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Auto Start/Stop Quit. F-150

Old 03-29-2021, 07:47 AM
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Default Auto Start/Stop Quit. F-150

I got a 2018 F-150 pickup and the damn auto stop has quit on me.
I kind of think it is a good thing?
What do you guys think? Should I get it fixed? I had the guys at the Quicklane oil change place check the battery and they said it was good.
Old 03-29-2021, 07:48 AM
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Most people disable it anyways.
Old 03-29-2021, 07:53 AM
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I always like to know why things on cars don’t work. A lot of the systems are field together. If my stereo sound goes out the blinkers don’t make noise. Quirky. U may be happy with result but the cause maybe a problem
Old 03-29-2021, 07:56 AM
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When mine went out the dealer had to replace the battery under warranty. They said a a tiny bit of low voltage will cause that.
Old 03-29-2021, 07:58 AM
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There is a 2 wire connector about 2" from your negative post on your battery. If it comes loose (or you remove it intentionally) it disables your battery management system; thus killing the Auto S/S functionality. There's another connector up under your steering linkage area that'll do the same thing without killing the battery management system. It will kill your trailer lights with it though....

There are a lot of things that keep the ASS (as I like to call it) from working like running of the air conditioner, power steering usage, brake position, and on and on..... it's a complicated system involving multiple ECUs and sensors. If it were me, I'd just be thankful I don't have to modify my truck or flash the ECU to get rid of the ASS!
Old 03-29-2021, 08:42 AM
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I hated my auto stop feature -bought the plug in module to disable it
Old 03-29-2021, 08:46 AM
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I had a 2017 F150 and now have a 2020 F150.

I just drive it in "Sport" so the Auto/Stop isn't in play.
Old 03-29-2021, 08:50 AM
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C'mon everybody, let's fix our auto start stop feature!!!



You might be alone on this one.
Old 03-29-2021, 09:20 AM
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Theres a button on your dashboard that disables it. somebody probably just hit the button.
Old 03-29-2021, 09:36 AM
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It happens time to time on my '18 Expedition. In every case it's been the battery being lower on juice than it wants to be. If you've been doing a lot of short trips that'll screw it up every time. Try throwing a charger on it and it should work again.

All that said, I turn mine off as soon as I get in the car. It drives me nuts on that vehicle...
Old 03-29-2021, 09:45 AM
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Originally Posted by waynesworld10 View Post
I hated my auto stop feature -bought the plug in module to disable it
Where do you purchase the module?
I hate the start stop feature
Old 03-29-2021, 09:48 AM
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I don't think I've ever heard someone liking the feature. Stupidest thing they ever did!
Old 03-29-2021, 09:59 AM
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Originally Posted by westbootie View Post
Where do you purchase the module?
I hate the start stop feature
You don't have to buy anything, you can put a jumper wire in and permanently turn it off. Do a Google search for instructions..it's very simple and almost free.
Old 03-29-2021, 10:07 AM
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I paid the $90 for the Autostop Eliminator and installed it behind the dash. Works perfectly and very happy.
Old 03-29-2021, 10:14 AM
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Originally Posted by zig10 View Post
It happens time to time on my '18 Expedition. In every case it's been the battery being lower on juice than it wants to be. If you've been doing a lot of short trips that'll screw it up every time. Try throwing a charger on it and it should work again.

All that said, I turn mine off as soon as I get in the car. It drives me nuts on that vehicle...
this could be my problem??
Old 03-29-2021, 12:33 PM
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Originally Posted by Time Out LW View Post
I paid the $90 for the Autostop Eliminator and installed it behind the dash. Works perfectly and very happy.
I keep saying it, but I am going to buy an F-150 at some point, and this is likely my solution as well.
Old 03-29-2021, 12:44 PM
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Originally Posted by Shipwreck1 View Post
this could be my problem??
I can't say specifically how Ford implements it, but it's likely that there are other things that can hold off a stop event. Things like a pending sensor failure (ie. detection of something out of range, but not enough to turn on SES light), time since last stop, etc. There should be a PID (serial data message) that shows what's holding off the stop if you care. I'd just let it go for a while, see what develops (or doesn't).
Old 03-29-2021, 12:45 PM
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Originally Posted by Time Out LW View Post
I paid the $90 for the Autostop Eliminator and installed it behind the dash. Works perfectly and very happy.
Why would you spend $90 when there is a 10 second free fix?
Old 03-29-2021, 12:58 PM
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Most people do not even know they have it.

There are 100 reasons why it will not work . Only one that it will. Battery charge/to cold /to hot/ inside temp not correct/humidity to high on and on

Some cars the restart is bad. The GM cars I drive a lot have a very good restart
Old 03-29-2021, 03:02 PM
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under the dash, there is a plug that disables it if pulled. The only side effect is that your trailer lights won't work if towing something. So, if you're like me and only tow a few times a year or something, just plug the plug back in before you hook up the trailer.
Took me all of 5 seconds and was free.

pull the bottom plug in this pic.


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