![]() ![]() GM dealership would not reverse the update and recover my original 10.3kwh full charge capacity. This method works 100% because I successfully performed this on my 2012 Chevy Volt car after a GM dealership reprogrammed my HCPM2 module and subsequently I lost 1.2kwh per full charge. Now charge your Volt…… your battery range will come back to the original 10.3kwh ( or whatever it was before the GM dealership HPCM2 firmware update ) per full charge range. Once you reset the HCPM2 module, turn the Volt off and back on again. ( You need to scroll down the various menus to find this “reset” option ) Next plug in the VXDiag programmer into your OBD2 port ( under the steering wheel ), run the downloaded program ( from VCXDiag website ) and “reset” the HCPM2 module in the menu. #2012 CHEVY VOLT RANGE SOFTWARE#My car is a 2013 with 102k miles, 85k of which are EV."ĭownload the free software to run the VXDiag programmer into your laptop running Windows.ĭisconnect your 12 volt battery, ( in the trunk compartment ) and swap in the used HPCM2 module ( module is located under the passenger front seat ) it is easier to remove the 2 torx bolts and lift the seat out of the way to swap the HCPM2 module out. ![]() I want to get this taken care of but my fear is they will take even more capacity away from me in order to get the message to go away. Then yesterday, when starting the car the engine was racing and the Propulsion Power Reduced warning came on with the car just sitting in my garage. Unfortunately over the past month or so I have been getting the Propulsion Power Reduced message pretty regularly while driving normally on level ground. "So about a year ago my car was reprogrammed for an unrelated issue but the affect of the programming is it dropped my usable battery capacity from 10.4 kwh to 9.4 kwh. I have given up on the whole thing and will just live with the car as is. Dealerships have been very unhelpful with the whole situation and wont do anything about the reduced range or the PPR messages. Here is a post i made about it on 3/8/18. Yes, the exact same thing happened to me and unfortunately I have been living with it and the PPR messages for well over a year now. ![]()
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