Stop / Start feature rarely engages

[Rickey]

Post #4 has the list from my ‘22 owners manual… is your list from a different owners manual?

2023

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[Rickey]

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[NMhunter]

The auto stop/start feature is a battery monitor. If it isn't working, it may be time to charge your battery. If you make mostly short drives in the winter, your battery will eventually run down. It takes time to charge the battery back up after a start. Also, you drive more in the dark during the winter, so your headlights are on more, which means it takes even longer to recharge the battery.

As pointed out in the video, the system is designed to reduce emissions. I'm all for that. The video states that Toyota starters are designed to do 380,000 starts. That should last a year or two.

On my Superduty, which I park outside and rarely drive, I keep a solar panel on the dash to keep the batteries fully charged. It starts every time.

 

[davidg4781]

As pointed out in the video, the system is designed to reduce emissions. I'm all for that. The video states that Toyota starters are designed to do 380,000 starts. That should last a year or two.

How did you figure a year or two?

I did 380,000 divided by 365 days to get 1041 years at one start/day. Then I divided that by 20 starts/day and got 52 years. That's assuming driving every day and starting 20 times. I think on my way to and from work, in the city, it stops/starts maybe 8 times total.

 

[DWG]

Using Toyota's 380,000 starts and divide by the number of years that a car is kept. I am using 10 years.

380,000 divided by 10 years = 38,000 starts a year divided by 365 days = 104 starts a day. I do not think most people are driving enough each day to get to 104 starts a day so the starter should be able to last longer than 10 years without a problem related to the start/stop feature.

 

[NMhunter]

How did you figure a year or two?

What is the opposite of hyperbole? I had to google it. It is Litotes. Understatement isn't a strong enough word. Clearly, I'm not worried aobut my starter wearing out. I remember my '47 Chevy starter took about a minute to start (on a good day). This Bronco takes about a second.

 

[DWG]

My BS is 10 months old and has 3400 miles on it so far. We were on vacation for the first week of December so the car sat for a week. Prior to vacation the Auto Start Stop would engage regularly. Since returning from vacation and colder weather setting in I have made a point to drive the BS at least every couple of days for 30 to 40 miles to keep the battery charged. Since vacation the Auto Start Stop never engaged. I had the BS at the Dealer today and asked them to check the battery since Auto Start Stop stopped working. I have an Just came back from Dealer. One of my issues was the Auto Start Stop has not come on since the beginning of December even though I have been driving it. The car BS was delivered with the EFB battery. The Dealer checked the battery and the SOC was at 67 percent. They replaced the battery with an AGM battery and the Auto Start Stop was working almost immediately after leaving the Dealer.

I do look at the Auto Start Stop as an indicator that something might be off with the battery but since having recall 24S24 completed a few months ago I wasn't sure if that was still the case in the winter months or if the Auto Start Stop not engaging in colder weather was now normal. But apparently in this case it was the battery. The outside temperature was 28 degrees.

 

[Dude]

Could be normal - due to the cold weather

see posts #4, #40 or your owners manual for a list of reasons why auto stop start does not engage

 

[DWG]

Could be normal - due to the cold weather

see posts #4, #40 or your owners manual for a list of reasons why auto stop start does not engage

I thought it could be normal too especially after the software update but raised the issue to the Dealer to at least check the battery health and the Auto Stop Start is working again at 28 degrees so happy to get the AGM battery.

 

[Bucko]

How did you figure a year or two?

I did 380,000 divided by 365 days to get 1041 years at one start/day. Then I divided that by 20 starts/day and got 52 years. That's assuming driving every day and starting 20 times. I think on my way to and from work, in the city, it stops/starts maybe 8 times total.

You did much, much better in math in school then that other poster!

 

[Leeford]

I have a EFB and it's coming up to three years old (original was replaced by Ford when with only 8 months on it). When I see, "Engine on due to vehicle charging" I usually place the battery on a tender which tends to do the trick on solving the issue. Well this past week the message presented itself and I did my usual thing. Regardless how long I left the tender on, I could not get rid of the message. My voltage is great so I was confused on the matter. I took the vehicle to Ford and the end result was, I need a replacement battery. The SOH was at 67%. Ford is selling me the AGM with only a two year warranty. Getting a replacement from Canadian Tire with a five year warranty instead due to the failure rates of batteries these days. PS the dollar cost is the same.

 

[DWG]

I have a EFB and it's coming up to three years old (original was replaced by Ford when with only 8 months on it). When I see, "Engine on due to vehicle charging" I usually place the battery on a tender which tends to do the trick on solving the issue. Well this past week the message presented itself and I did my usual thing. Regardless how long I left the tender on, I could not get rid of the message. My voltage is great so I was confused on the matter. I took the vehicle to Ford and the end result was, I need a replacement battery. The SOH was at 67%. Ford is selling me the AGM with only a two year warranty. Getting a replacement from Canadian Tire with a five year warranty instead due to the failure rates of batteries these days. PS the dollar cost is the same.

This exact thing happened to me a couple of days ago. I had my BS at the dealer and one I asked them to test the battery because one of my issues was even though I am driving it around enough I thought to charge the EFB battery I kept getting the same "Engine on due to vehicle charging" and the Auto start stop has not worked since early December.They tested the battery and the SOC was 67% and the battery failed the test. They replaced it with an AGM battery. 10 months old.

 

[kshaw]

The auto stop and start feature seems to be driven by the state of charge. Drive it daily and it should work reliably. My Porsche works the same way and I need to keep it on the Battery Minder or drive it a few miles before auto stop works.

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