Auto Start question as well

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Dec 15, 2023 | 01:34 AM

Sirriggs

Thread Starter

Mountain Pass

Joined: Jul 2021

Posts: 114

Likes: 16

From: Pensacola, FL

Auto Start question as well

I didn't want to hijack the other thread. I read somewhere the battery has something to with how it acts? I am having the opposite where I have to normally turn it off when driving. I have noticed it doesn't shut off when sitting at a light. ( Not that I'm complaining since I often turn that option off). I haven't seen any loss of power with the battery either in starting or running with head lights on. I am still learning a lot about these newer trucks. Mine is the 2016 F150 with the 2.7 ecoboost. I am going to check the battery to see how old it is. I just want to make sure I am on the right track. I don't have a engine light or anything alerting me dash wise.

I have some maintenance that will be done this month. Tune up and such so getting things out of the way.

Dec 15, 2023 | 02:41 AM

85e150

Super Moderator

Joined: Apr 2004

Posts: 34,481

Likes: 2,801

AS/S not working is often an early warning for the battery. Check the age etc. My OEM lasted about 4 1/2 years.

Dec 15, 2023 | 08:11 AM

RegCab

Cross-Country

Joined: Mar 2018

Posts: 68

Likes: 17

Have battery load tested. Mine lasted a bit over four years. Load tested at 30%.
Dealer replaced battery, $208, three year warranty.
Everything works again.

Dec 15, 2023 | 06:30 PM

PupnDuck

Fleet Mechanic

Joined: Jul 2005

Posts: 1,463

Likes: 103

From: Staten Island, NY

While the battery is a prime suspect, that's not the only thing involves in the AS/S operation. From the manual:

During normal operation the auto start stop system may not stop the engine under the following conditions:

The A/C, heat or defrost settings are ON
The rear defroster is ON
The battery has a low state of charge or is below 5°C (41°F) or above 60°C (140°F)
The maximum engine off time is exceeded
The engine operating temperature is less than 60°C (140°F)
The gear selector is in the PARK, REVERSE, NEUTRAL or SECOND GEAR position
The steering wheel is turned rapidly or is at a sharp angle
Initial vehicle speed of greater than 4 km/h (2.5 MPH) and less than 2 seconds has elapsed
The vehicle is on a steep road grade
Elevation is above 10,000 feet (3,048 meters) approximately
The clutch pedal position (CPP) sensor indicates the clutch pedal is fully released

Any of the following conditions may result in an automatic restart of the engine:

The blower fan speed is increased or the climate control temperature is changed
An electrical accessory is turned ON or plugged in
Incorrect brake vacuum
The auto start stop switch is pressed to disable the system while the engine is stopped

Dec 15, 2023 | 06:34 PM

Sirriggs

Thread Starter

Mountain Pass

Joined: Jul 2021

Posts: 114

Likes: 16

From: Pensacola, FL

I will get the battery tested. Thanks

Dec 16, 2023 | 07:32 AM

SpencerPJ

Fleet Mechanic

Joined: Jan 2020

Posts: 1,364

Likes: 410

I agree, battery. Many get 3-5 years, especially those that don't get a full recharge very often (longer road trips). My guess your 2016 is on #2, going on #3 battery.

Dec 16, 2023 | 08:00 AM

Sirriggs

Thread Starter

Mountain Pass

Joined: Jul 2021

Posts: 114

Likes: 16

From: Pensacola, FL

Quote:

Originally Posted by SpencerPJ

I agree, battery. Many get 3-5 years, especially those that don't get a full recharge very often (longer road trips). My guess your 2016 is on #2, going on #3 battery.

I wouldn't be surprised. I mainly use it for local back and forth trips to work. I really don't do a lot of long trips.Maybe I need to do a couple roads trips a month driving wise to ensure good battery charge.

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Dec 26, 2023 | 08:23 AM

seventyseven250

Lead Driver

Joined: Jun 2005

Posts: 8,463

Likes: 724

From: Calgary Canada

If you are worried about short trips leaving your battery insufficiently charged, a battery maintainer, used once a week or so, is probably the simplest solution. You can get a quick-connect for it, and it takes under a minute to connect and disconnect.

Dec 26, 2023 | 05:52 PM

#10

Fat Ford Boy

More Turbo

Joined: Dec 2003

Posts: 660

Likes: 61

From: Southeast Kansas

FORD use to have a 100 month warranty on their batteries. NOW, they have a 36 month warranty. Instead of building a better battery, the lowered the warranty.

I got rid of all mine, and went to ODYSSEY batteries !!!!!!!!!!