Lane A Red, Lane B Flashing Red

While I did loan my BUDS Dongle to Ray, I'm afraid I have not been much help to him in solving this problem.  Does anyone know what kind of wiring or sensor problem would only show up when both lanes are active? The AATP sensor is on Lane A, and the Oil Pressure Sensor is on Lane B. Either lane works fine with only one lane turned on. Once both lanes are turned on, both the AATP sensor and Oil Pressure Sensor show faults. That would indicate to me that each of these sensors is working fine, and something else is at play. 

We have verified the reference voltage (5 VDC) is correct at each sensor. We get an actual reading of 4.95 VDC, but close enough. And we have verified that this voltage does not change when one or both lanes are turned on. We have also tested continuity through the harness to each of the two sensors in question. It also appears that the readings are correct on both the Oil Pressure and Outside Air Temp and Pressure gauges, even when in fault. 

A wiring problem seems unlikely, since the plane operated for almost 40 hours without this problem. It's also a strange coincidence that these two sensors look to be on the same I/O positions on the two ECU lanes. In other words, they are both in the 15th sensor position down the list when looking at the BUDS Screen. I'm beginning to think this may be an ECU problem.   

Update:

After 4+ months messing around with the Rotax service center (CA/Utah) they have finally asked for the ECU and FUSE Box to be sent to them for testing. ($400.00 US with insurance! OUCH!!)

Perhaps I will get somewhere with this problem.

It looks like the ECU is toast.