Sponsored

Spontaneous acceleration in my Taycan 2022 (following software update)

Mila_kirs

New Member
First Name
Mila
Joined
Oct 26, 2022
Threads
1
Messages
4
Reaction score
0
Location
Los Angeles
Vehicles
Taycan 2022
Country flag
I felt a spontaneous acceleration driving my Taycan 2022, it happened after the update. Has anyone experienced this? The car unexpectedly without me pushing gas pedal accelerated and I was bearly able to push breaks driving in traffic.
Sponsored

 
  • Wow
Reactions: B61

whan

Well-Known Member
First Name
Will
Joined
Nov 5, 2021
Threads
14
Messages
581
Reaction score
509
Location
Marin Co, CA
Vehicles
Taycan RWD, Ferrari 458, Lexus GX460
Country flag
It’s almost 100% some form of operator error. They did a study on the supposed Toyota unintended acceleration and it was split into either people getting floor mats jammed on top of the accelerator pedal, or just people confusing the pedals
 

Archimedes

Well-Known Member
Joined
Jan 22, 2022
Threads
12
Messages
1,966
Reaction score
2,533
Location
Monterey
Vehicles
2022 Taycan 4S
Country flag
We’re you pressing down on the brake pedal when you got this spontaneous acceleration?

Alternatively, we’re you using ACC?
 


Satiger

Well-Known Member
Joined
Aug 28, 2022
Threads
8
Messages
54
Reaction score
58
Location
New Jersey
Vehicles
Taycan
Country flag
I felt a spontaneous acceleration driving my Taycan 2022, it happened after the update. Has anyone experienced this? The car unexpectedly without me pushing gas pedal accelerated and I was bearly able to push breaks driving in traffic.
Was it on hold and somehow that got released ?
 

Chris8536

Well-Known Member
First Name
Chris
Joined
Apr 10, 2021
Threads
12
Messages
324
Reaction score
262
Location
San Francisco
Vehicles
Taycan 4S (Sold) X7 M50i (sold) cayenne GTS coupe
Country flag
I’m guessing acc which can suddenly accelerate when you aren’t expecting if set too high.
 


TXAG

Well-Known Member
First Name
Dan
Joined
Mar 9, 2022
Threads
20
Messages
533
Reaction score
526
Location
Goodyear, Arizona USA
Vehicles
2022 Taycan RWD
Country flag
I felt a spontaneous acceleration driving my Taycan 2022, it happened after the update. Has anyone experienced this? The car unexpectedly without me pushing gas pedal accelerated and I was bearly able to push breaks driving in traffic.
Howdy and welcome to the forum, OP! I see you're getting a robust initiation from fellow denizens. Don't worry - we all mean well although some are more smart alecky than others :rock:

This issue could be disastrous, so we'd better get you an answer. We need a little more clarity though. Did the acceleration happen when your foot was on the brake pedal, when your foot was off the brake pedal but you were using brake HOLD, when you were coasting, or when you were using adaptive cruise control (ACC)? Like @Chris8536 , I'm thinking ACC is the culprit. If my ACC slows the car down for a vehicle in front of me and that vehicle changes lanes, the ACC will initate acceleration without my stomping on the gas pedal accelerator.
 

whitex

Well-Known Member
Joined
Jul 30, 2021
Threads
87
Messages
8,193
Reaction score
7,236
Location
WA, USA
Vehicles
2023 Taycan TCT, 2024 Q8 eTron P+
Country flag
It’s almost 100% some form of operator error. They did a study on the supposed Toyota unintended acceleration and it was split into either people getting floor mats jammed on top of the accelerator pedal, or just people confusing the pedals
While you are absolutely correct that the vast majority of reported unintended accelerations are user error, you picked a really bad manufacturer to use as an example. Toyota is the only manufacturer I have ever heard of which actually had genuine unintended acceleration proven in court due to horribly designed software and major safety process oversights.
https://abcnews.go.com/Blotter/toyo...dly-unintended-acceleration/story?id=22972214
As a side note, Toyota software engineers today are most safety process driven engineers I've ever worked with (all my experiences with them were after 2014).

To be clear, all other incidents of all other brands I've ever read about (including plenty of Teslas), have always turned out user error where the user pressed the wring pedal. With newer tech cars like Tesla, they have logs clearly showing which pedal was activated, but not just Tesla, I know my 2006 Lexus had similar logs available to the techs at the dealer because one of them showed me - in that particular case the customer brought in a Lexus claiming it stalls, but they pulled out a log showing both accelerator and brake were mashed together in the middle of a highway, meaning customer wanted hit the accelerator to pass, but fat-footed both pedals, and car computer prioritized brake over gas, so customer thought the car stalled.

EDIT: Additional link with results from the Toyota software/firmware investigation from back then:
https://www.edn.com/toyotas-killer-firmware-bad-design-and-its-consequences/
 
Last edited:

backslashed

Well-Known Member
First Name
Gabriel
Joined
Feb 21, 2022
Threads
23
Messages
228
Reaction score
176
Location
Romania
Vehicles
Taycan 4S Cross Turismo
Country flag
I sure hope spontaneous acceleration is not the reason for the lack of answer from the OP.
 
  • Like
Reactions: B61

Satiger

Well-Known Member
Joined
Aug 28, 2022
Threads
8
Messages
54
Reaction score
58
Location
New Jersey
Vehicles
Taycan
Country flag
While you are absolutely correct that the vast majority of reported unintended accelerations are user error, you picked a really bad manufacturer to use as an example. Toyota is the only manufacturer I have ever heard of which actually had genuine unintended acceleration proven in court due to horribly designed software and major safety process oversights.
https://abcnews.go.com/Blotter/toyo...dly-unintended-acceleration/story?id=22972214
As a side note, Toyota software engineers are most safety process driven engineers I've ever worked with (all my experiences with them were after 2014).

To be clear, all other incidents of all other brands I've ever read about (including plenty of Teslas), have always turned out user error where the user pressed the wring pedal. With newer tech cars like Tesla, they have logs clearly showing which pedal was activated, but not just Tesla, I know my 2006 Lexus had similar logs available to the techs at the dealer because one of them showed me - in that particular case the customer brought in a Lexus claiming it stalls, but they pulled out a log showing both accelerator and brake were mashed together in the middle of a highway, meaning customer wanted hit the accelerator to pass, but fat-footed both pedals, and car computer prioritized brake over gas, so customer thought the car stalled.
Don't want to derail the original topic but like to point out few discrepancies.

Toyota's unintended acceleration on certain models were linked to low clearance on gas pedal manufacturing. Rest all reported incidents were related to user error.

And even the article that was shared, it points to 'sticky' gas pedal than the software . If we recall, initially Toyota was battling the misinformation of the cause as electro-magnetic interference with software. Then it got shifted to just software! .

It was then Toyota had to import a certain scanner from Japan and to trained 9 (nine) in US to read logs, performance parameters from the engine to identify if those indeed were interference / software related or not.

This is when I became wary of qualified resources who can handle foreign made modern cars in US .

Now onto sticky pedal, not all Lexus models and not all vehicles within those models were affected by this . It was finally linked to a supplier and to one particular plant which used those parts. And that wasn't in Japan.

I have driven only Lexus cars for past 24 years . Since 2005, have had 3 different models at any in point. All Lexus I owned were manufactured in Japan and knowing affected plant/supplier info, not a single moment feared driving those.

That all being said, the way Toyota handled the saga is not acceptable. They should've replaced the supplier or at least stopped the assembly until suitable one is found . Corporate greed and mass production expansion over powered their core DNA, quality !
 

DerekS

Well-Known Member
First Name
Derek
Joined
May 25, 2021
Threads
119
Messages
3,213
Reaction score
5,530
Location
Los Gatos, CA
Vehicles
2025 Taycan GTS
Country flag

Satiger

Well-Known Member
Joined
Aug 28, 2022
Threads
8
Messages
54
Reaction score
58
Location
New Jersey
Vehicles
Taycan
Country flag
But the brake pedal halts ACC immediately, right?

OP said the "breaks" "bearly" stopped it.
Technically should, that too when manual braking was engaged.

Multiple reads of OPs post, may be OP was on ACC and was resting the foot on the pedal (I found no separate foot resting in Taycan's is a inconvenience especially during long driving with ACC) which accidentally got pressed ?

Which could give little time to stop the car , giving the impression barely able to stop ?

Unless OP gives more info, it's hard to know exactly what happened .

But OP gives hope for some lawyers ?!
Sponsored

 
 








Top