Dan, when I had the gauge initially hooked up, it kept throwing the heater codes. Even called Innovate who told me to heat shield it or put it further downstream. I haven’t done either yet, but eventually realized it was the gauge somehow tripping the controller.
After I took the gauge out, the unit worked just fine for several months.
I even re-did my wiring and grounded the device to a dedicated ground line on the intake manifold.
Yet this morning with no errors on the LED, my AEM is stuck on 21.90 (5v I guess). I’m hoping its a wiring short but I’ve been pretty anal about wiring since last couple years so I’m hoping it’s not an issue.