Turn Signal Problems of Tesla Model S - part 2

My Tesla mcu1 screen/memory failed and had to be replaced at my expense. $1600. When that happens, turn signals, climate control, and wipers are inoperative, making the vehicle unsafe to drive.

See all problems of the 2015 Tesla Model S 🔎.

Mcu failed. When it failed car would not shift into drive. Before failure mcu was constantly rebooting while driving. During reboot would lose headlights, turn signals, radio, and air conditioning. Complete failure occurred while stationary. Rebooting occurred while driving.

Mcu (center screen) failed in my 2013 Model S. I returned to the car after it was parked all day in an outdoor parking lot at work and it would not turn on. Rebooting, other troubleshooting did not remedy. As a result of mcu failure, turn signals did not work (exterior turn signals and audible indication of turn signals), air suspension could not be adjusted, climate control could not be adjusted, headlights could not be manually controlled, steering settings could not be adjusted, charge level could not be adjusted, media/entertainment could not be used, backup camera could not be viewed in addition to other functionality for the car. Leading up to the complete failure of the unit, the mcu would occasionally reboot itself during driving causing loss of turn signals and change in steering dynamics.

See all problems of the 2013 Tesla Model S 🔎.

The contact owns a 2016 Tesla Model S. The contact stated that while operating the vehicle, the mcu screen intermittently became inoperable. During the failure, the rear view camera and exterior turn signals were inoperable. The cause of the failure was not yet determined. A dealer was not contacted. The manufacturer was notified of the failure. The contact was informed that the vehicle was included in the NHTSA campaign number: 21v035000 (back over prevention, visibility, exterior lighting). The contact stated that the vehicle had experienced the failure listed in the recall. The approximate failure mileage was 15,000.

See all problems of the 2016 Tesla Model S 🔎.

Tesla main computer is designed to fail and disable the ability to turn on the headlights, turn signals, rear view camera, and so on. The main computer logs everything happening in the car excessively (they do this so press reviews can be refuted, it has happened many times) but that logging causes the chip to fail. The solution is to turn off logging but they refuse, so these computers fail predictably on schedule. All Teslas are affected.

Twice recently while driving on highway at night, the car computer started failing. Lights went out, turn signals didn't work, eventually the whole screen and dashboard that let you drive turned blank. I had to find a way to quickly pull to the side of the road and reset the car by pressing and holding the two buttons on steering wheel. This is a very unsafe condition.

See all problems of the 2018 Tesla Model S 🔎.

The center media touchscreen (mcu) in my vehicle stopped functioning and several functions ceased working. Initially I received a "touchscreen unresponsive" message while driving so when I stopped at a stoplight I attempted to reboot the mcu using the steering wheel controls. The screen started the reboot process but everything that was on including hvac and radio turned off for the remainder of my drive and were inoperable until after the screen was replaced. The touchscreen never turned back on. Many functions did not work when the mcu died with the oddest one of all being that I had no turn signal sounds which I think are created by the cars audio system and the mcu. With the loss of the mcu, I lost the use of my backup camera and my hvac which was stuck in an off state so I had to roll down my windows in order to have any airflow in the cabin. Thankfully I did not need the forward or rear defroster between when my screen stopped working and it was replaced as both are controlled via the mcu and were unavailable. Charging at home was extremely limited and maxed out at very low amperage and I was unable to change the charging amperage due to the inaccessible touchscreen. I did not try a DC fast charger. Mobile app control was unavailable so I was not able to use it to adjust my hvac or charging settings. The controls for adjusting the active air suspension were also not available however the car appeared to set itself to a normal ride height. No steering wheel controls (hvac, radio, sunroof, voice commands) worked and my headlights were stuck in auto mode that was the second mcu in my car, previously being replaced about 14 months earlier due to the screen adhesive failing which caused air bubbles to form within the touchscreen. I think the cause of the mcu failure was emmc flash reaching its maximum write lifetime despite the prior replacement.