Home Tech Car Tech 101: Auto-start-stop explained (On Cars)

Car Tech 101: Auto-start-stop explained (On Cars)

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Watch more from Roadshow by CNET – http://bit.ly/1T6mpHF
Brian Cooley discusses auto-start-stop tech, what it is and why it’s here to stay.

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42 comments

@Lobsterman5481 February 24, 2025 - 3:43 am

As long they give the option to shut it off.

@Th33Vultur3 February 24, 2025 - 3:43 am

You can buy something like the auto start stop eliminator, remember to press it before you go on driving as soon as you get into the car to disable it for the car ride or As soon as it turns off, let go of the brake pedal immediately, and it should disable it, especially when waiting at a light or a stop sign

@RyanFodrea February 24, 2025 - 3:43 am

So people bash on these because using a traditional starter system puts wear on the starter and said starters are kinda inefficient. Newer systems however negate this. They for instance have some with more durable starters that don't wear easily. However they're still kinda inefficient to start. On hybrids, the electric motor spins up the engine unless it's too cold to do so or the hybrid battery is too weak in which case it uses the normal starter as a type of auxiliary backup. These also reduce starter wear and are a bit more efficient to start. But by far the simplest design I've heard is on fully ICE cars that simply remember which cylinder is next in line to fire and when it's time to restart, it just injects some fuel and sparks that spark plug to get it going again. It only works for the auto start/stop feature because the ECU must be on to have the data to fire the proper cylinder. Actual startup would still be by a traditional starter.

@berthabbdiva9162 February 24, 2025 - 3:43 am

Will it affect the car driving like will it affect the battery to die … I have a 2018 jeep compass I have my off but that annoying A with a circle ⭕️ is on can I just turn it off … it’s $82 dollars to get a diagnosis Will I ruin my car driving it with that alert ‼️

@sms9106 February 24, 2025 - 3:43 am

Do not want

@billquattlebaum1577 February 24, 2025 - 3:43 am

It's 2024 now and I don't like it on my Ford Maverick truck. I turn it off most of the time. I live in a rural area without many lights and stop signs. It is a hassle to me and not worth it. You should be able to turn it off permanently, but you have to turn it off every time you start the vehicle.

@JHKCF February 24, 2025 - 3:43 am

By not using it, it will pay for itself by not having to prematurely replace the starter or any other component wearing out faster due to continuously repeated use.

@JR-pr8jb February 24, 2025 - 3:43 am

First time I heard of this, it seemed like a weird modern annoyance. But I'm now buying a new Toyota, so who knows. Will give it a try.

@Th33Vultur3 February 24, 2025 - 3:43 am

Another thing also is short trips and a battery that’s not fully charged will defeat the auto start stop. Because I had mine not work for at least two weeks before all of a sudden I took a longer trip since all I go is to work and back and it decided to work again when I came to a stop at the light or my turn to cross at a stop sign.

@west_park7993 February 24, 2025 - 3:43 am

in ideal conditions, i.e. no ac, no rain, no headlights, engine stops and waits for a minute or so on each red light. however, if you run ac, and who does not, the stop is only 5-7 seconds. i.e. no fuel economy. the whole thing seems to me a sweet deal between epa and car makers. they all pretend to do smtg good for the environment. batteries, starters, oil starvation, you all know the problems.

@jakegreen6341 February 24, 2025 - 3:43 am

Why do Americans hate this helpful feature?

@davidward9282 February 24, 2025 - 3:43 am

Great way to sell starters

@ravenryan February 24, 2025 - 3:43 am

What could go wrong? SMH.

@keepgrindingup7661 February 24, 2025 - 3:43 am

The joke that they use a heavy-duty starter and a deeper cycle battery are complete horse hockey… it's also the rest of the engine that suffers from this starting and stopping the fuel savings are miniscule compared to the repairs that will be needed on these engines

@vintagehaynesflute February 24, 2025 - 3:43 am

I have it (" Enhanced restart in stop and go traffic") on my new Mercedes E class. It shuts down silently, so far so good. But when I lift my foot from the brake it feels like crack smoking zombies are attacking my engine. I use it to save gas but I hate the way it works.

If it’s enhanced what was the original like??????

@jimm2434 February 24, 2025 - 3:43 am

I was never made aware of this feature before in any of my vehicles. I have always kept up with all the latest technology. I never noticed any difference or problems with any of my previous cars nor my current one. It’s a 2018. It’s a Turbo 2.0 AWD Lincoln MKZ Reserve. The power that I have in the car pins me in my seat. I was in the wrong lane on a road that was new to me. I had to crossover to get to my exit as fast as possible. As soon as the light turned green I punched it. I crossed 4 lanes & made my exit. I was stunned. I couldn’t see any other exits but the one I had taken. I didn’t want to be lost on Country Roads. Later, I discovered it would have taken me an hour & a half before I could have taken the next exit. My previous Lincoln was a 2011 Lincoln V6. I had no idea a 2.0 would ever have that much power at takeoff. I had 2.0 turbo 4’s before. Nothing like this one. If it has the start/stop feature I’m not aware of it. My car is loaded with Safety Features/Equipment. If I thought that I wouldn’t have made the crossover I would’ve done it. My car would’ve alerted me. It also stops me if traffic stops suddenly. When I’m buying a vehicle I’m overwhelmed by all of the numerous safety features & what’s under the hood. I have paddle shifters. I can change my settings from comfort, sport & I forget the 3rd setting is. I will be sure to check out the Start/Stop feature now. I started working at an Auto Parts Warehouse. 2 to be exact. I love to be educated every chance I get. I wish more experts would discuss Hydroplaning. Thanks you.

@Florentina-ox9xq February 24, 2025 - 3:43 am

And what you say about novice drivers that panic and try to see what they did wrong when they notice the engine stopped at the red light even through they did nothing wrong?

@mlangfordoutdoor February 24, 2025 - 3:43 am

I have a hard time watching with the flashing between segments with my eye condition but an over all great info

@cmiller1654 February 24, 2025 - 3:43 am

It is a bulshit. I hate it.

@carrow2250 February 24, 2025 - 3:43 am

How do you shut it off entirely? I know there’s devices that you can install to have it auto disable, but I’m wondering where to disable from the vehicle

@irockz281982 February 24, 2025 - 3:43 am

I turn it off every time.

@richieped8163 February 24, 2025 - 3:43 am

I got a thing on the internet that cuts that bull out.Why would you want to ware your motor out prematurely ,You don't what you are talking about!. You save gas up front but pay for a new motor later so you don't save anything,.

@anthonytriolo3643 February 24, 2025 - 3:43 am

I dont think the starter is doing-the work ,the computer remembers the last piston fired and fires the next sequence of pistons.

@akaunderdog4223 February 24, 2025 - 3:43 am

7 years later, im so grateful i found this video. Great host as well.

@cryptokoolaid February 24, 2025 - 3:43 am

I must disable this thing

@me_rap27 February 24, 2025 - 3:43 am

If it is on. Once your in full stop or idle and auto stop technology applied do you need still to shift your stick to neutral even your engine is in stop when holding the brake or leave it on Drive (D).

@subatomic10 February 24, 2025 - 3:43 am

It's January 2023 , thoughts anyone ?

@southerncross3638 February 24, 2025 - 3:43 am

More bells and whistles to go wrong.

@changenoways9555 February 24, 2025 - 3:43 am

This guys got a great sense of humour lol!!

@jamstarent21 February 24, 2025 - 3:43 am

Worst invention, how many starters will you go through

@lyndonevans513 February 24, 2025 - 3:43 am

I didn't know I had stop/start in my focus until I had to pay extra for a special stop/start battery when the old one failed. The stop/start in my car has never worked, not once in the three years ive had it, and that's ok by me as i dont think I would like the car cutting out and rolling backwards if i stopped on a hill.

@rustbeltrobclassic2512 February 24, 2025 - 3:43 am

It works great.. adds complexity, cost of maintenance, prematurely wears flywheel teeth and starters and most have secondary lead acid batteries, which are great for the environment. We also have chip shortages and having this feature helped increase new car prices by 19% yeah it's great, saves you .05% of gas over 10 years, but costs you tens of thousands of dollars.. thanks California

@domnmvlogz1 February 24, 2025 - 3:43 am

I own a 2022 Civic Si, gotta turn this feature off every time I start the damn car. Side note this feature can damage your starter in the long run…

@EARLandPEARL-c3i February 24, 2025 - 3:43 am

my 25k jetta has it

@steven-ky2ps February 24, 2025 - 3:43 am

Remember the KISS rule. Keep It Simple Stupid!

@brianlapointe2764 February 24, 2025 - 3:43 am

I am interested in the cost of installing it on an older vehicle. Idling in large city traffic jams is irritating and causes huge smog issues. You can go for miles without even starting a car if you are on a downhill section. A more expensive battery is a minor cost. What is the cost of purchasing and installation? Maybe we can avoid recycling huge numbers of dead electric cars with a small modification to our gasoline cars.

@SubieandFriends February 24, 2025 - 3:43 am

I have this feature in my car too but it’s called manual stop and start, it works by the driver manually turning the key to either off or on depending on the situation and it’s a standard feature too!……i know I know, I will walk myself out the rear door so please hold on to your tomatoes thank you very much

@mrrandysgt February 24, 2025 - 3:43 am

It's junk technology that does very little to save gas,,and much more to wear out the engine. In other words. it's no Damn good

@77raymondt February 24, 2025 - 3:43 am

Works great!!

@ddcjpv February 24, 2025 - 3:43 am

Someone else drove my jeep when I got it back noticed engine stop at the light, I said what's going on, that is why I'm here, didn't know my has this upgraded, but I'm agree with some of you, engine on an off 100 times per day sooner or later something will broke

@morsecodereviews1553 February 24, 2025 - 3:43 am

Well that was fun. Just bought my first vehicle with this dang ole "feature" and I thought I broke the damn thing before I got home. 🙃

@journeytree February 24, 2025 - 3:43 am

I don't believe the 3-10 percent savings. I drive on the highway 100 miles a day and the engine some days never turns off. When it does turn off, it's for 10 seconds waiting for a light to change. That is when my 2022 Civic actually turns off. Most the time it has some reason to not turn itself off. It's overall annoying and I hope it doesn't have a hiccup some time I'm pulling into traffic that is coming down the road. Rolling into a semi isn't the way I'd like to go out.

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