Power Train Problems of Tesla Model Y - part 2

The car started to malfunction its ability for regenerative braking (regen. ) upon release of the accelerator. The car felt as if the regen feature was slipping - so instead of a constant brake and deceleration, the car could be felt moving forward as if accelerating. Then while driving on freeway at 65-70 mph, car lost its ability to brake when I pressed on the brake twice, instead of slowing it felt as if the car just continued at its current speed. Then the car cut its power and flashed an alert "power reduced - exiting and re-entering vehicle may restore operation" it then flashed an alert "pull over immediately - unable to drive". According to Tesla, they said it was the "lh body harness. Found that the harness was not creating an efficient connection" but they never directly addressed why it felt as if the car was accelerating when I pressed on the brake. Safety was critically comprised for myself and others who I could have hit in a vehicle collision since the brakes did not respond accordingly and felt as if it accelerated or continue to maintain its speed. The problem was confirmed by Tesla but they only addressed the car going into what they refer to as "limp mode". Car was inspected by Tesla and diagnosed the problem to a faulty/bad body harness that caused an improper signal. No warning lights or messages prior to the failure. Symptoms started the morning of the incident with the noted regen not fully engaged/working correctly. I did not have any feature setting which would have caused or replicated the lack of regen. I can provide the dealer invoice if needed.

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Auto acceleration(forward) caused while parking and crashed into fence and utilities. Requested Tesla to diagonalize the cause of auto acceleration. Tesla couldn't handle my request well and they canceled and delayed my request, finally, they rejected my request as the car was salvaged.

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My wife was driving in moderate rain on the freeway. We were going about 70mph which was the same speed as the rest of the cars. We were going around a gentle turn in the road. Then without warning, our car started to slowly spin around. My wife instantly and completely lost control. We spun almost 180 degrees, crashed into two other vehicles, and came to rest against the cement barrier. Luckily nobody was seriously hurt, but we totaled two vehicles and damaged another. If the spin had happened along a different section of road we frequently drive on, we would have slid into oncoming traffic and people could have been killed. I requested that Tesla send the full data logs of the accident. It shows that my wife released the accelerator pedal right when the spin started. In most cars, releasing the accelerator causes the car to gently slow down. But Teslas, on the other hand, do aggressive regenerative braking when the accelerator is released. So it was as if my wife had pressed the break. Here is the problem: the regenerative braking system applies the breaks to the rear wheels only. On dry pavement this is fine, but on a wet road, going around a turn, hitting only the rear breaks was enough to cause the back of our car to slide out from behind us. Here is more detail: 1. Our car was all wheel drive. But the Tesla has published that for increased efficiency, they don't actually use the front motor except during high acceleration. This means that most of the time the car is only rear wheel drive. 2. Our car had under 25,000 miles on it, and the factory tires. The rear tires were worn more than the front tires, likely due to the car's acceleration being mostly applied to the rear tires. I believe that Tesla could fix this issue with an over-the-air recall. The recall would need to either reduce regenerative braking when wet roads are detected, or apply braking across both the front and rear wheels while on wet roads. Thank you!.

This is the second instance of this issue happening, first at 1800 miles odo, and second at 4690. Both instances, when driving, the vehicle suddenly and violently shuddered to a stop. The first instance happened as I pulled out from a stop sign to take an unprotected left onto a street. In the middle of the intersection, the car shuddered to a stop violently and a lot of warnings and alerts came up on screen. Cars moving both directions had to suddenly stop to not hit my car dead in the intersection. The gear stalk inputs to put the car in drive or reverse and allow function of the vehicle did not work. I pushed the park button on the right stalk and then moved it into drive, which it allowed. I was then able to limp the car out of the intersection (with power vastly reduced and speed reduced) and await a tow. The second instance I had pulled into a parking lot at around the same speed (~15 mph) in which the car again shuddered violently to a stop with no ability to override. Traffic behind me had to brake as to not hit my vehicle which stopped in the middle of the lot. Again the car was inoperable until this time locking and unlocking the car from outside of it and reentering to limp it to a parking spot for tow. Safety of myself and others were put severely at risk suddenly and without warning from the car stopping itself. If this were to happen in other, less fortunate scenarios, risk to human lives is great. Problem has been confirmed by Tesla service center, but not reproduced while in their possession. The vehicle was inspected by Tesla service after the first incident and was explained to have found no faults with any hardware, but found a corrupt line of code in the firmware (no update or firmware change was noted to be available). Warning messages and alerts populated at time of incident and no sooner (no warning is given prior to issue). Alerts include power reduced, rear motor disabled, vehicle shutting down, automatic emergency braking disabled and more.

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Bought a brand new Tesla Model Y with 11 miles on it. 1 mile down the road it tells me to “pull over immediately” “reduced power” I was going 45 mph downhill and thankfully not a lot of cars around. I pulled over and it said reduced power, exit and enter vehicle to restore operation. I did and it worked fine. I drove home with no problems for 25 miles. An hour later I was headed somewhere else and stopped at a light, when it was green I accelerated then it did the same thing but I was on an entrance ramp to a bridge and 5 cars were behind me. The car then was in reduced power mode and told me to do the same thing again, exit then re-enter. It was busy traffic and took me 5 minutes to get out when there were no cars going past me. It reduced power and couldn’t excelerate and caused a dangerous situation. This happened 3 more times while I was on the phone with Tesla support before I had to wait 2. 5 hours for a tow with 47 miles on it.

Vehicle displayed alert “powertrain requires service - vehicle speed and power may be limited” at 1664 odometer miles. Vehicle had to be towed to the service center and the cause was a faulty oil pump.

Driving 70mph on the highway, car abruptly clunked and three warning messages appeared. App_w009 automatic emergency braking is disabled; dif_a062 power reduced; and bms_a170 acceleration and top speed recuded. Car immediately dropped to 40mph and gave me enough time to exit the freeway to the shoulder. After putting in park, the car would no longer shift into any gear. Soft reset and full reset, exiting and re-entering the car didn't fix the issue. Tow required. Failure of rear motor (inverter) was cited in the service center. Seems to be a common issue across model 3 (as far back as 2017), Model Y (deliveries in Nov/Dec 2022) and model s (the last 3-4 years). Very dangerous if someone had hit us when it decelerated hard on the highway. Traveling with a 6yr old in a car seat. Only 500 miles on the car.

I bought this Tesla Model Y in less than a month to be specific February 23th, I was forced to park the car due to rear motor failure. I had barely any time to find a parking lot before the car shot down on me. Until today, I have not gotten the car yet from Tesla due to long delay repair time.

Vehicle has less than 5,000 miles. On three separate dates, a sudden warning appears "rear motor disabled; avoid steep hills; if problem persists contact service. There is an image of a turtle icon, and vehicle speed is limited. This happens with a gradual reduction, first to around 65, in a few minutes it drops to 37 mph. I had to drive several miles on a limited access turnpike with no exits at 37 mph, including crossing some bridges with no shoulder lane. I was very concerned about being rear ended in this situation. Information below is on the most recent incident which happened today.

The vehicle started shaking and stuff wrong from the rear wheels and was told to pull over safely. The error codes dl_a063 and dl_a139 popped up and it seems there is a rear drive unit failure.

I purchased the car and took delivery on 12/29/2022 where immediately I noticed while driving the car home that there was a high pitch creaking sound from what I think is the front drive unit of the car. I have brought back the car to the service dealer over 8 times to rectify the concern of the noise. There were many service technicians that heard the sound while I test drove before the car went into service and they all acknowledged the sound and said it was not normal. However, the service techs had picked and choose which item they thought on the car that created this sound and this is documented on the service receipts/invoices. They kept taking my car apart and replacing parts on the car and when I would pick up my car the sound was still present int he car. Now I have had the car for 11 months and now the sound is still present and Tesla has no fix for this. The last service I brought the car in for for this high pitch sound and they replaced the front drive unit and still the noise is present.

The contact owns a 2021 Tesla Model Y. The contact stated while at a complete stop with the brake pedal depressed, the vehicle rolled backwards. There was no warning light illuminated. The contact stated that the failure had been reoccurring intermittently while at a complete stop. The vehicle was not diagnosed or repaired. The manufacturer was not notified of the failure. The failure mileage was unknown.

Steering wheel locked up and would not let driver navigate off-ramp from freeway. Car attempted to force driver to merge into a stopped lane. Auto-pilot features engaged in screen but they were not manually activated. Car attempted to cause an accident.

Touchscreen repeatedly freezes. Won’t show gear selection, speed, or any other items. The touchscreen freezes then takes some time to crash to black screen before reboot. Has happened daily since Tesla update. Tesla refuses to provide a fix and continues to tell us to wait for an update. This is unsafe.

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There is no sound warning to switch gears. For example from forward to reverse. I was trying to go forward and I was actually in reverse. The gear change is on the steering stalk and doesn’t make any warning sound when switching. As the drivers eyes are looking forward, and not looking at the screen feedback, it makes it difficult to remember which gear you are in. Forward or reverse. I assumed I was going to move forward, but the car was actually in reverse. I hit the car that was parked behind me and did damage to my car. I’m feel that most cars makes a physical click sound with the gears shifting as well as a small jump in movement to remind the driver they have switched directions.

Without any warning, the display on my car froze up when my car came to a stop, and I could not accelerate. It seemed to say I was going 15 mph, when in fact I was stopped, and the display was completely unresponsive. Stepping on the accelerator did nothing. I could not use my turn signals, activate my 4-way flashers. No one was injured, since this happened on a quiet residential street, and I was able to wave to other motorists to go around me. After about 3 minutes, my car seemed to have reset, and I was able to drive it normally. I would gladly make my vehicle available for inspection upon request.

Received error code: vcfront_447 indicating a cabin heat issue, and a complete loss of heat within the interior of the vehicle. It appears this also is preventing the battery from fully warming up causing severe vehicle power reduction and lack of regen braking. It being sub-zero and frost bite within minutes this poses a safety risk when traveling. The problem has been reported by other vehicle owners. It has not been inspected at this time. There were no other alerts prior to the issue starting on 1/20/2022 at ~6am cst.

On January 19th, around 9:35-9:40am, while driving on bollinger canyon road in san ramon, the car jerked as if someone rear-ended it and then stopped abruptly in the middle of a busy road. The information screen displayed various error messages regarding battery and drive system. The stop was abrupt and we could have been seriously injured in busy traffic. This was a scary experience. The car had 260 miles range in the battery and no prior warnings/ messages indicating any problem. We called 911 and Tesla roadside assistance for help. San ramon pd showed up and blocked the lane to avoid someone hitting our car. They had the car towed to the nearest Tesla service center in dublin, CA. While waiting for the tow truck, we attempted to restart the car and computer system two times but the car did not go into "drive" position to be moved. The service center is diagnosing the problem and have informed us that it could be a problem with the motor or drive terrain or inverter of the car. All these are major and crucial components on the car for safe and normal operation. Failure of any of these is catastrophic and can be fatal on freeway speeds or local roads if someone is following too closely and the car stops abruptly. We usually have kids in the car and this is a scary situation to imagine. This needs to be investigated in more detail by someone to find out how many card suffer this fate and how many accidents/ fatalities have been caused by something like this.

The vehicle loose power all of sudden while driving disabling all power including loss of power steering, failure of lane departure avoidance, regenerative brakes, parking breaks, traction and stability controls. This has caused hazardous dangerous conditions on the road. The vehicle had to be towed to local Tesla repair/service center on 4 occasions. We have been given false reassurance with no definitive fix yet, continues to be an ongoing issues that recurs after few weeks that vehicle comes back from service center.

Sudden, hard self breaking when in autopilot mode. Danger of collision at high speeds.

The car has less than 300 miles on it and I hear a loud clunk under the front of the floor by the pedals as if something is loose like the front motor or the suspension.

This problem happens repeatedly. It has been reported by multiple Tesla owners but no action has been taken by Tesla. When driving with the cruise control engaged, the car will brake very aggressively. This happens most commonly when there is no other traffic on the road and no debris on the road. It seems the car believes there is something in front of the car for which it needs to stop, even though the road is clear. But if I press on the accelerator the car resumes normal cruise operation. If there is a car behind me I am worried that the car behind me will crash into me. The braking action is very aggressive.

Backing out of garage, the driver began to smell acid and burnt electronics from the back of car. After driving back home from work the driver inspected the car. The back driver side door reeked of burnt electronics and the entire car had an acid smell. After consulting Tesla, the first Tesla maintenance worker noticed the entire inside of the door had melted and all electronics were fried. He claimed he had never seen this before. The second maintenance worker came with parts and determined the window module had overheated and caught fire. The fire melted many components inside the door. A brand new 2021 Tesla Model Y should not spontaneously catch fire. Especially if it is residing inside the garage of a house. After replacing all the components, Tesla deemed the car safe to drive. Yet, a couple days later they requested we bring the car in so that they could replace the computer that controls the left side of the car to do more research and find the 'root' cause of the fire. There were no warnings for the driver, nor was the driver using that window module. We have not driven the car since as we feel unsafe in the vehicle.

These are additional comments regarding complaints numbers 11406321 and 11406325. Since that time we have had increasingly frequent problems with the phone keys on multiple phones. My suspicion is that the problem I initially reported in case number 11406321 was caused by loss of communication of that phone. I have never been able to re-establish that phone as a phone key, and we are now experiencing problems with multiple phones. I most strongly believe that there is a huge safety issue with the phone keys. Failure of that bluetooth connection would result in the immediate stopping of the vehicle.

On multiple occasions we have lost communications with the vehicle through the Tesla phone app. The problem exists for three different phones of two different models. We have usually been able to re-establish communications through the Tesla procedures, but not always. On all but one of those occasions the vehicle was stationary and we were able to use a key card to continue. But on one occasion, while making a u-turn on a side street, the car just stopped moving, partially blocking the street. We had lost communications with the phone app. After recovering with a key card we went straight to the dealer. Examining the software, they claimed that I had hit the 'park' button while moving. First, I would have had no reason to do so. Second, I know of no vehicle that would not block any attempt to enter park while moving. Third, it killed all communication with the vehicle, while moving, leaving it stranded in the middle of the street.

These are additional comments regarding complain number 11406321. We did have to shift into park in order to use the key card. That is normal and expected.

These are additional comments regarding complaints numbers 11406321, 11406325, and 11406632. According to Tesla documentation, loss of phone key communication should give 2 to 3 minutes drivability to get to a safe stop. There was no statement that I found in that documentation to describe how the driver is notified of the failure. Regarding the statement by Tesla personnel that I tried to shift into park while moving, the car does, indeed, prevent that from happening, and gives the driver a loud audible warning. The date of occurrence listed with this submission is approximate.

Autopilot/cruise control disengage function should not be on activated by selecting up/reverse on the gear selector. Car inadvertently went into r reverse when disengage was commanded. Narrative: car was on interstate at highway speed with navigate on autopilot and adaptive cruise control on. An accident occurred on the expressway and the state police began to shut down the road. The car successfully and safely automatically stopped behind traffic in front. Police began directing stopped traffic to move off roadway. I selected "up" or disengage on the gear selector and the car instead went into reverse. I stepped on accelerator and car moved backwards without warning. Disengage autopilot/adas needs to be a separate function and different control motion from selecting r reverse like on model 3. Very dangerous.

This is the 2nd Tesla my mom owned, she drove a model 3 without any problems for many months. She picks up this Model Y on November 19 2020, and drives home from the dealer without issues. Next day November 20, 2020, drives to her work, pulls into a parking spot and came to a complete stop. Approx 5-10 seconds later the car lurches forward, hops over the parking curb, over some grass and into a brick wall at full acceleration. Luckily nobody was hurt, but severe damage to the building and the car. This case of unintended acceleration needs investigation. My mom does not feel safe getting back into this Model Y.