Adaptive Cruise Control Errors and Quirks (?)

Gopher45

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I've had my Mach E for a few months now and haven't had many problems with it until today when all hell seemingly broke loose. While driving earlier today, it basically ground itself to a halt after I either turned the adaptive cruise control on on with the steering wheel controls. I often drive with the cruise control on, but have noticed a few quirks. I'll list most of them below, but one I have noticed it's not very good at slowing you down in a smooth and timely manner if you're approaching traffic stopped up ahead. That's probably more of a limitation in the technology than a problem, so I usually just drive with one pedal on and turn off cruise to begin braking for stopped traffic, then turn it back on to get going again.

I did that today as I was trying to take off from the light, and the car started to move forward a bit and almost immediately jolted itself to a stop. When it did that, there was a relatively loud sound under the car that in the moment seemed like something had fallen out from under it. After making sure nothing did, I realized it was probably the parking brake being engaged. It also started blaring the warning sound, telling me to "stop the car when safe" over and over again, and giving a whole bunch of error messages on screen that I'll also list below. I tried turning it off and on a bunch of times to get it to move, since I was blocking a fairly busy road and the tow truck dispatched by Ford Roadside was estimated to take 2 hours. Side note: after starting a roadside request with Ford, the towing company called me and tried to convince me to ditch the flatbed request to get a faster dispatch time :)rolleyes:).

Neither the parking brake nor the gear shift would budge and the car wouldn't move. On the dashboard, it was indicating that the car was in park and that the parking brake was off, but it was also telling me to "put the car in park to start the vehicle." The light on the gear shifter also said it was in park. I kept trying to mess with it and shift it to drive then park to reset it, but was unsuccessful. After waiting a bit of time for things to reset after turning the car off, I was finally able to get it moving again and drove it home. I felt relatively safe driving it home because the issues only seem to be related to cruise control, so I just avoided using it for the rest of the trip and everything was fine.

Some of the quirks that I wasn't too concerned about for one reason or another but definitely seem related are:
- When the cruise control brakes the car for itself, I hear a steady, light tapping coming from under the dashboard about every second. I assumed this was normal, but asked others in the Facebook group about it, and they didn't seem to know what I was talking about.
- I've had 3 or 4 instances where the cruise control didn't pick up on a car in front of me until a bit late, and the car would slam on the brakes to prevent a collision. I was obviously too trusting of the sensors, but after those close calls, it would tell me the adaptive cruise control was unavailable. It wouldn't work until I turned the car off and on. I guess this could be a safety measure, but with every other detail in mind, it seems a little sketchy.
- My Mach E is pretty bad at coming to stops on its own. And this is a different issue than how it can't really handle cars stopped in front of me. If I am following a car that is slowing to a stop, it's pretty good at decelerating smoothly and with enough distance. The problem comes in when we actually stop because the car brakes pretty harshly and jolts to a stop almost every time. I thought this was just a technical limitation, but again, in light of everything else....
- When I am wanting the cruise control to resume driving after a stop, if I'm in a more absent minded mood, sometimes I'll use the pedal instead of the button. Using the pedal is virtually useless in this instance though, because the car will inch forward for like half a second and then jolt itself to a hard stop again. This was one of the more concerning quirks, but again, I wasn't too bothered because I associated it with software issues and I could just work around it by using the steering wheel button.

And finally, here are the error messages I kept getting today:
- Stop Safely
- Hill Start Assist Not Available
- Pre-Collision Assist Not Available
- Shift System Fault Service Required
- Service Vehicle Soon
- Service AdvanceTrac
- Shift to Park to Start

I'm obviously going to have the dealer look at it because none of this should be happening on a 2,900 mile vehicle. I decided to cancel the tow truck just because it was going to take so long, I didn't trust them to safely transport it, and I felt comfortable driving home and to the dealer.

Has anyone else had these problems specifically related to adaptive cruise control? I know I've seen the shift system fault and pre-collision assist error messages come up on here/Facebook for problems with the shifter, cameras, and/or censors indvidiually, but it seems different since they were all at once.

Ford Mustang Mach-E Adaptive Cruise Control Errors and Quirks (?) IMG_2553
Ford Mustang Mach-E Adaptive Cruise Control Errors and Quirks (?) IMG_2551
Ford Mustang Mach-E Adaptive Cruise Control Errors and Quirks (?) IMG_2550
Ford Mustang Mach-E Adaptive Cruise Control Errors and Quirks (?) IMG_2548
Ford Mustang Mach-E Adaptive Cruise Control Errors and Quirks (?) IMG_2546
Ford Mustang Mach-E Adaptive Cruise Control Errors and Quirks (?) IMG_2547
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AZBill

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I have not seen any of these errors, but I have seen it brake very late with cars stopping in front of me. I usually hit the brakes to disengage it, and will no longer use it in stop and go traffic.

It appears that with all the error messages, you could have a 12V battery issue. Or it could be a sensor, but it seems to be too many messages for that.
 

BMT1071

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There's a bulletin for software updates related to the ADAS.
 
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Gopher45

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There's a bulletin for software updates related to the ADAS.
Do you know if that's TSB 21-2249? I found it posted here on the forums, but interestingly enough, that bulletin didn't mention AdvanceTrac or hill climb assist. Maybe I found the wrong one though?
 

BMT1071

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Do you know if that's TSB 21-2249? I found it posted here on the forums, but interestingly enough, that bulletin didn't mention AdvanceTrac or hill climb assist. Maybe I found the wrong one though?
That's the one I was thinking of for the ADAS. The other concerns will likely be fixed by updating other powertrain modules. The dealer should be able to figure that out.
 


Canchino77

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I've had my Mach E for a few months now and haven't had many problems with it until today when all hell seemingly broke loose. While driving earlier today, it basically ground itself to a halt after I either turned the adaptive cruise control on on with the steering wheel controls. I often drive with the cruise control on, but have noticed a few quirks. I'll list most of them below, but one I have noticed it's not very good at slowing you down in a smooth and timely manner if you're approaching traffic stopped up ahead. That's probably more of a limitation in the technology than a problem, so I usually just drive with one pedal on and turn off cruise to begin braking for stopped traffic, then turn it back on to get going again.

I did that today as I was trying to take off from the light, and the car started to move forward a bit and almost immediately jolted itself to a stop. When it did that, there was a relatively loud sound under the car that in the moment seemed like something had fallen out from under it. After making sure nothing did, I realized it was probably the parking brake being engaged. It also started blaring the warning sound, telling me to "stop the car when safe" over and over again, and giving a whole bunch of error messages on screen that I'll also list below. I tried turning it off and on a bunch of times to get it to move, since I was blocking a fairly busy road and the tow truck dispatched by Ford Roadside was estimated to take 2 hours. Side note: after starting a roadside request with Ford, the towing company called me and tried to convince me to ditch the flatbed request to get a faster dispatch time :)rolleyes:).

Neither the parking brake nor the gear shift would budge and the car wouldn't move. On the dashboard, it was indicating that the car was in park and that the parking brake was off, but it was also telling me to "put the car in park to start the vehicle." The light on the gear shifter also said it was in park. I kept trying to mess with it and shift it to drive then park to reset it, but was unsuccessful. After waiting a bit of time for things to reset after turning the car off, I was finally able to get it moving again and drove it home. I felt relatively safe driving it home because the issues only seem to be related to cruise control, so I just avoided using it for the rest of the trip and everything was fine.

Some of the quirks that I wasn't too concerned about for one reason or another but definitely seem related are:
- When the cruise control brakes the car for itself, I hear a steady, light tapping coming from under the dashboard about every second. I assumed this was normal, but asked others in the Facebook group about it, and they didn't seem to know what I was talking about.
- I've had 3 or 4 instances where the cruise control didn't pick up on a car in front of me until a bit late, and the car would slam on the brakes to prevent a collision. I was obviously too trusting of the sensors, but after those close calls, it would tell me the adaptive cruise control was unavailable. It wouldn't work until I turned the car off and on. I guess this could be a safety measure, but with every other detail in mind, it seems a little sketchy.
- My Mach E is pretty bad at coming to stops on its own. And this is a different issue than how it can't really handle cars stopped in front of me. If I am following a car that is slowing to a stop, it's pretty good at decelerating smoothly and with enough distance. The problem comes in when we actually stop because the car brakes pretty harshly and jolts to a stop almost every time. I thought this was just a technical limitation, but again, in light of everything else....
- When I am wanting the cruise control to resume driving after a stop, if I'm in a more absent minded mood, sometimes I'll use the pedal instead of the button. Using the pedal is virtually useless in this instance though, because the car will inch forward for like half a second and then jolt itself to a hard stop again. This was one of the more concerning quirks, but again, I wasn't too bothered because I associated it with software issues and I could just work around it by using the steering wheel button.

And finally, here are the error messages I kept getting today:
- Stop Safely
- Hill Start Assist Not Available
- Pre-Collision Assist Not Available
- Shift System Fault Service Required
- Service Vehicle Soon
- Service AdvanceTrac
- Shift to Park to Start

I'm obviously going to have the dealer look at it because none of this should be happening on a 2,900 mile vehicle. I decided to cancel the tow truck just because it was going to take so long, I didn't trust them to safely transport it, and I felt comfortable driving home and to the dealer.

Has anyone else had these problems specifically related to adaptive cruise control? I know I've seen the shift system fault and pre-collision assist error messages come up on here/Facebook for problems with the shifter, cameras, and/or censors indvidiually, but it seems different since they were all at once.

IMG_2553.jpg
IMG_2551.jpg
IMG_2550.jpg
IMG_2548.jpg
IMG_2546.jpg
IMG_2547.jpg
On day two of ownership, my car had all of those errors with the exception of the shift system fault. Apparently my MME had a brake booster failure that required replacement
 

rgonyer

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@Gopher45, did you ever get this resolved? Sorry for the thread revival, but I just had this happen yesterday, almost the exact same scenario. The only difference for me was this- I had adaptive cruise on and I was following a car as we were approaching a stop sign. Usually I shut the cruise off in this situation, but I decided to see how it would work when coming to a complete stop. That worked fine. The guy in front of me started moving to proceed through the intersection, and my car started moving as well. Since I still had to stop (4 way stop), I cancelled cruise using the middle square button, not the on/off button on the left. Suddenly I heard a god awful noise from the back end, and got all the errors you are seeing. I turned it on and off a few times with no luck, and was digging through my manual to find the ford roadside #. Fortunately it's not a very travelled road, but I shut the car off, and waved a few people past me. Waited a couple minutes, and fortunately it started back up normally after that.

I do have a concern that the car may have suffered some damage- If it was just the parking brake that was engaging while moving, probably no big deal- But it sounded worse than that to me. Almost like something in the transmission attempted to engage a parking pin. I dunno.
 

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@Gopher45, did you ever get this resolved? Sorry for the thread revival, but I just had this happen yesterday, almost the exact same scenario. The only difference for me was this- I had adaptive cruise on and I was following a car as we were approaching a stop sign. Usually I shut the cruise off in this situation, but I decided to see how it would work when coming to a complete stop. That worked fine. The guy in front of me started moving to proceed through the intersection, and my car started moving as well. Since I still had to stop (4 way stop), I cancelled cruise using the middle square button, not the on/off button on the left. Suddenly I heard a god awful noise from the back end, and got all the errors you are seeing. I turned it on and off a few times with no luck, and was digging through my manual to find the ford roadside #. Fortunately it's not a very travelled road, but I shut the car off, and waved a few people past me. Waited a couple minutes, and fortunately it started back up normally after that.

I do have a concern that the car may have suffered some damage- If it was just the parking brake that was engaging while moving, probably no big deal- But it sounded worse than that to me. Almost like something in the transmission attempted to engage a parking pin. I dunno.
Hey, rgonyer! I would like to like to into this adaptive cruise concern you’re experiencing with your Mach-E. Could you please send over a private message with your VIN and the name/location of your local Ford dealer?
 

rgonyer

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Hey, rgonyer! I would like to like to into this adaptive cruise concern you’re experiencing with your Mach-E. Could you please send over a private message with your VIN and the name/location of your local Ford dealer?
Yup, sending DM now!
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