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Discussion Starter #1 (Edited)
Hi all,
I went to the dealer yesterday to perform the recall:
Recall Number
18V397000
Component
HYBRID PROPULSION SYSTEM
Summary
General Motors LLC (GM) is recalling certain 2013 Chevrolet Volt vehicles. An update to the Hybrid Powertrain Control Module 2 (HPCM2) may have disabled the cell balancing function causing a low-voltage condition.
Consequence
If the voltage drops, the vehicle may lose propulsion, increasing the risk of crash.
This evening, coming back from work, I lost propulsion power completely suddenly. (I thought the recall is supposed to fix that, not cause that!) The car engine light turned on and although I have half a tank of gasonline left, it refuses to use it. So I was stranded by a hospital and my wife had to come, and we pushed the car into a parking lot spot.
When the car is restarted, it keeps on repeating the same thing.
The DTC display showed P1E00 Hybrid Powertrain Control Module 2 requrested MIL illumination.
Any idea on what to do next? Go back to the dealer who performed the recall that sabotaged the car?
 

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As noted above, P1E00 will only show up with other codes - and those other codes will tell us what's going on; P1E00 just says the boss powertrain computer turned the light on because of a powertrain problem.
 

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Discussion Starter #4
OK, just went out to the dead car and got the code!
hybrid power train control module 2
code:p0AFA
Hybrid/EV battery system battery low voltage

And I can read 2 cells of battery 3 being 2.7V when all other cells are 3.2V.
Any thoughts?
 

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Possible control module failure. Possible faulty firmware update. Possible battery cell issue? My guess would be the control module itself has failed.
 

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Sorry to hear about this dangerous situation.

Have you used and trusted this dealership before? Mistakes happen. "Sabotage" is a deliberate/willful act to destroy. Not a good idea to accuse someone of sabotage.

Regardless, since they performed the recall, they'll need to pay for the flat-bed tow back to their shop. Give them another chance, if...if...you trust them.

(Where do you live? Putting your location in your signature assists members, who might be able to offer you opinions on trusted dealerships in your area.)
 

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OK, just went out to the dead car and got the code!
hybrid power train control module 2
code:p0AFA
Hybrid/EV battery system battery low voltage

And I can read 2 cells of battery 3 being 2.7V when all other cells are 3.2V.
Any thoughts?
The most likely answer is that those two cell triplets have a shorted cell and will need to be replaced (usually I think they replace one of four modules.) That will be covered under the Voltec warranty.
 

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Interesting coincidence. Perhaps, the problem had already extended far enough that by the time they did the update, it couldn't correct the low-volt issue, and it just so happens, the very next day is when the problem raised its ugly head.
 

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Discussion Starter #11 (Edited)
So the story continues.
I called GM customer support 5am in the morning(they work with eastern time). After describing the problems and making a record, they told me the case is established and they will need to have the California team reach out to me "in 2 or 3 days" because CA has a different set of policy and the car is different too.
While waiting, I called the local dealer and was told that they won't be responsible for towing the car because they didn't do anything wrong with working on the recall, so I have to get it there by myself.
Spent $55 for towing, and Carlos of the GM California team reached out to me before I reached the local dealer. He is quick to say that he will send an email to the dealer saying that GM is now involved and answered several of my questions.
By this time I already have the following pictures in my pocket, but I didn't want to influence the local dealer's independent opinion. I was almost certain that it's a battery failure and the HV battery will need to be replaced.
https://ibb.co/mu1VVL
https://ibb.co/mfq7AL
https://ibb.co/fDqkx0

Once I got to the dealer, I talked with their Volt technician, and hinted on the possibility of a battery failure. They promised to check and the general diagnosis costs $115, which is to be reimbursed if PZEV warranty covers the error code (15 years 150K miles in CA).
Long and behold. In the afternoon I received the call from them saying 20 out of the 96 cells have failed. (Using GM standard checking procedure, they were below about 3V when depleted). They said GM will cover all the cost of replacing the battery(>$10K just for the manual labor) and ship a battery from east coast. It will not be done before thanksgiving.
Will keep everyone here updated!
 

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More than $10k for labor? There's no way. It's half a dozen easy connectors on the front and a couple dozen bolts across the bottom. There have been a lot of answers given for the cost of the pack over the years with little consistency, but it's only a few hours of labor to replace.

Glad you have a clear path forward and they aren't fighting warranty coverage. :)
 

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More than $10k for labor? There's no way. It's half a dozen easy connectors on the front and a couple dozen bolts across the bottom. There have been a lot of answers given for the cost of the pack over the years with little consistency, but it's only a few hours of labor to replace.

Glad you have a clear path forward and they aren't fighting warranty coverage. :)
Agreed, labor should be no more than $1k for pack replacement. The pack itself is probably $8k though. Thank goodness for warranty.


Sent from my iPhone using Tapatalk
 

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Discussion Starter #14
I guess the dealer was exaggerating on the labor charge. Updated the link to the pictures for my previous post.
 

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Discussion Starter #15
More than $10k for labor? There's no way. It's half a dozen easy connectors on the front and a couple dozen bolts across the bottom. There have been a lot of answers given for the cost of the pack over the years with little consistency, but it's only a few hours of labor to replace.

Glad you have a clear path forward and they aren't fighting warranty coverage. :)
Do they need to drain the coolant for the battery system in the process?
Maybe that can save me from having to do it myself?
 

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The recall was to restore the battery balancing procedure. I wonder if the lack of that prior to the recall work caused the battery problem.
 

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The 2011's (and some 2012's) had their batteries dropped in order to add some tunnel reinforcements. It was an hour process to drop the battery add the tunnel reinforcement, put the battery back in. $10,000 and hour? Where do I sign up? :)
 

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No way 20 cells would die in one day
But indeed, lack of balancing would cause weaker cells to drop lower and lower.

And when you drove and depleted the battery, they dropped below the low limit and triggered the warning

If you would have not depleted the battery and topped it up a few times it might have balanced itself and caused no problems

But hey - this was at least you get a free new battery :)
 

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Then the dealer needs to cycle the battery as part of the recall balancing process.

And I too had the battery dropped as part of the 2011-2012 tunnel reinforcements and we got the wonky tank sensor and cable added.
and the process only took longer as they could not find the special high voltage gloves.
 
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