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Minor issue with limited affected cars. Popped up in my google news feed today. Looks like GM is reaching out to affected customers. They must know by a range of VINs or something.

Title: General Motors Notifies Early Chevy Bolt Owners of Potential Battery Failure
By Brad Berman · August 24, 2017

http://www.plugincars.com/general-motors-notifies-early-bolt-owners-potential-battery-failure-133131.html

Kevin Kelly, ‎senior manager for advanced technology communications at General Motors, said that the problem might affect less than one percent of early Bolt production models. The company is proactively reaching out to “fewer than a couple hundred customers” that could be impacted, according to Kelly. The remedy is to replace the entire battery pack, even if only one cell is faulty.

“We noticed an anomaly via data from OnStar and that led us to investigate the issue,” said Kelly. He said that the problem is caused by one or more of the cells malfunctioning and thereby providing a false reading of remaining range on the dashboard.
 

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Where is Bro?

If this were Tesla, he'd be blasting this all over the internet. But it's a Bolt do he don't. :)

Glad to see GM being proactive (again!) when dealing with potential issues. Just like they did with Gen 1 Volt's, and one reason I'm considering a Bolt.
 

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On that Tuesday afternoon, the dashboard indicated approximately 100 miles of remaining range. (Because I was less than one mile away from home, I did not take note of the exact state of charge.) After a few seconds of a warning chime, the steering wheel shuddered, and the vehicle quickly came to a complete stop in the middle of the road. When I looked down at the dashboard, the indicated remaining range had abruptly changed to nine miles.

The behavior of the vehicle was not like driving an EV with a depleted battery, as I have experienced in other electric vehicles. In those cases—sometimes referred to as “turtle mode”—the power output is reduced, enabling the driver to travel at a reduced speed for a couple of miles or at least safely move to the side of the road before the battery is fully depleted.

Instead, in the Bolt, I was left behind the wheel of a disabled vehicle (in the middle of a curvy road where vehicles often zip around corners). The car could be powered up but not shifted into Drive or Reverse. After multiple failed attempts to shift into Drive after restarting the car, I shifted into Neutral and drifted down a slight incline to reposition the car more safely on the side of the road (although blocking a neighbor’s driveway).
Sure sounds scary. I'd be less concerned with a bad battery cell and more concerned with how this vehicle responded to it.
 

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Where is Bro?

If this were Tesla, he'd be blasting this all over the internet. But it's a Bolt do he don't.


Glad to see GM being proactive (again!) when dealing with potential issues. Just like they did with Gen 1 Volt's, and one reason I'm considering a Bolt.
I already posted it to the FB Bolt owners group.
Since it was already posted here, no need to double post. Last Tesla article I posted was already 2 days old before I found it. Need to hire some news feed scrubbers.
 

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Seems like the cell changes the estimate. Unsure if the range actually decreases and the estimate is correct or if the estimate of the range overstates the remaining range or something else.
 

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Seems like the cell changes the estimate. Unsure if the range actually decreases and the estimate is correct or if the estimate of the range overstates the remaining range or something else.
That's one reason I continue to reset my trip odo with every recharge- that will give you a good idea if something fishy is going on regarding the Guess-O-Meter.

Like Regan said... "trust, but verify"
 

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I hear there's a recall on the Spark EV for overestimating range. It just involves reprogramming, though.
 

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So I experienced a very sudden loss of propulsion today, and am wondering if I might have an affected car although my VIN indicates I'm not on the recall list. While driving at about 40 mph with 37 miles charge showing, the car suddenly showed the "Low Propulsion" warning, cut power suddenly, which was only enough to propel the car at 5-10 mph. It allowed us to drive at greatly reduced power mode for about 15 secs before all propulsion power was gone. While it was in this mode, the car's battery gauge still showed 37 miles of charge remaining. Upon pulling to the side of the road, the car was powered off and then on, and the car would not provide any propulsion at all.

The fact that it was signaling 37 miles of range and only giving me 15 secs of propulsion tells me I have a battery and/or software problem. I was going to call/chat with Chevy technical support to see what they think. My hope is that my local dealer has the equipment to diagnose the health of my battery pack, and perhaps pull an internal code that says more about what happened. Any other steps that I should take?

Thanks!
 

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So I experienced a very sudden loss of propulsion today, and am wondering if I might have an affected car although my VIN indicates I'm not on the recall list. While driving at about 40 mph with 37 miles charge showing, the car suddenly showed the "Low Propulsion" warning, cut power suddenly, which was only enough to propel the car at 5-10 mph. It allowed us to drive at greatly reduced power mode for about 15 secs before all propulsion power was gone. While it was in this mode, the car's battery gauge still showed 37 miles of charge remaining. Upon pulling to the side of the road, the car was powered off and then on, and the car would not provide any propulsion at all.

The fact that it was signaling 37 miles of range and only giving me 15 secs of propulsion tells me I have a battery and/or software problem. I was going to call/chat with Chevy technical support to see what they think. My hope is that my local dealer has the equipment to diagnose the health of my battery pack, and perhaps pull an internal code that says more about what happened. Any other steps that I should take?

Thanks!
That seems like a major problem. Have you talked with anyone at Chevy? If so did they say it was a battery problem or just some random error?
 

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<off-topic>

Now what is GM doing for this poster running out of battery and being stranded on the side of the road? Also is this a problem with the software that will affect more than just this bolt? Or is this a problem with the battery and it is falling outside the 1% of those affected?
 

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We called our local Chevy dealer, and they have yet to have a Bolt specialist call us back. Might try a different dealer. I hope that the dealers have the tools to perform a comprehensive battery system diagnostic. This experience has made my wife (who is the primary Bolt driver) start to feel range anxiety, which contradicts the main reason we got this car.
 

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We called our local Chevy dealer, and they have yet to have a Bolt specialist call us back. Might try a different dealer. I hope that the dealers have the tools to perform a comprehensive battery system diagnostic. This experience has made my wife (who is the primary Bolt driver) start to feel range anxiety, which contradicts the main reason we got this car.
Does the bolt have bolt advisors like the volt had? Maybe one of them can help?

I am sure there is someone on this board that can get you to a GM rep that can get the process going.
 

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No, Bolt, Volt, Sierra, doesn't matter. Just people who answer the phone and can make dealer appointments. They can also tell you which dealerships have Bolt certified technicians, though you could make a few calls on your own to determine that.

I know who those are locally because they are also selling Bolts and have a few on the lot. Fortunately for me there are at least 6 or so within 5 miles of my house. Unfortunately the mechanics union is currently on strike.
 

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I hope GM gets a handle on this potential disaster ASAP. I really want the Bolt to be a success such that GM will build more and more pure BEV's. As much as I like Tesla, I don't want them to be the only game in town.
 

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I hope GM gets a handle on this potential disaster ASAP.

Disaster seems a bit of hyperbolic. Less than 1% are affected and GM already has a "handle" on it as noted in the initial post by Scott. It certainly did not stop me from buying a Bolt EV. I have personally found GM to be very responsive to real or potential issues.
 

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I hope GM gets a handle on this potential disaster ASAP.

Disaster seems a bit of hyperbolic. Less than 1% are affected and GM already has a "handle" on it as noted in the initial post by Scott. It certainly did not stop me from buying a Bolt EV. I have personally found GM to be very responsive to real or potential issues.
Even the ridiculous such as the "My wife---er Bolt became sentient and crashed itself in my garage" claim.
 

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Disaster seems a bit of hyperbolic. Less than 1% are affected and GM already has a "handle" on it as noted in the initial post by Scott. It certainly did not stop me from buying a Bolt EV. I have personally found GM to be very responsive to real or potential issues.
You're right it isn't anywhere close to a disaster yet. But it also looks like it may affect more than just 1% as this poster looks like he falls outside of the recall. If that is the case it could be larger than initially thought and that is not good for any EV as it gives detractors more ammunition against going electric. As leaving people with no battery power that thought they still had 35+ miles left stranded on the side of the road makes all EV look bad not just the bolt.
 

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I dropped off the Bolt with a Chevy dealer this morning, and got a call back just now. The only fault code they saw is one saying that there was a loss of communication with the transmission system. As a result, they found nothing wrong pointing to the sudden loss of power I saw with 37 miles showing on the battery. The service tech said that the car should leave a code if it entered low propulsion mode- if true, this is very troubling that the car did not record this occurrence at all. I asked if they have the ability to use a tool to do a full diagnosis of the battery pack, and the answer was very vague: "Sure, if we see the code come up about the battery, we can check that."

I went onto the Chevy support chat last week, but the person there was not at all technical and just told me to see a dealer. If there is a forum where we can get a more knowledgeable person, that would be great.

As next step, I'm going to drive (while close to home) until the battery goes to a similarly low capacity to see if I can get it to replicate. Might rig up a GoPro to capture the failure if I can get it to happen again.
 

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Real time update: I was just on live chat with Chevy support, and after giving them my VIN, they said my car is part of the recall. I told her already checked the website, and it wasn't part of the recall. But I checked once more while on chat, and just today, my VIN got added to the recall list. Makes me wonder if it was always known to be affected and they're doing a rolling communication so they can keep up with the replacement battery supply.

So good news is that I'm not crazy and this is covered. But kind of scary that they will replace the entire battery pack (is that really a serviceable part?). I assume it could take a while for the replacement battery pack to come in, so will just keep driving and topping off the charge daily until then.
 
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