Join Date: Jun 2010
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I had this issue with my TCH and a brief moment of fear with my 12 HiHy.
Should you decide to use Torque app and CHEAP OBD2 BT adapter, this eventually will trip Check VSC light. Discontinuing BT adapter apparently corrects the issue when parked overnight without it. How this works I don't know, I cam across this in Prius forum.
So yes, I was driving for quite a while with $8 BT OBD2 adapter in my TCH and started getting those "ABS/VSC" warning lights. They will disappear for a day or half day after overnight parking but then come back. I eventually found that Prius post on BT adapter, discontinued it and that was it.
Out of curiosity I tried same adapter in HiHY and sure enough, after about 4 weeks of driving with it plugged in, same lights came up. Discontinued adapter.
Also, CAN bus/ABS code reader will read ABS/VSC codes. Does not have to be expensive. HFT has one for about $120 that I bought and it did read VSC code on TCH. It was something generically vague, basically, some sor of miscommunication between sensors and VSC module that tripped the light. How is that caused by BT adapter beats me.
Some also say that is you were using a CABLED OBD2 connector, that does not trip any codes. Basically, what they say, you can have a USB BT adapter plugged into USB/OBD2 port cable and have your Torque or laptop connected - and it will NOT trip any codes. Or, one of them expensive BT OBD2 adapters.