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  1. Problems, Driver Warnings or DTCs - Gen 2 Volt
    After 2 failures to start, 2 tows to the dealer, and 2 unsuccessful attempts by the service department to diagnostically verify the issue, I finally convinced the dealer that the Battery Energy Control Module (BECM) must be the problem. The car has worked for me only once during the entire...
  2. Problems, Driver Warnings or DTCs - Gen 2 Volt
    Has anyone else noticed a direct correlation between the 12v battery voltage and BECM glitching? (I understand that BECM failures are likely different, but mine is very consistently related to the 12v rail voltage - maybe this post will help someone else. In any case, we may learn something) I...
  3. Problems, Driver Warnings or DTCs - Gen 2 Volt
    I'm not an attorney, but given the repeated stories and similarities in our experiences, I'd like to see what the pulse may be for some sort of class action. I specifically shopped for a GM Certified car in Nov. 2021 because I believed the warranty would be important. Three months later, the...
  4. Use, Care & Maintenance - Gen 1 Chevy Volt
    I recently had the "Service High Voltage Charging System" message on my 2013 Gen1 Volt come up. After taking it to the dealer they told me that the issue was caused by faults in the HPCM2 and BECM modules. They reprogrammed and recalibrated the modules and kept the car overnight to let it sit so...
  5. Generation 1 Chevy Volt (2011-2015)
    I own an Ampera and few months ago I upgraded HPCM2 and BECM modules with my SPS account. After I went from 9.6 to 8.6 kWh for a average distance of 30-37 miles. Now I want come back to the previous sw version and to do I need a VCI code. Anybody successfully obtained it from GM?
  6. Generation 1 Chevy Volt (2011-2015)
    2012 Chevrolet Volt. About 11 months ago I received a software update to my Volt. A few days ago, my car refused to charge and produced the message, “Service High Voltage Charging System” with the diagnostic codes of P1E00, P0AA6 and P1FFF. I took the car to Priority Chevrolet in...
  7. Generation 1 Chevy Volt (2011-2015)
    So I just had my 2012 Volt at the dealer due to a "Service High Voltage Charging System" Error message, and I have to say i'm rather disappointed with the dealer and Chevy. First the car is at 90,006 Miles, and this is the second time in a year that the error appeared. First the dealer issue...
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