Failure Notifications on Restart

[Fonz54]

I know I recently read about a similar situation/occurrence of this condition I experienced yesterday. This has happened to me several times previousl as well. I went to pickup my son at school. I parked the Bronco but did not exit. Accessory power remained on as expected and then timed out. My son then got in the truck. I stepped on the brake and hit the start button and all kinds of warning lights came on - Brake Failure, Crash Detect Failure, Hill assist failure...I hit the OK button and they all cleared. Like I said this has happened several times and it seems like it occurs if you turn off the engine and do not exit the vehicle. It has also happened when I turn the truck off and then restart it before the accessory power times out. It would appear that some code in the PCM does not exit correctly if you don't exit the vehicle. Just a guess. Have also experienced the bogus collision warning just driving down the road without any cars around. Ford has there been any analysis regarding these hopefully bogus failure messages? Perhaps it is the old GIGO coding problem.

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[Fonz54]

Wow - thought I would get a few replies on this one!
Today I opened the door to kill the accessory power. Started the truck and got all kinds of failure messages and the parking brake was on. I did not set it. Something just is wrong here.

 

[Lanshark]

I also sit in the pick up lane at school every day, up to 20 mins, same scenario. I was just about to google why the parking brake is setting itself. I did have one incident where I got a single warning, and couldnt make the brake disengage. Holding up that line feels like that same anxiety I got as a kid when you were at the grocery store checking out and your mom is like stay here, I'm just going to run and get something. lol Anyway, I digress... it happened today after a week or so since the last time, but without warnings. Today, I had opened the door, so things turned off at that time. I never heard the parking brake engage, it makes a pretty unique sound.

 

[Fonz54]

I also sit in the pick up lane at school every day, up to 20 mins, same scenario. I was just about to google why the parking brake is setting itself. I did have one incident where I got a single warning, and couldnt make the brake disengage. Holding up that line feels like that same anxiety I got as a kid when you were at the grocery store checking out and your mom is like stay here, I'm just going to run and get something. lol Anyway, I digress... it happened today after a week or so since the last time, but without warnings. Today, I had opened the door, so things turned off at that time. I never heard the parking brake engage, it makes a pretty unique sound.

Agree with you on the sound the parking brake makes when it engages. I am hoping that maybe the Ford person or persons that is part of the forum here would provide some insight as to what is going on. Half expecting to get a “Game Over” message with one of those Nintendo sounds you get when your character dies!

 

[HotdogThud]

I've seen similar, usually if I press the start button for just barely not long enough to start it and then hit it again to start the car. My best guess is that the ECU is checking all of those systems as the car is starting up, and hitting the start button at the just the wrong point in that sequence causes the car to start without it having completed all of those pre-flight checks. fully starting the car always clears them for me. usually manifests as a blinker and trailer brake system fault when I see it

 

[Fonz54]

I've seen similar, usually if I press the start button for just barely not long enough to start it and then hit it again to start the car. My best guess is that the ECU is checking all of those systems as the car is starting up, and hitting the start button at the just the wrong point in that sequence causes the car to start without it having completed all of those pre-flight checks. fully starting the car always clears them for me. usually manifests as a blinker and trailer brake system fault when I see it

It happens to me with my foot on the brake and pressing the start button. Sometimes they clear and most times you need to hit the OK button. The fact that the parking brake engages just happened for the first time for me yesterday.

 

[KABQ]

Hi I'm the guy from the other post haha. Unfortunately no resolution on my end. I hate that other people are having similar issues, but at the same time I'm kind of relieved it isn't just me. Hopefully eventually a dealership will take it seriously and we'll find a solution!

 

[KABQ]

I also sit in the pick up lane at school every day, up to 20 mins, same scenario. I was just about to google why the parking brake is setting itself. I did have one incident where I got a single warning, and couldnt make the brake disengage. Holding up that line feels like that same anxiety I got as a kid when you were at the grocery store checking out and your mom is like stay here, I'm just going to run and get something. lol Anyway, I digress... it happened today after a week or so since the last time, but without warnings. Today, I had opened the door, so things turned off at that time. I never heard the parking brake engage, it makes a pretty unique sound.

That describes the feeling PERFECTLY!

 

[Fonz54]

Hi I'm the guy from the other post haha. Unfortunately no resolution on my end. I hate that other people are having similar issues, but at the same time I'm kind of relieved it isn't just me. Hopefully eventually a dealership will take it seriously and we'll find a solution!

I have yet to bring it to the dealer to have them try and figure it out. I am hoping that the Ford person here is reading these posts and they are doing some sort of Failure Mode Analysis! Seems to me it would be worthy of a recall.

 

[KABQ]

I have yet to bring it to the dealer to have them try and figure it out. I am hoping that the Ford person here is reading these posts and they are doing some sort of Failure Mode Analysis! Seems to me it would be worthy of a recall.

I'd even take a simple "this is what causes it, don't do xyz."

 

[NORCALGXP]

I have had the same thing happen twice in the past back last year. Except for the son exiting.

"I parked the Bronco but did not exit. Accessory power remained on as expected and then timed out. My son then got in the truck. I stepped on the brake and hit the start button and all kinds of warning lights came on - Brake Failure, Crash Detect Failure, Hill assist failure...I hit the OK button and they all cleared. Like I said this has happened several times and it seems like it occurs if you turn off the engine and do not exit the vehicle."

 

[Lanshark]

In my case today, I had been sitting in line for 30 seconds, ign off, but accessory had yet to time out. I wanted to make a call, but not over the hands free. I just got this vehicle, I dont know how to override the accessory time out, so I just popped my door open for a second and closed it. Seemed to accomplish my goal, but that sequence displeased the vehicle in some way.

(add to that, I think I overrode the auto stop/start as I approached the school in traffic)

 

[kiya]

Same exact thing has been happening to me. Has happened maybe 5 times in the 2 months I've had the car..

 

[Fonz54]

Did it seem like the battery was weak ?
Bronco is a battery hog and the factory alternator could be not the best. At home we keep it on the battery tender all the time

I have not checked the battery with a meter. Will give that a shot today. The Bronco is a daily driver so I did not consider using a trickle charger.

 

[KABQ]

Same exact thing has been happening to me. Has happened maybe 5 times in the 2 months I've had the car..

Does it happen while sitting for extended periods? That seems to be the most common similarity for most of these, but I know correlation doesn't always mean causation.

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