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Discussion Starter #1
I would like to share an issue I experienced on Friday May 5th. While traveling to work, my 2017 Volt LT turned on the engine check light and requested me to shift to Park. It then slowly become unresponsive to the accelerator and I had to pull it to the side of the road. I tried to turn off and on the car a few times and it kept on requesting me to shift back to Park. I left the car and walked to work. When I came back in the afternoon, it no longer asked me to shift back to Park; it simply did not respond to the accelerator. The car had an estimated 60KM electric range left when this happened. It will a cool cloudy day so the issue is unrelated to extreme temperatures.

I bought the car last August. I believe it was manufactured June 2016. There is about 2800KM on the car, most of which electric.

I called roadside assistance to have it towed to the nearest dealer in Vancouver, BC, Canada. I also called the Volt Ambassador, who returned my call on Monday. He said he would speak with the service centre at the dealership. I haven't heard back from the ambassador or the service centre yet.

I am not a subscriber of OnStar and therefore was not able to ask for a diagnosis.

Based on what I read in the forum, this issue was reported by a number of Volt 2016/17 owners. I hope this is not a design flaw.
 

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Discussion Starter #2
Update: the Volt Ambassador left a voicemail yesterday. He said the service center is ordering a "transaxle" and encourged me to call him back if the service center provides me with more info. I plan to contact the service center for an update on Monday.
 

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I would like to share an issue I experienced on Friday May 5th. While traveling to work, my 2017 Volt LT turned on the engine check light and requested me to shift to Park. It then slowly become unresponsive to the accelerator and I had to pull it to the side of the road. I tried to turn off and on the car a few times and it kept on requesting me to shift back to Park. I left the car and walked to work. When I came back in the afternoon, it no longer asked me to shift back to Park; it simply did not respond to the accelerator. The car had an estimated 60KM electric range left when this happened. It will a cool cloudy day so the issue is unrelated to extreme temperatures.

I bought the car last August. I believe it was manufactured June 2016. There is about 2800KM on the car, most of which electric.

I called roadside assistance to have it towed to the nearest dealer in Vancouver, BC, Canada. I also called the Volt Ambassador, who returned my call on Monday. He said he would speak with the service centre at the dealership. I haven't heard back from the ambassador or the service centre yet.

I am not a subscriber of OnStar and therefore was not able to ask for a diagnosis.

Based on what I read in the forum, this issue was reported by a number of Volt 2016/17 owners. I hope this is not a design flaw.
I've not had this problem...yet...and I hope I never do. But from what it sounds it, it's another "bad" component or module GM has outsourced or chosen and A) hasn't yet identified the issue or B) are taking their sweet time knowing what the problem is.

What they need to do is resolve this issue once and for all and have a recall sent out and change out the component (s) that are causing the problems.
 

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You mean the 12v? I thought it's in the rear.
The first two links answered your question with a picture of the terminal block under the front hood. The fourth link involves the service campaign to address the issue.
 

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My 2017 Volt also got a Shift to Park + Check Engine light 2 days ago. After coming to a complete stop after the Shift to Park alert (for a stop sign) I couldn't move the vehicle anymore.

During my morning drive everything felt normal but when I went out for a lunch break I felt a difference in the acceleration... I can only describe it as weird. The acceleration sounds were slightly different too. I didn't even make it 200 meters before I got the shift to park.

The dealership I was towed to initially told me it was loose power cables or something on the first day. Second day rolls around and they informed me that they were going through the wiring and wanted to keep the vehicle another day. Now this morning they said there's a problem with the shifter (with mentioning the Shift to Park) and that they have to replace the transmission.

Really a bummer since they put me in an ICE vehicle rental (an 8-seater, seriously?)... used more gas in 2 days than in 7 months in the Volt.
 

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My 2017 Volt also got a Shift to Park + Check Engine light 2 days ago. After coming to a complete stop after the Shift to Park alert (for a stop sign) I couldn't move the vehicle anymore.

During my morning drive everything felt normal but when I went out for a lunch break I felt a difference in the acceleration... I can only describe it as weird. The acceleration sounds were slightly different too. I didn't even make it 200 meters before I got the shift to park.

The dealership I was towed to initially told me it was loose power cables or something on the first day. Second day rolls around and they informed me that they were going through the wiring and wanted to keep the vehicle another day. Now this morning they said there's a problem with the shifter (with mentioning the Shift to Park) and that they have to replace the transmission.

Really a bummer since they put me in an ICE vehicle rental (an 8-seater, seriously?)... used more gas in 2 days than in 7 months in the Volt.
It seems to me there is a physical short somewhere in the motor assembly and cars that have been assembled incorrectly suffer total unit failure. Basically it sounds as though a power surge or short destroys the motor/magnets and/or transmission.
 

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Discussion Starter #11
During my morning drive everything felt normal but when I went out for a lunch break I felt a difference in the acceleration... I can only describe it as weird. The acceleration sounds were slightly different too. I didn't even make it 200 meters before I got the shift to park.
The sound also changed on mine too before the warning came up.

I've emailed the Volt ambassador and the service consultant at the dealership/service center on Monday seeking update. So far nothing. I find it odd that the service center did not even attempt to contact me once after having my car for more than 1.5 weeks ...
 

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Discussion Starter #12
Just want to provide another update.

Last Friday (May 19th) the Volt Ambassador left a voice mail indicating the transmission/transaxle had arrived. He left another voice mail yesterday (May 24th) asking how the car was, assuming the repair was complete, while throughout the whole period (almost three weeks), the dealer service department never contacted me.

I called the Ambassador today, indicating that I have not heard yet from the service department. He got in touch with the service manager and informed me that the transmission was installed, but the "programming" is not right and the technician is working with GM on the "programming". I also got a call directly soon after from the service consultant who took my car in, confirming the situation. Sounds like it may take a few more days ...

Not sure what this "programming" is. According the service consultant, transmissions usually came already programmed but this one was not (or at least not correctly "programmed"). I do not know how true a statement this is ...
 

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Just want to provide another update.

Last Friday (May 19th) the Volt Ambassador left a voice mail indicating the transmission/transaxle had arrived. He left another voice mail yesterday (May 24th) asking how the car was, assuming the repair was complete, while throughout the whole period (almost three weeks), the dealer service department never contacted me.

I called the Ambassador today, indicating that I have not heard yet from the service department. He got in touch with the service manager and informed me that the transmission was installed, but the "programming" is not right and the technician is working with GM on the "programming". I also got a call directly soon after from the service consultant who took my car in, confirming the situation. Sounds like it may take a few more days ...

Not sure what this "programming" is. According the service consultant, transmissions usually came already programmed but this one was not (or at least not correctly "programmed"). I do not know how true a statement this is ...
Update on my Volt that lost power and got Shift to Park too...

Wednesday (May 24) afternoon the dealer said they completed the transmission installation and that they needed my 2nd key for reprogramming or something, so I deliver the key Thursday (May 25) morning.

Thursday morning, the service adviser made a remark that made me think he's trying to stall for time... saying he wanted to keep the car until the afternoon to "charge" it (saying it would be low because they're working on it), even though I've been checking on the car status in the myChevrolet app and saw the battery at 87% on Wednesday night (notably none of the TPMS sensors are reporting any tire pressures - I assume they removed the wheels to work on the transmission or the TPMS needs to be relearned after the transmission replacement).

Thursday afternoon comes and the service adviser calls me to say that he needed to keep the car overnight because the "programming" was taking longer than they expected (mentioning 8 or 9 modules). I checked the car status in the app Thursday night and the battery is at 86% (TMPS still not reporting anything).

Friday (May 26) morning, they call me to tell me that "something is wrong with the car" and they needed to bring in an engineer (from GM?).

Since delivering my 2nd key, I've gotten 3 emails/texts from the Theft Alarm Notification from OnStar.
At least it seems like they're working on the car...
 

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Discussion Starter #14
Update on my Volt that lost power and got Shift to Park too...

Wednesday (May 24) afternoon the dealer said they completed the transmission installation and that they needed my 2nd key for reprogramming or something, so I deliver the key Thursday (May 25) morning.

Thursday morning, the service adviser made a remark that made me think he's trying to stall for time... saying he wanted to keep the car until the afternoon to "charge" it (saying it would be low because they're working on it), even though I've been checking on the car status in the myChevrolet app and saw the battery at 87% on Wednesday night (notably none of the TPMS sensors are reporting any tire pressures - I assume they removed the wheels to work on the transmission or the TPMS needs to be relearned after the transmission replacement).

Thursday afternoon comes and the service adviser calls me to say that he needed to keep the car overnight because the "programming" was taking longer than they expected (mentioning 8 or 9 modules). I checked the car status in the app Thursday night and the battery is at 86% (TMPS still not reporting anything).

Friday (May 26) morning, they call me to tell me that "something is wrong with the car" and they needed to bring in an engineer (from GM?).

Since delivering my 2nd key, I've gotten 3 emails/texts from the Theft Alarm Notification from OnStar.
At least it seems like they're working on the car...
So far your experience is almost the same as mine except my dealer hasn't asked for the second key, and hasn't provided an update regarding how the programming is going. Let's see what happens next week ...
 

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Finally got my car back.
Here's the work that was done to it:
Quantity | Description/Correction
1    | 19301761 - WIRE ASM-SPLICE - Warranty
1    | 24286577 - TRANSAXLE ASM-AUTO - Warranty
1    | 10953456 - COOLANT, 50/50 MIX DEXCOOL AND DE-IONIZE - Warranty
1    | 19264718 - FLUID,A/TRNS - DEXRON VI - 5L - Warranty
2    | 19264717 - FLUID,A/TRNS DEXRON VI - 1L - Warranty

codes P1AEE, P1AEF, P1AF0, P1AF2, P1E22, found PIC6244

Tech comments: replaced transmission assembly and completed, program and imobilizer learn performed


On 5/26/17 there's a note: check and report for imobilizer not learning
Cause/correction not defined

Looking at http://gm-volt.com/forum/showthread.php?282561-PIC6244-quot-Shift-To-Park-quot-Message-Multiple-Propulsion-Transmission-DTCs

P1AEE - Drive Motor A voltage high
Voltage measured at MGA was higher than 450V
P1AEF - Drive Motor B voltage high
Same as above, measured at MGB
P1AF0 - Drive Motor A Fault/Isolation lost between mid-pack voltage and chassis
Essentially, part of the battery got shorted to the chassis through Drive Motor A
P1AF2 - Drive Motor B Fault/Isolation lost between mid-pack voltage and chassis
Same as above but through Drive Motor B
P1E22 - Auxiliary transmission fluid pump fault
Same as P1AF0/2, shorted through transmission fluid pump
I got all five DTCs in http://sandyblogs.com/techlink/?p=7226
The following DTCs may be set:
P1AEE – Drive Motor 1 Control Module Hybrid/EV Battery System Voltage High Voltage
P1AEF– Drive Motor 2 Control Module Hybrid/EV Battery System Voltage High Voltage
P1AF0 – Drive Motor 1 Control Module Hybrid/EV Battery Voltage System Isolation Lost
P1AF2 – Drive Motor 2 Control Module Hybrid/EV Battery Voltage System Isolation Lost
P1E22 – Auxiliary Transmission Fluid Pump Control Module Hybrid/EV Battery Voltage System Isolation Lost
I hope this isn't a design flaw...
 

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Discussion Starter #17
Finally got my car back.
Here's the work that was done to it:
Quantity | Description/Correction
1    | 19301761 - WIRE ASM-SPLICE - Warranty
1    | 24286577 - TRANSAXLE ASM-AUTO - Warranty
1    | 10953456 - COOLANT, 50/50 MIX DEXCOOL AND DE-IONIZE - Warranty
1    | 19264718 - FLUID,A/TRNS - DEXRON VI - 5L - Warranty
2    | 19264717 - FLUID,A/TRNS DEXRON VI - 1L - Warranty

codes P1AEE, P1AEF, P1AF0, P1AF2, P1E22, found PIC6244

Tech comments: replaced transmission assembly and completed, program and imobilizer learn performed


On 5/26/17 there's a note: check and report for imobilizer not learning
Cause/correction not defined
I also got a call today that mine is ready to pickup. I'll share the repair info tomorrow. Just curious, do you know when your Volt was manufactured? I was told mine was around June 2016.
 

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I also got a call today that mine is ready to pickup. I'll share the repair info tomorrow. Just curious, do you know when your Volt was manufactured? I was told mine was around June 2016.
I think my Volt was manufactured in September 2016. I made a custom order at the end of August and received it in October 2016.
 

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Heads up to both of you that you can find your manufacture date on a placard located toward the bottom of the B pillar, just open your driver door and look down that pillar in front of you. You will see the manufacture date at the top right of that placard, MM/YY.
 

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Discussion Starter #20 (Edited)
Update: Got my car back finally. Here are some excerpts from service document :

"vehicle would not drive. pushed into shop. scan test, p1af0 p1af2 p1b0b p1b42 p07a3.. meets criteria for pic6244. needs trans.. "
"ATTEMPT TO PROGRAM TRANS MODULE. UNABLE HOLD FOR INFO FROM TAC. PROGRAM"

The explanation from the service consultant is essentially the same as on my previous update. According to him the transmission arrived about 1.5 weeks ago and was installed last week, but the transmission did not have the required programming. The shop requested GM to provide access to the programming. After the transmission programming was done, the shop proceeded with other programming (related to some recalls I assume). The shop test-drove the car to confirm it worked ok then contacted me to pick up the car.

I've only driven the Volt for a short distance so far and it seems ok.

DTC P1AF0: Drive Motor 1 Control Module Hybrid Battery/EV Voltage System Isolation Lost
DTC P1AF2: Drive Motor 2 Control Module Hybrid Battery/EV Voltage System Isolation Lost
DTC P1B0B: Drive Motor 1 Control Module Hybrid/EV Battery Voltage Isolation Sensing Circuit 2 Low Voltage
DTC P1B42: Drive Motor 2 Control Module Hybrid/EV Battery Voltage Isolation Sensing Performance
DTC P07A3: Transmission Clutch 1 Stuck On
 
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