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Service High Voltage Charging System - Out of warranty

17837 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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If it is related to the coolant sensor going bad, the codes appear to be cleared but they will return. There is a module that has to be reprogrammed/reflashed to clear them permanently. FYI, I have had the defeat plug installed and have had the car in and I don’t believe anyone has even noticed or clued in. I lost the original sensor too so I don’t have one to put back in even if I wanted to. 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.
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