITIONS! -SCOTT