HUGE drop in driving range after service at dealership

[ZZBandit]

New here so apologies if there are other threads I'm not seeing that may have more info. LOVE my car btw...2021 GT with extended battery purchased used in 2023. I understand the seasonal ebb and flow in range and the nuances of battery drop over time. Experienced 2 errors..."Pre-Collision Assist Not Available" and "Driver Selectable Suspension Fault". Took to the dealership for service which did resolve the errors. At that time, at 90% charge was seeing 257 miles in range. Post dealership resolution of the noted errors...215 miles in range. Dealership shrugs shoulders and indicates they don't know what to do. Hoping to get more insight from you all around any experiences you may have had and trying to understand expectations here. Thanks for any insight and feedback!!

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[GreaseMonkey]

A LOT of threads on this topic. Reset the GOM and your range will magically go back up again. Cause that number means nothing. It’s just an estimate based on the latest efficiency numbers.

Just like the dealer shrugged, you should shrug too. Better yet, sync up and make a TikTok

 

[ZZBandit]

A LOT of threads on this topic. Reset the GOM and your range will magically go back up again. Cause that number means nothing. It’s just an estimate based on the latest efficiency numbers.

Just like the dealer shrugged, you should shrug too. Better yet, sync up and make a TikTok

Snarky is always a fun response. Thanks

 

[Mach-Lee]

Yes, please reset EV Driving History in settings. Which will reset the estimated range figure.
Settings > Vehicle > EV Driving History Reset

Range estimate will re-adjust to become more accurate over the next several hundred miles of driving.

The software was probably updated, which changes the way the range is calculated.

 

[ZZBandit]

Yes, please reset EV Driving History in settings. Which will reset the estimated range figure.
Settings > Vehicle > EV Driving History Reset

Range estimate will re-adjust to become more accurate over the next several hundred miles of driving.

The software was probably updated, which changes the way the range is calculated.

Thank you!!! I'll try that!!

 

[kdonnel]

It’s possible that what the dealer did to fix your issue reset the driving history as a side effect.

If you typically drive more conservative than what the car considers normal, your displayed range will drop if reset.

Conversely if you typically drive more aggressive than what the car considers normal, your displayed range will rise if reset.

In either case your range has not actually changed at all.

 

[OH2AZ2OH]

There was an update a few months that seemed to change my range estimate. I need to be below 50% charge before my range gets reasonably accurate. After charging to 85%, reported range is about 25 miles less than I would expect based on temps and my driving history. A 10 mile trip often uses 6 miles of estimated range when I’m above 80% charge, but then 3 miles would disappear backing out of the garage the next time I got in.

 

[WallyS56]

Thank you!!! I'll try that!!

Yes - I rest my driving history and the range at 100% charge went from 278 to 319.

 

[andyney]

New here so apologies if there are other threads I'm not seeing that may have more info. LOVE my car btw...2021 GT with extended battery purchased used in 2023. I understand the seasonal ebb and flow in range and the nuances of battery drop over time. Experienced 2 errors..."Pre-Collision Assist Not Available" and "Driver Selectable Suspension Fault". Took to the dealership for service which did resolve the errors. At that time, at 90% charge was seeing 257 miles in range. Post dealership resolution of the noted errors...215 miles in range. Dealership shrugs shoulders and indicates they don't know what to do. Hoping to get more insight from you all around any experiences you may have had and trying to understand expectations here. Thanks for any insight and feedback!!

Hello I had the same sort of issue with mileage dropping but it does change if you reset back to factory settings on car including profile etc (I know it’s a pain) but the car learns and adapts estimation mileage accordingly to your manner of driving, so if your heavy footed all the time and do short trips the full charge mileage will be considerably less, where if your a Sunday driver and do the occasional long distance trip 1 or 2 times a month your full charge mileage would be higher. They should be able to give you a battery health check but wouldn’t worry about it all.

 

[Mach e Mark]

New here so apologies if there are other threads I'm not seeing that may have more info. LOVE my car btw...2021 GT with extended battery purchased used in 2023. I understand the seasonal ebb and flow in range and the nuances of battery drop over time. Experienced 2 errors..."Pre-Collision Assist Not Available" and "Driver Selectable Suspension Fault". Took to the dealership for service which did resolve the errors. At that time, at 90% charge was seeing 257 miles in range. Post dealership resolution of the noted errors...215 miles in range. Dealership shrugs shoulders and indicates they don't know what to do. Hoping to get more insight from you all around any experiences you may have had and trying to understand expectations here. Thanks for any insight and feedback!!

The GOM (Guess O Meter) is just that, a guess. A better way to keep track of your range capability is to do a little math. Say your normal commute is 50 miles round trip each day and you are averaging 3.3 miles per kilowatt hour. You started with your battery at 90% (Really 80% but let's not get too far in the weeds here). Your battery is 4 years old so it's had a little degradation (Not much, just a little. It's been surprising me how well they hold up). Let's estimate that your battery at the 90% reading on your screen equals ~80KwH of capacity (Just estimating here. You can get more accurate numbers if you really need to). Now the math. 3.3 X 80 = 264 miles of range. You will get different numbers when you plug in more accurate data (I don't know what size battery the GT had, I could look it up but I'm lazy this morning). Enjoy the drive.

 

[Mustangor]

Funny because I had the exact opposite issue : estimated range at 100% was higher after a visit to my dealer. Sadly, this didn't last long as the software ajusted the true range after a few hundred km.

 

[Mach1E]

Funny because I had the exact opposite issue : estimated range at 100% was higher after a visit to my dealer. Sadly, this didn't last long as the software ajusted the true range after a few hundred km.

They probably forced some updates or disconnected your battery during service or something that reset things.

What’s funny about these threads is that I would bet almost everyone here owned a car before the Mach E that also had a range estimate that constantly updated based on driving. And everyone seemed to understand how that worked and didn’t seem to care if the number went up or down.

 

[ZZBandit]

The GOM (Guess O Meter) is just that, a guess. A better way to keep track of your range capability is to do a little math. Say your normal commute is 50 miles round trip each day and you are averaging 3.3 miles per kilowatt hour. You started with your battery at 90% (Really 80% but let's not get too far in the weeds here). Your battery is 4 years old so it's had a little degradation (Not much, just a little. It's been surprising me how well they hold up). Let's estimate that your battery at the 90% reading on your screen equals ~80KwH of capacity (Just estimating here. You can get more accurate numbers if you really need to). Now the math. 3.3 X 80 = 264 miles of range. You will get different numbers when you plug in more accurate data (I don't know what size battery the GT had, I could look it up but I'm lazy this morning). Enjoy the drive.

Thank you for the additional information and insight!! I really appreciate

 

[HuntingPudel]

To those who are having issues with the way the range estimator displays information, please remember that it is only an estimate. It is not your actual range, since nobody can tell the future. In many cases the range estimator (lovingly called the "GOM" or Guess-O-Meter" on the forum) can be very accurate. In cases where you are driving in a manner that is not the norm (or if your driving habits are a bit erratic like mine), it can be wildly inaccurate. Some software updates can wipe out your driving history, essentially resetting the car to its default state. This will take a little time for your car to re-learn your driving habits. Some software updates change the way the car calculates remaining range. These will require a reset of driving history and some time for the car to re-learn your habits.

Anyway, there is a difference between "range" and the "range estimate" and it can be non-trivial.

<SNIP>
What’s funny about these threads is that I would bet almost everyone here owned a car before the Mach E that also had a range estimate that constantly updated based on driving. And everyone seemed to understand how that worked and didn’t seem to care if the number went up or down.

LOL I'm in the group outside of the "almost" group. The MME was my first car with a range estimator. Since I have so much experience without one, I just use the fuel gauge like in any other car.

 

[Mach1E]

LOL I'm in the group outside of the "almost" group. The MME was my first car with a range estimator. Since I have so much experience without one, I just use the fuel gauge like in any other car.

Wow, what did you drive before?

I’ve had one in every car I’ve driven since 1998. Last one I drove without one was an 89 Bronco.

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