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Welcome! Me too. Open Heater Circuit. I just keep clearing it on Mrs. Ultra Gauge, lol, always comes back within a few days. But no effects on MPG, I'll try to eventually get on it.
1193 is O2 heater circuit, downstream. Clear, and it will come back in two drive cycles. See attached. If you want the whole GEMS diagnostic manual, it is a link in my signature, not part of the RAVE.