2024 Toyota Tundra vehicle speed control problems

“While driving on highway i lost power creating a dangerous situation 4 different lights came on including engine light traction control and warning about emergency brake”

“[XXX], [XXX] PM. 2024 Toyota Tundra Hybrid (i-FORCE MAX, V35A engine), 36k miles, original owner. Clear, dry pavement, evening daylight. Exiting [XXX] westbound at [XXX] , I merged into the far right lane at the second light for a right turn. A vehicle was stopped ahead at the light. Traveling 15-20 mph, I applied the brake for controlled deceleration. Right foot squarely on brake, not touching accelerator. Vehicle did not decelerate as expected. For 3-4 seconds the brake felt unresponsive — pedal felt soft and loose, lacking normal firmness. I pressed the brake fully to the floor. A dashboard warning appeared: “gas and brake pedals are being pressed simultaneously.” I was not, and had not been, touching the accelerator. I then heard engine RPM increase audibly, consistent with an acceleration command, while my foot remained fully on the brake. I felt forward thrust working against my braking. The warning cleared and brakes engaged. Vehicle stopped approximately half a car length from the vehicle ahead, narrowly avoiding rear-end collision. Automatic Emergency Braking did NOT engage despite conditions clearly meeting its criteria — stationary vehicle directly…”

“THROTTLE BODY WAS REPLACED, NO DEALER ADVICE TO REPLACE DRIVING DOWN THE ROAD ALL OF A SUDDEN MY VEHICLE WENT FROM HIGHWAY SPEEDS TO LIMP MODE ON THE MIDDLE OF THE HIGHWAY AND A WHOLE BUNCH OF WARNINGS CAME ON SECONDARY BRAKE SYSTEM FAILURE, HYBRID CONTROL FAILURE , STOPED ON THE SIDE OF ROAD TRUCK STALLED THEN RESTARTED NORMAL THEN ALL WARNINGS CAME BACK AND BACK TO LIMP MODE, PROBLEM COMFIRMED BY DEALER IN EL PASO ALMOST 300 MILES AWAY FROM HOME, NOT SURE WHO THE DEALER SHOWED TO , AND NO PRIOR WARNINGS AT ALL BEFORE THIS HAPPEND AT 51K MILES ON MY 2024 TOYOTA TUNDRA.”

“approaching a round about at a slow rate of speed, prior to entering I noticed there was time to safely enter the round about ahead of a car also entering the roundabout from another direction. I pushed the accelerator pedal to about 30% at the time I choose to enter the traffic circle and attempted to enter. The truck did nothing in response except keep rolling forward due to the momentum I already had while approaching the round about / traffic circle. After about 2 seconds, I pressed the pedal to about 70%. This still did nothing for about another 1 second, before the truck accelerated as if I had pressed the pedal to 70% from a stop. fast acceleration into the round about which caused a narrow miss between me and the original car mentioned that was also entering the traffic circle.”

“Very commonly when the truck is “cold” after sitting overnight, the truck fails to accelerate from a stop while pushing the accelerator pedal down gradually (such as when leaving a stop sign at an intersection. This lack of acceleration makes me feel a loss of control as I cannot get the truck to accelerate. For example, driving out of my neighborhood into oncoming road traffic I feel as if the truck doesn’t sense my pedal input. The truck just “floats” for at least a few seconds before the pedal reaches a point where the truck recognizes the input and activates acceleration. I can see this situation causing a safety hazard such as when trying to gain speed from a stop. The dealerships says it’s a non-issue and normal for a turbo-charged engine. I have owned cars with turbo-charged engines and have never experienced this bad of lag before. I don’t feel this is normal. My truck currently has no engine issues and is maintained routinely.”

“I am an automotive engineer. I have been involved with vehicle development programs in the disabled vehicle conversion community for over two decades and have numerous patents in that space. I have been involved with vehicle testing and calibration as well. My vehicle demonstrates a SIGNIFICANT HESITATION when the accelerator is pressed that is not consistent. I live in a roundabout dense location where timing an entry into a roundabout is easy using a normal vehicle. The 1 to 2 second hesitation where there is throttle input and no action at all from the vehicle (engine does not rev, no motive power observed) is very dangerous. I took this up with Toyota and my vehicle was checked out and "learning transmission" memory was wiped clean with me being the only driver was the remedy. The issue got better for a short time but is back and this morning I pulled out thinking there was plenty of time in front of a bus a good distance away and the lack of motive power for a full second or two resulted in a near miss. This vehicle has about 20,000 miles and was purchased by me new. There are NO WARNING LAMPS, and no DTCs thrown when this happens. I have seen several…”