It looks like the car that had it covered under warranty was a 2013 with under 100k miles, so 5/100 powertrain warranty was likely still in play. That does cover this issue, but the Voltec warranty doesn't cover it.
Here are the relevant threads:
http://gm-volt.com/forum/showthread.php?13194-quot-Service-High-Voltage-Charging-System-quot-Message
http://gm-volt.com/forum/showthread...H-VOLTAGE-CHARGING-SYSTEM-MESSAGE-DEFEAT-PLUG
Order WOTs sensor now since it takes a while to arrive.
I just fixed this on my car and explained how in a recent post in the first thread. It's not simple, requires special equipment, and requires computer skills.
If you're going to bring it to the dealer, I highly recommend educating yourself first so that you can tell them exactly what you want done. Otherwise they'll likely not know how to fix it and will spend hours trying to figure it out. You don't want to pay for that. They're going to see a code about a battery isolation issue and want to track that down. It's a false code and you don't want them wasting hours on it. They only need to do the following:
1. Replace battery coolant sensor.
2. Reprogram HPCM2 module, even if SPS says it's up to date. They need to re-apply the same version. That's the only way to clear the special low battery coolant code.
3. Clear all DTCs
If you can convince them to do that, it should only cost you $21 for the sensor and 1-2 hours of labor.
Here are the relevant threads:
http://gm-volt.com/forum/showthread.php?13194-quot-Service-High-Voltage-Charging-System-quot-Message
http://gm-volt.com/forum/showthread...H-VOLTAGE-CHARGING-SYSTEM-MESSAGE-DEFEAT-PLUG
Order WOTs sensor now since it takes a while to arrive.
I just fixed this on my car and explained how in a recent post in the first thread. It's not simple, requires special equipment, and requires computer skills.
If you're going to bring it to the dealer, I highly recommend educating yourself first so that you can tell them exactly what you want done. Otherwise they'll likely not know how to fix it and will spend hours trying to figure it out. You don't want to pay for that. They're going to see a code about a battery isolation issue and want to track that down. It's a false code and you don't want them wasting hours on it. They only need to do the following:
1. Replace battery coolant sensor.
2. Reprogram HPCM2 module, even if SPS says it's up to date. They need to re-apply the same version. That's the only way to clear the special low battery coolant code.
3. Clear all DTCs
If you can convince them to do that, it should only cost you $21 for the sensor and 1-2 hours of labor.
