Prior to this setup, the DV was located just above the FMIC inlet, dumping into the same location as shown above. This produced DV codes randomly. Before using a metal ICI pipe, I had the DV in the location shown --- easier to install but it worked fine. I didn't think the location relative to the sensor would be significant, and adding a "T" to the metal pipe is a one-time event, so I chose the previous spot that worked properly.Would you not be better going in at the other side of the air temp/pressure sensor? It would be closer to the stock set up in terms of what the ECU is expecting. Mapping codes out is fine until you need them for diagnosis.
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Since "closer to what the ECU expects" didn't work for me, I chose to stay with what did work, ignoring how it looks. And I agree with you about the code being useful for diagnosis. I'm not likely to ever get another map, but if it happens, I shouldn't need to have this code over-ridden if it doesn't happen any more.