Service High Voltage Charging System - Out of 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

TSB #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.

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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?

PALM CHEVROLET OCALA FL CHARGES ALMOST $700 FOR LABOR SERVICE HIGH VOLTAGE MESSA

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 NHSTA.gov bulletin is posted in their website...look at this: static.nhtsa.gov/odi/tsbs/2013/SB-10052204-6977.pdf

#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.

Cord said:

I got the impression from older post that the module checking and re-flash/programming was not a fast process.

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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!

Found this on
https://sandyblogs.com/techlink/?p=8089


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).