Automatic Pro appears to cause "Red Triangle of Death" in 2nd Generation Prius

  • 1
  • Problem
  • Updated 6 months ago
I have a 2006 Toyota Prius with an Automatic Pro adapter and iOS.  On three separate occasions we have had the dreaded "Red Triangle of Death" (RTOD) display on the Prius with a check engine light.  Automatic Pro is not showing any OBD codes when this occurs.  When we remove the Automatic Pro and attempt to read codes, there are no codes to be read.  This has occurred both at a local repair shop and at the local Toyota dealership.  At both the local shop and at the dealer they were unable to read the codes when we brought the car in, and at the dealer we drove it straight to the dealer with the RTOD glowing on the dashboard.
After the dealer did $1800 of possibly unnecessary work, within a week after receiving the car back the RTOD showed again, and again Automatic Pro reports nothing, and after removing the device and checking with my own OBD reader there are no codes to be found.

It finally hit me: the key event in each case of the "disappearing RTOD/codes" at my house, the local repair shop, and the dealer is that in each case the Automatic Pro was removed.  When it is removed, the RTOD/code clears and the car operates normally.

I removed the Automatic Pro from the Prius and we have not had a problem with the vehicle for over a month.  The evidence indicates the Automatic Pro is the source of the RTOD.

The check compatibility tool on automatic.com says it is compatible with the 2006 Toyota Prius, but clearly there is an issue here.  I appear to be running the 1.2.36 firmware on the Pro.
Do I have a bad device, or is it just not compatible with the 2006 Toyota Prius?
Photo of Kerry Hughes

Kerry Hughes

  • 80 Points 75 badge 2x thumb
  • alarmed

Posted 6 months ago

  • 1
Photo of Ani

Ani, Customer Care Lead

  • 9,604 Points 5k badge 2x thumb
Hey Kerry, sorry to hear about that. I couldn't find your user account under the email you used here, I'm going to export this to our helpdesk to we can better assist. 
Photo of Kerry Hughes

Kerry Hughes

  • 80 Points 75 badge 2x thumb