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Service High Voltage Charging System - Out of warranty

17819 Views 31 Replies 17 Participants Last post by  Cord
Got in my 2013 volt this morning to go to work, go the "service high voltage charging system" error code. What exactly does it mean? New charger needed?

Battery coolant level is fine.

I'm at 145k miles so I'm guessing out of warranty or would this be included on the 150k voltec warranty?

I have only had the car for a couple months :(
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This is ridiculous that they said SOFTWARE is not a covered component. It is EVERYTHING and it should be covered by the warranty. com'on GM!
$220 to reflash the controllers..Ridiculous. And yes, we're in the late teens of the 21st century. Software is as much part of a car as engine or transmission are. It SHOULD be covered.
I had the same thing happen, ended up paying $220 for charger software. I understand it cost alot to develop software. What gets me is that the controller worked fine for 6 years and then all of a sudden this fault happened, makes me wonder if all the update was to loosen the tolerances. To me this should be covered under warranty.
So it turns out they just updated software for two modules and charged me $232. They were going to charge me an additional $145 for diagnosis. Tech said they don't typically add the diagnostic fee into the repair bill :( Kind of lame since that was just to identify the error codes, but they waved the additional $145 this time, so that's nice. (most dealerships roll the diagnostic into the work if you decide to have it done?)

They Performed Calibration updates on the HPMC2 WCC:CBCC0 and BECM WCC:CD1C0

This was in accordance with Bulletin PIC5920G

Posted 2017-08-15
060000 ENGINE (PWS) bulletin for the 2013 VOLT
This Preliminary Information communication provides information to the technician about vehicles that will not charge and Service Engine Soon Malfunction Indicator Lamp on. Technician may find Diagnostic Trouble Codes P0AA6 and/ or a P1F0E

NHTSA has assigned ID #10114062 to this bulletin. You can get more detailed information on how to fix the problem.

They did not replace the coolant sensor.

I wonder if I should even bother re-installing the sensor bypass?

I'm wondering how often I will need to take the car in for updates and re-calibration?
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I would definitely re-install the sensor bypass--it can't hurt, but it might prevent yet another trip to the dealer.
Some one who know needs to up date us but :

I got the impression from older post that the module checking and re-flash/programming was not a fast process.
It may all be done on auto but some times has to be re-started ?

So general shop hour charges may be used ?

Hello Mr Justintoxitaced: Can you please let me know how is it going with your situation? Here in Ocala, Florida (Palm Chevrolet) is wanting to charge almost $700 in Labor ALONE because of this error message of SERVICE HIGH VOLTAGE. The car does not charge. Is your car charging? I believe that it is almost unhuman to charge that amount especially #1) if the car has had that coolant sensor problem since the beginning and GM and even bulletin is posted in their website...look at this:

#2 it seems that based on what threads are showing is that there is really no update to do because it does not exist and just recently an update that does exist that damages the vehicle.

#3) Look at this copy and paste from another member in this forum: "Explain to the dealer you are aware of the sensor issue and that you have done what many others have done to avert a costly and unnecessary repeating repair due to the high failure rate of the sensor. Show them the 520 or so comments on this forum about it and that WOT who created the fix is a GM mechanic certified on the Volt".
#4) and lastly, I am quite concerned honestly that if that dealership dares to charge that amount they are capable of damaging the car purposely now.

Keep us posted in the forum please.
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Count me in to the $230 club. Heard back from the dealer today and they are performing the same reprogramming at the same cost.

Can anyone point me to language that says this is covered under the Voltec Warranty? I'm at just shy of 75k miles.

In my 2013 Volt withn 67k miles, , I got the same message that I needed to service the charging system. I took it to my local dealer and they did some kind of programming and the problem went away, but they charged me $220. I saID IT SHOULD HAVE BEEN COVERED UNDER THE vOLTEC WARRANTEE. No, they said, and I paid. I complained to GM and they made the dealer reverse the charge!
Count me in to the $230 club. Heard back from the dealer today and they are performing the same reprogramming at the same cost.
FWIW: Anything north of @$165 ($125 VCX Nano + $40 GM SPS) would be cheaper in order to perform the calibration push yourself for your gen1 if out of warranty IMHO...
I got the impression from older post that the module checking and re-flash/programming was not a fast process.

When I pushed updated HPCM2 GM calibration software onto my Gen1 just last month, as shown above if you blinked your eyes during the process you may miss it!:rolleyes:
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I just got back from having a new 12 volt battery installed and tried to get my dealer to do the software check and programming.

Was told they no longer service Volt/bolts.
At the very least they no longer have a volt tech no idea if the equipment they do have would have done the programming.

I did get a name of another dealer in Dallas that has 2 volt tech's
Will post what I get charged later.

My total Battery charge was $218.00 172 for battery 25 for labor
Found this on

If a coolant leak is not observed, update the HPCM2 and BECM with the latest calibrations in TIS2Web. The revised calibrations are designed to improve the measurement accuracy of the internal loss of isolation DTC P0AA6. This is the more common repair for this DTC. The HPCM2 and the BECM work in conjunction to monitor and control the battery pack.

The BECM programming procedure is unique. It’s important to wait for service programming to fully complete with the checkered flag, as each of the four Battery Interface Control Modules (BICMs) are subsequently flashed once the status bar reaches 100%. Remain patient as this programming could take an additional ten minutes.

If DTC P1FFF does not clear after programming, attempt a secured high voltage code clear, as a function of the HPCM2.

The special labor operation listed in PIC5920G as well as normal programming updates for the HPCM2 and BECM are covered under the Voltec warranty period (8 years/100,000 miles, U.S., or 160,000 kilometers, Canada).
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